modify some codes

04.系统编码/01.xxl-job/xxl-job-executor/src/main/java/com/ping/chuan/ahpmsdp/xxljobexecutor/jobhandler/FileJobHandler.java

@@ -0,0 +1,30 @@
+package com.ping.chuan.ahpmsdp.xxljobexecutor.jobhandler;
+
+import com.ping.chuan.ahpmsdp.xxljobexecutor.service.IFileHandlerService;
+import com.xxl.job.core.handler.annotation.XxlJob;
+import org.springframework.stereotype.Component;
+
+import java.io.IOException;
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+
+/**
+ * @author: xiaowuler
+ * @createTime: 2022-04-07 10:02
+ * @describe: 文件 任务处理类
+ */
+@Component
+public class FileJobHandler {
+
+    private final IFileHandlerService fileHandlerService;
+
+    public FileJobHandler(IFileHandlerService fileHandlerService) {
+        this.fileHandlerService = fileHandlerService;
+    }
+
+    @XxlJob("deleteOut3DayFile")
+    public void deleteOut3DayFile() throws IOException {
+        fileHandlerService.deleteFile("C:\\SaveFile\\Source", LocalDateTime.now().minusDays(3).atZone(ZoneId.of("Asia/Shanghai")).toInstant().toEpochMilli());
+        fileHandlerService.deleteFile("C:\\SaveFile\\Target", LocalDateTime.now().minusDays(3).atZone(ZoneId.of("Asia/Shanghai")).toInstant().toEpochMilli());
+    }
+}

04.系统编码/01.xxl-job/xxl-job-executor/src/main/java/com/ping/chuan/ahpmsdp/xxljobexecutor/jobhandler/TianQingSCMOCJobHandler.java

@@ -1,164 +0,0 @@
-//package com.ping.chuan.ahpmsdp.xxljobexecutor.jobhandler;
-//
-//import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
-//import com.datastax.driver.core.Cluster;
-//import com.datastax.driver.core.Session;
-//import com.fasterxml.jackson.core.JsonProcessingException;
-//import com.fasterxml.jackson.core.type.TypeReference;
-//import com.fasterxml.jackson.databind.ObjectMapper;
-//import com.ping.chuan.ahpmsdp.xxljobexecutor.model.constant.FileStateConstant;
-//import com.ping.chuan.ahpmsdp.xxljobexecutor.model.constant.TimeConstant;
-//import com.ping.chuan.ahpmsdp.xxljobexecutor.model.dao.BaseInfo;
-//import com.ping.chuan.ahpmsdp.xxljobexecutor.model.dao.HandlerDetail;
-//import com.ping.chuan.ahpmsdp.xxljobexecutor.model.domain.ApplicationCommon;
-//import com.ping.chuan.ahpmsdp.xxljobexecutor.model.domain.Grb2Reader;
-//import com.ping.chuan.ahpmsdp.xxljobexecutor.model.vo.ParamInfo;
-//import com.ping.chuan.ahpmsdp.xxljobexecutor.model.vo.TianQingFileVO;
-//import com.ping.chuan.ahpmsdp.xxljobexecutor.model.vo.TianQingResponse;
-//import com.ping.chuan.ahpmsdp.xxljobexecutor.service.ITianQingSCMOCDataService;
-//import com.ping.chuan.ahpmsdp.xxljobexecutor.service.impl.BaseInfoService;
-//import com.ping.chuan.ahpmsdp.xxljobexecutor.util.FileUtil;
-//import com.ping.chuan.ahpmsdp.xxljobexecutor.util.WebUtil;
-//import com.xxl.job.core.context.XxlJobHelper;
-//import com.xxl.job.core.handler.annotation.XxlJob;
-//import org.springframework.stereotype.Component;
-//
-//import java.io.IOException;
-//import java.time.LocalDateTime;
-//import java.util.HashMap;
-//import java.util.List;
-//import java.util.Map;
-//import java.util.Objects;
-//
-///**
-// * @author xiaowuler
-// * 模式数据处理
-// */
-//@Component
-//public class TianQingSCMOCJobHandler {
-//
-//    private final ObjectMapper objectMapper = new ObjectMapper();
-//    private Map<String, TianQingResponse<List<TianQingFileVO>>> results = new HashMap<>();
-//
-//    private final ApplicationCommon applicationCommon;
-//    private final BaseInfoService baseInfoService;
-//    private final ITianQingSCMOCDataService tianQingSCMOCDataService;
-//
-//    public TianQingSCMOCJobHandler(ApplicationCommon applicationCommon, BaseInfoService baseInfoService, ITianQingSCMOCDataService tianQingSCMOCDataService){
-//        this.applicationCommon = applicationCommon;
-//        this.baseInfoService = baseInfoService;
-//        this.tianQingSCMOCDataService = tianQingSCMOCDataService;
-//    }
-//
-//    @XxlJob("readSCMOC")
-//    public void readSCMOC() throws Exception {
-//        XxlJobHelper.log("read SCMOC job handler start");
-//        String param = XxlJobHelper.getJobParam();
-//        ParamInfo paramInfo = objectMapper.readValue(param, ParamInfo.class);
-//        Map<String, Object> params = applicationCommon.prepareParams("scmoc");
-//        LocalDateTime startTime = LocalDateTime.now().minusHours(8).minusHours(paramInfo.getTimeLength());
-//        LocalDateTime endTime = LocalDateTime.now().minusHours(8);
-//
-//        TianQingResponse<List<TianQingFileVO>> tianQingResponse = request(String.format("[%s,%s]", startTime.format(TimeConstant.YYYYMMDDHHMM00), endTime.format(TimeConstant.YYYYMMDDHHMM00)), params);
-//        if (Objects.isNull(tianQingResponse)){
-//            return;
-//        }
-//
-//        Map<String, Boolean> results = download(tianQingResponse.getDs(), paramInfo.getElementCode());
-//        List<BaseInfo> baseInfos = baseInfoService.list(new QueryWrapper<BaseInfo>().ge("file_time", startTime).le("file_time", endTime).eq("mode_code", "SCMOC").eq("element_code", paramInfo.getBaseName()).eq("state", FileStateConstant.SUCCESS));
-//        convertFile(results, paramInfo.getVariable(), baseInfos, paramInfo.isWind());
-//
-//        XxlJobHelper.log("read SCMOC job end");
-//    }
-//
-//    public TianQingResponse<List<TianQingFileVO>> request(String timeRang, Map<String, Object> params) throws JsonProcessingException {
-//        synchronized (this){
-//            if (results.containsKey(timeRang)){
-//                return results.get(timeRang);
-//            }
-//
-//            results.clear();
-//            params.put("timeRange", timeRang);
-//            int index = 0;
-//            while (index < 3){
-//                String result = WebUtil.get(applicationCommon.getUrl(), params);
-//                TianQingResponse<List<TianQingFileVO>> tianQingResponse = objectMapper.readValue(result, new TypeReference<>() {});
-//                if (tianQingResponse.getReturnCode() == 0){
-//                    results.put(timeRang, tianQingResponse);
-//                    return tianQingResponse;
-//                }
-//
-//                index++;
-//            }
-//
-//            return null;
-//        }
-//    }
-//
-//    private void convertFile(Map<String, Boolean> results, String variable, List<BaseInfo> baseInfos, boolean isWind) throws IOException {
-//        for(Map.Entry<String, Boolean> entry : results.entrySet()){
-//            String filepath = entry.getKey();
-//            boolean result = entry.getValue();
-//            if (!result){
-//                continue;
-//            }
-//
-//            if (baseInfos.stream().filter(b -> b.getSourceFilePath().equals(filepath)).count() > 0){
-//                continue;
-//            }
-//
-//            BaseInfo baseInfo = Grb2Reader.readCLDASInfo(filepath);
-//            if (isWind) {
-//                tianQingSCMOCDataService.readWindElement(baseInfo);
-//            } else {
-//                tianQingSCMOCDataService.readRoutineElement(baseInfo, variable);
-//            }
-//        }
-//    }
-//
-//    private Map<String, Boolean> download(List<TianQingFileVO> tianQingFileVOs, String elementCode){
-//        Map<String, Boolean> results = new HashMap<>(tianQingFileVOs.size());
-//        for(TianQingFileVO tianQingFileVO: tianQingFileVOs){
-//            if (!tianQingFileVO.getFileName().contains(String.format("-%s-", elementCode))){
-//                continue;
-//            }
-//
-//            String saveFilepath = String.format("%s\\%s", "C:\\SaveFile\\Source", tianQingFileVO.getFileName());
-//            boolean result = FileUtil.downloadByNetwork(tianQingFileVO.getFileUrl(), saveFilepath);
-//            results.put(saveFilepath, result);
-//            XxlJobHelper.log("save file: [{}], result: {}", saveFilepath, result);
-//        }
-//        return results;
-//    }
-//
-//
-//    @XxlJob("insertNoSql")
-//    public void insertHandlerDetailToNoSql(){
-//        Cluster cluster = null;
-//        Session session = null;
-//        HandlerDetail handlerDetail = new HandlerDetail();
-//        handlerDetail.setWriteTime(LocalDateTime.now());
-//        handlerDetail.setTargetFilePath("xxxxxxxxxxxxx");
-//        handlerDetail.setTimeEffect(1);
-//        handlerDetail.setState(1);
-//        handlerDetail.setForecastTime(LocalDateTime.now());
-//        handlerDetail.setResult("5555444");
-//
-//        try {
-//            cluster = Cluster.builder().addContactPoints("199.1.1.81").withCredentials("ahgfzx","ahgfzx@2020").build();
-//            session = cluster.connect();
-//
-//            String createKeySpaceCQL = "create keyspace if not exists keyspace with replication = {'class':'SimpleStrategy', 'replication_factor':1}";
-//            session.execute(createKeySpaceCQL);
-//
-//            String createTableCQL = "create table if not exists keyspace.HandlerDetail(targetFilePath varchar primary key, forecastTime datetime, timeEffect int, writeTime datetime, state int, result varchar)";
-//            session.execute(createTableCQL);
-//
-//        }catch (Exception e) {
-//            e.printStackTrace();
-//        } finally {
-//            cluster.close();
-//            session.close();
-//        }
-//    }
-//}

04.系统编码/01.xxl-job/xxl-job-executor/src/main/java/com/ping/chuan/ahpmsdp/xxljobexecutor/service/IFileHandlerService.java

@@ -0,0 +1,12 @@
+package com.ping.chuan.ahpmsdp.xxljobexecutor.service;
+
+import java.time.LocalDateTime;
+
+/**
+ * @author: xiaowuler
+ * @createTime: 2022-04-07 10:08
+ * @describe: 文件 处理 接口
+ */
+public interface IFileHandlerService {
+    void deleteFile(String filePath, long milliseconds);
+}

04.系统编码/01.xxl-job/xxl-job-executor/src/main/java/com/ping/chuan/ahpmsdp/xxljobexecutor/service/impl/FileHandlerService.java

@@ -0,0 +1,34 @@
+package com.ping.chuan.ahpmsdp.xxljobexecutor.service.impl;
+
+import com.ping.chuan.ahpmsdp.xxljobexecutor.service.IFileHandlerService;
+import org.springframework.stereotype.Component;
+
+import java.io.File;
+import java.time.LocalDateTime;
+
+/**
+ * @author: xiaowuler
+ * @createTime: 2022-04-07 10:09
+ * @describe: 文件 处理 服务
+ */
+@Component
+public class FileHandlerService implements IFileHandlerService {
+    @Override
+    public void deleteFile(String filePath, long milliseconds) {
+        File file = new File(filePath);
+        if (file.isFile()) {
+            if (milliseconds > file.lastModified()) {
+                file.delete();
+            }
+            return;
+        }
+
+        for (File targetFile : file.listFiles()) {
+            deleteFile(targetFile.getAbsolutePath(), milliseconds);
+        }
+
+        if (file.listFiles().length == 0) {
+            file.delete();
+        }
+    }
+}

04.系统编码/01.xxl-job/xxl-job-executor/src/main/java/com/ping/chuan/ahpmsdp/xxljobexecutor/template/CacheTemplate.java

@@ -32,7 +32,7 @@ public class CacheTemplate {
         this.metaInfoRepository = metaInfoRepository;
     }
 
-    @PostConstruct
+//    @PostConstruct
     public void init() {
         log.info("loading cache template");
         List<Coordinate> coordinates = coordinateRepository.findAll();

04.系统编码/01.xxl-job/xxl-job-executor/src/test/java/com/ping/chuan/ahpmsdp/xxljobexecutor/XxlJobExecutorApplicationTests.java

@@ -9,10 +9,7 @@ import com.ping.chuan.ahpmsdp.xxljobexecutor.model.dao.BaseInfo;
 import com.ping.chuan.ahpmsdp.xxljobexecutor.model.dao.DealInfo;
 import com.ping.chuan.ahpmsdp.xxljobexecutor.model.domain.ElementInfo;
 import com.ping.chuan.ahpmsdp.xxljobexecutor.model.domain.Grb2Reader;
-import com.ping.chuan.ahpmsdp.xxljobexecutor.service.IDealInfoService;
-import com.ping.chuan.ahpmsdp.xxljobexecutor.service.ISchemaService;
-import com.ping.chuan.ahpmsdp.xxljobexecutor.service.ITianQingCLDASDataService;
-import com.ping.chuan.ahpmsdp.xxljobexecutor.service.ITianQingSCMOCDataService;
+import com.ping.chuan.ahpmsdp.xxljobexecutor.service.*;
 import com.ping.chuan.ahpmsdp.xxljobexecutor.service.impl.SchemaService;
 import com.ping.chuan.ahpmsdp.xxljobexecutor.template.CassandraTemplate;
 import com.ping.chuan.ahpmsdp.xxljobexecutor.util.FileUtil;
@@ -106,7 +103,7 @@ class XxlJobExecutorApplicationTests {
         Insert builder = QueryBuilder.insertInto("data_config", "coordinates")
                 .values(columnNames, values);
         cassandraTemplate.getSession().execute(builder);
-//        schemaRepository.prepareTable("data_config", "coordinates", partitionKey, columns);
+//        schemaRepository.prepareTable("data_config", "coordinates", 0, partitionKey, columns);
     }
 
     @Test
@@ -127,7 +124,7 @@ class XxlJobExecutorApplicationTests {
         columns.put("lat_clip_count", DataType.cint());
         columns.put("lon_clip_count", DataType.cint());
         columns.put("full_name_escaped", DataType.varchar());
-//        schemaRepository.prepareTable("data_config", "meta_infos", partitionKey, columns);
+//        schemaRepository.prepareTable("data_config", "meta_infos", 0, partitionKey, columns);
 
         List<String> columnNames = new ArrayList<>(partitionKey.keySet());
         columnNames.addAll(columns.keySet());
@@ -313,4 +310,11 @@ class XxlJobExecutorApplicationTests {
         schemaRepository.prepareTable("data_202204", "test", 10, partitionKey, columns);
     }
 
+    @Autowired
+    private IFileHandlerService fileHandlerService;
+    @Test
+    void deleteFile(){
+        fileHandlerService.deleteFile("F:\\test\\ss", LocalDateTime.now().minusDays(3).atZone(ZoneId.of("Asia/Shanghai")).toInstant().toEpochMilli());
+    }
+
 }

04.系统编码/02.api-service/src/main/java/com/ping/chuan/apiservice/config/SwaggerConfig.java

@@ -27,7 +27,7 @@ public class SwaggerConfig {
     private ApiInfo apiInfo() {
         return new ApiInfoBuilder()
                 .title("安徽省公共气象服务基础数据平台")
-                .description("测试")
+                .description("数据接口测试")
                 .version("5.2.1")
                 .build();
     }

04.系统编码/interview-demo/.gitignore

@@ -0,0 +1,33 @@
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/

04.系统编码/interview-demo/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.4/apache-maven-3.8.4-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar

04.系统编码/interview-demo/mvnw

@@ -0,0 +1,316 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven Start Up Batch script
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   M2_HOME - location of maven2's installed home dir
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /usr/local/etc/mavenrc ] ; then
+    . /usr/local/etc/mavenrc
+  fi
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        export JAVA_HOME="`/usr/libexec/java_home`"
+      else
+        export JAVA_HOME="/Library/Java/Home"
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+if [ -z "$M2_HOME" ] ; then
+  ## resolve links - $0 may be a link to maven's home
+  PRG="$0"
+
+  # need this for relative symlinks
+  while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+      PRG="$link"
+    else
+      PRG="`dirname "$PRG"`/$link"
+    fi
+  done
+
+  saveddir=`pwd`
+
+  M2_HOME=`dirname "$PRG"`/..
+
+  # make it fully qualified
+  M2_HOME=`cd "$M2_HOME" && pwd`
+
+  cd "$saveddir"
+  # echo Using m2 at $M2_HOME
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --unix "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME="`(cd "$M2_HOME"; pwd)`"
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="`which javac`"
+  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=`which readlink`
+    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+      if $darwin ; then
+        javaHome="`dirname \"$javaExecutable\"`"
+        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+      else
+        javaExecutable="`readlink -f \"$javaExecutable\"`"
+      fi
+      javaHome="`dirname \"$javaExecutable\"`"
+      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD="`\\unset -f command; \\command -v java`"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=`cd "$wdir/.."; pwd`
+    fi
+    # end of workaround
+  done
+  echo "${basedir}"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    echo "$(tr -s '\n' ' ' < "$1")"
+  fi
+}
+
+BASE_DIR=`find_maven_basedir "$(pwd)"`
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Found .mvn/wrapper/maven-wrapper.jar"
+    fi
+else
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+    fi
+    if [ -n "$MVNW_REPOURL" ]; then
+      jarUrl="$MVNW_REPOURL/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+    else
+      jarUrl="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+    fi
+    while IFS="=" read key value; do
+      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
+      esac
+    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Downloading from: $jarUrl"
+    fi
+    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
+    if $cygwin; then
+      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
+    fi
+
+    if command -v wget > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found wget ... using wget"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget "$jarUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+        else
+            wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+        fi
+    elif command -v curl > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found curl ... using curl"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl -o "$wrapperJarPath" "$jarUrl" -f
+        else
+            curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
+        fi
+
+    else
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Falling back to using Java to download"
+        fi
+        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaClass=`cygpath --path --windows "$javaClass"`
+        fi
+        if [ -e "$javaClass" ]; then
+            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Compiling MavenWrapperDownloader.java ..."
+                fi
+                # Compiling the Java class
+                ("$JAVA_HOME/bin/javac" "$javaClass")
+            fi
+            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                # Running the downloader
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Running MavenWrapperDownloader.java ..."
+                fi
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+if [ "$MVNW_VERBOSE" = true ]; then
+  echo $MAVEN_PROJECTBASEDIR
+fi
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --path --windows "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  $MAVEN_DEBUG_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.home=${M2_HOME}" \
+  "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

04.系统编码/interview-demo/mvnw.cmd

@@ -0,0 +1,188 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    https://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat" %*
+if exist "%USERPROFILE%\mavenrc_pre.cmd" call "%USERPROFILE%\mavenrc_pre.cmd" %*
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+
+FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET DOWNLOAD_URL="%MVNW_REPOURL%/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %DOWNLOAD_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% ^
+  %JVM_CONFIG_MAVEN_PROPS% ^
+  %MAVEN_OPTS% ^
+  %MAVEN_DEBUG_OPTS% ^
+  -classpath %WRAPPER_JAR% ^
+  "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" ^
+  %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%"=="" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_post.bat" call "%USERPROFILE%\mavenrc_post.bat"
+if exist "%USERPROFILE%\mavenrc_post.cmd" call "%USERPROFILE%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%"=="on" pause
+
+if "%MAVEN_TERMINATE_CMD%"=="on" exit %ERROR_CODE%
+
+cmd /C exit /B %ERROR_CODE%

04.系统编码/interview-demo/pom.xml

@@ -0,0 +1,62 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.6.6</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+    <groupId>com.xiaowuler</groupId>
+    <artifactId>interview-demo</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>interview-demo</name>
+    <description>interview-demo</description>
+    <properties>
+        <java.version>1.8</java.version>
+    </properties>
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-json</artifactId>
+            <version>2.5.2</version>
+            <scope>compile</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <configuration>
+                    <excludes>
+                        <exclude>
+                            <groupId>org.projectlombok</groupId>
+                            <artifactId>lombok</artifactId>
+                        </exclude>
+                    </excludes>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

04.系统编码/interview-demo/src/main/java/com/xiaowuler/interviewdemo/InterviewDemoApplication.java

@@ -0,0 +1,13 @@
+package com.xiaowuler.interviewdemo;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class InterviewDemoApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(InterviewDemoApplication.class, args);
+    }
+
+}

04.系统编码/interview-demo/src/main/java/com/xiaowuler/interviewdemo/test/CollectionTest.java

@@ -0,0 +1,81 @@
+package com.xiaowuler.interviewdemo.test;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.xiaowuler.interviewdemo.test.util.CollectorsUtils;
+
+import java.math.BigDecimal;
+import java.util.*;
+import java.util.stream.Collector;
+import java.util.stream.Collectors;
+
+/**
+ * @author: xiaowuler
+ * @createTime: 2022-05-06 13:44
+ * @describe: 集合测试
+ */
+public class CollectionTest {
+    public static void main(String[] args) throws JsonProcessingException {
+        testHashMap();
+        testMapMerger();
+        Float[] floats = new Float[555];
+        Arrays.fill(floats, 0.0f);
+        Float[] target = new Float[801];
+        Arrays.fill(target, Float.NaN);
+        System.arraycopy(floats, 0, target, 6, floats.length);
+        System.out.println(Arrays.toString(target));
+    }
+
+    private static void testHashMap() throws JsonProcessingException {
+
+        String text = "{0=1427159046724165633, 1=1395908122255495169, 2=实时监控数据, 3=测试1, 4=0, 5=null, 6=启用}\n" +
+                "{0=1430091584367169537, 1=1395908122255495169, 2=测试1-2, 3=测试2, 4=1427159046724165633, 5=实时监控数据, 6=启用}\n" +
+                "{0=1430419967089250306, 1=1395908122255495169, 2=主机基本信息, 3=2, 4=0, 5=null, 6=启用}\n" +
+                "{0=1437341320002326529, 1=1395908122255495169, 2=用户相关, 3=Ttest1 descrption, 4=0, 5=null, 6=启用}\n" +
+                "{0=1437598497426366466, 1=-1, 2=Ttestdir1-1, 3=test dir 1-1, 4=1437598194912190466, 5=Ttestdir1, 6=启用}";
+
+        String text1 = "{0=1427159046724165633, 1=1395908122255495169, 2=实时监控数据, 3=测试1, 4=0, 5=null, 6=启用}";
+        ObjectMapper mapper = new ObjectMapper();
+        LinkedHashMap<Object, Object> result = mapper.readValue(text1, new TypeReference<LinkedHashMap<Object, Object>>() {});
+        System.out.println("");
+    }
+
+    private static void testMapMerger(){
+        Map<String, BigDecimal> map1 = new HashMap<String, BigDecimal>(){{
+            put("a", null);
+            put("b", new BigDecimal(2));
+            put("c", new BigDecimal(3));
+        }};
+
+        Map<String, BigDecimal> map2 = new HashMap<String, BigDecimal>(){{
+            put("a", new BigDecimal(1));
+            put("b", new BigDecimal(2));
+            put("c", new BigDecimal(3));
+        }};
+
+        List<Map.Entry<String, BigDecimal>> target = new ArrayList<>(map1.entrySet());
+        target.addAll(map2.entrySet());
+        target.addAll(target);
+
+        Map<String, BigDecimal> result = target.stream()
+                .collect(
+                        Collectors.groupingBy(
+                                Map.Entry<String, BigDecimal> :: getKey,
+                                Collectors.mapping(entry -> Objects.isNull( entry.getValue()) ? BigDecimal.ZERO : entry.getValue(), Collectors.reducing(BigDecimal.ZERO, BigDecimal :: add))
+                        )
+                );
+        System.out.println(result);
+    }
+
+    private <T> T create(Class<T> clazz){
+        try {
+            return clazz.newInstance();
+        } catch (InstantiationException e) {
+            e.printStackTrace();
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+}

04.系统编码/interview-demo/src/main/java/com/xiaowuler/interviewdemo/test/ListTest.java

@@ -0,0 +1,40 @@
+package com.xiaowuler.interviewdemo.test;
+
+import java.io.PrintStream;
+import java.util.*;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.Executors;
+import java.util.stream.Collectors;
+
+/**
+ * @author: xiaowuler
+ * @createTime: 2022-04-07 14:46
+ * @describe: 集合测试
+ */
+public class ListTest {
+    public void handler(){
+        List<String> names = Collections.synchronizedList(new ArrayList<>(2));
+        names.add("xiaowuler");
+        names.add("xiaowuler");
+        names.add("xiaowuler");
+
+        String name = "xiaowuler";
+
+        Map<String, String> map = new HashMap<>();
+        map.put(null, "xiaowuler");
+        map.put(null, "xiaowuler11");
+        System.out.println("");
+    }
+
+    public void createConcurrentHashMap(){
+        Map<String, String> map = new ConcurrentHashMap<>();
+        map.put(null, "xiaowuler");
+        map.put(null, "xiaowuler11");
+        map.putIfAbsent(null, "xiaowuler22");
+    }
+
+    public static void main(String[] args) {
+        ListTest listTest = new ListTest();
+        listTest.handler();
+    }
+}

04.系统编码/interview-demo/src/main/java/com/xiaowuler/interviewdemo/test/thread/CallableImpl.java

@@ -0,0 +1,15 @@
+package com.xiaowuler.interviewdemo.test.thread;
+
+import java.util.concurrent.Callable;
+
+/**
+ * @author: xiaowuler
+ * @createTime: 2022-04-12 09:58
+ * @describe: 实现 callable 创建线程
+ */
+public class CallableImpl implements Callable<String> {
+    @Override
+    public String call() throws Exception {
+        return Thread.currentThread().getName();
+    }
+}

04.系统编码/interview-demo/src/main/java/com/xiaowuler/interviewdemo/test/thread/DirectByteBufferTest.java

@@ -0,0 +1,23 @@
+package com.xiaowuler.interviewdemo.test.thread;
+
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * @author: xiaowuler
+ * @createTime: 2022-05-05 09:58
+ * @describe: 直接内存 测试
+ */
+public class DirectByteBufferTest {
+    public static void main(String[] args) {
+        //创建一个直接内存
+//        ByteBuffer buffer = ByteBuffer.allocateDirect(1024);
+
+        Float[] list = new Float[10];
+        Arrays.fill(list, Float.NaN);  //填充集合
+        System.out.println(list);
+    }
+}

04.系统编码/interview-demo/src/main/java/com/xiaowuler/interviewdemo/test/thread/RunnableImpl.java

@@ -0,0 +1,13 @@
+package com.xiaowuler.interviewdemo.test.thread;
+
+/**
+ * @author: xiaowuler
+ * @createTime: 2022-04-12 09:56
+ * @describe: 实现 Runnable 创建个线程
+ */
+public class RunnableImpl implements Runnable {
+    @Override
+    public void run() {
+        System.out.println("线程名称：" + Thread.currentThread().getName() + "，线程ID：" + Thread.currentThread().getId());
+    }
+}

04.系统编码/interview-demo/src/main/java/com/xiaowuler/interviewdemo/test/thread/ThreadTest.java

@@ -0,0 +1,36 @@
+package com.xiaowuler.interviewdemo.test.thread;
+
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.FutureTask;
+
+/**
+ * @author: xiaowuler
+ * @createTime: 2022-04-12 09:53
+ * @describe: 线程测试
+ */
+public class ThreadTest {
+    public void createThread(){
+        new Thread(new Runnable() {
+            @Override
+            public void run() {
+                System.out.println("线程名称："+Thread.currentThread().getName());
+            }
+        }).start();
+    }
+
+    public static void main(String[] args) throws ExecutionException, InterruptedException {
+        RunnableImpl runnable = new RunnableImpl();
+        Thread thread = new Thread(runnable);
+        thread.start();
+
+        ThreadTest threadTest = new ThreadTest();
+        threadTest.createThread();
+
+        CallableImpl callable = new CallableImpl();
+        FutureTask<String> futureTask = new FutureTask<>(callable);
+        futureTask.run();
+        System.out.println(futureTask.isDone());
+
+
+    }
+}

04.系统编码/interview-demo/src/main/java/com/xiaowuler/interviewdemo/test/threadpool/ThreadPoolTest.java

@@ -0,0 +1,72 @@
+package com.xiaowuler.interviewdemo.test.threadpool;
+
+import java.util.concurrent.*;
+import java.util.concurrent.atomic.AtomicInteger;
+
+/**
+ * @author: xiaowuler
+ * @createTime: 2022-04-12 10:30
+ * @describe: 线程池测试
+ */
+public class ThreadPoolTest {
+    public static void main(String[] args) {
+//
+//        ThreadPoolExecutor threadPoolExecutor = new ThreadPoolExecutor(
+//                1,
+//                5,
+//                60L,
+//                TimeUnit.SECONDS,
+//                new LinkedBlockingQueue<>(10),
+//                new NamedThreadFactory("test"),
+//                new ThreadPoolExecutor.CallerRunsPolicy()
+//        );
+//
+//        for(int index = 0; index < 50; index++){
+//            threadPoolExecutor.execute(() -> {
+//                System.out.println(Thread.currentThread().getName() + ": hello world");
+//            });
+//        }
+
+        retry:
+        for(int index = 0; index < 50; index++){
+            for(int i = 0; i < 10; i++){
+                System.out.println(i + ": " + index);
+                break retry;
+            }
+        }
+
+        synchronized (ThreadPoolTest.class) {
+            System.out.println("hello world");
+        }
+
+        Runnable thread = () -> {
+            System.out.println("hello world");
+        };
+        thread.run();
+
+        System.out.println("end");
+    }
+
+    static class NamedThreadFactory implements ThreadFactory {
+
+        private final AtomicInteger poolNumber = new AtomicInteger(1);
+        private final ThreadGroup group;
+        private final AtomicInteger threadNumber = new AtomicInteger(1);
+        private final String namePrefix;
+
+        NamedThreadFactory(String name) {
+            SecurityManager s = System.getSecurityManager();
+            group = (s != null) ? s.getThreadGroup() : Thread.currentThread().getThreadGroup();
+            namePrefix = name + "-" + poolNumber.getAndIncrement() + "-thread-";
+        }
+
+        public Thread newThread(Runnable r) {
+            Thread t = new Thread(group, r, namePrefix + threadNumber.getAndIncrement(), 0);
+            if (t.isDaemon())
+                t.setDaemon(false);
+            if (t.getPriority() != Thread.NORM_PRIORITY)
+                t.setPriority(Thread.NORM_PRIORITY);
+            return t;
+        }
+    }
+}

04.系统编码/interview-demo/src/main/java/com/xiaowuler/interviewdemo/test/util/CollectorsUtils.java

@@ -0,0 +1,95 @@
+package com.xiaowuler.interviewdemo.test.util;
+
+import java.math.BigDecimal;
+import java.util.Collections;
+import java.util.Set;
+import java.util.function.BiConsumer;
+import java.util.function.BinaryOperator;
+import java.util.function.Function;
+import java.util.function.Supplier;
+import java.util.stream.Collector;
+
+/**
+ * @author: xiaowuler
+ * @createTime: 2022-05-31 17:29
+ * @describe: 集合工具类
+ */
+public class CollectorsUtils {
+    static final Set<Collector.Characteristics> CH_NOID = Collections.emptySet();
+
+    private CollectorsUtils() {
+    }
+
+    @SuppressWarnings("unchecked")
+    private static <I, R> Function<I, R> castingIdentity() {
+        return i -> (R) i;
+    }
+
+    /**
+     * Simple implementation class for {@code Collector}.
+     *
+     * @param <T>
+     *            the type of elements to be collected
+     * @param <R>
+     *            the type of the result
+     */
+    static class CollectorImpl<T, A, R> implements Collector<T, A, R> {
+        private final Supplier<A> supplier;
+        private final BiConsumer<A, T> accumulator;
+        private final BinaryOperator<A> combiner;
+        private final Function<A, R> finisher;
+        private final Set<Characteristics> characteristics;
+
+        CollectorImpl(Supplier<A> supplier, BiConsumer<A, T> accumulator, BinaryOperator<A> combiner,
+                      Function<A, R> finisher, Set<Characteristics> characteristics) {
+            this.supplier = supplier;
+            this.accumulator = accumulator;
+            this.combiner = combiner;
+            this.finisher = finisher;
+            this.characteristics = characteristics;
+        }
+
+        CollectorImpl(Supplier<A> supplier, BiConsumer<A, T> accumulator, BinaryOperator<A> combiner,
+                      Set<Characteristics> characteristics) {
+            this(supplier, accumulator, combiner, castingIdentity(), characteristics);
+        }
+
+        @Override
+        public BiConsumer<A, T> accumulator() {
+            return accumulator;
+        }
+
+        @Override
+        public Supplier<A> supplier() {
+            return supplier;
+        }
+
+        @Override
+        public BinaryOperator<A> combiner() {
+            return combiner;
+        }
+
+        @Override
+        public Function<A, R> finisher() {
+            return finisher;
+        }
+
+        @Override
+        public Set<Characteristics> characteristics() {
+            return characteristics;
+        }
+    }
+
+    public static <T> Collector<T, ?, BigDecimal> summingBigDecimal(ToBigDecimalFunction<T> mapper) {
+        return new CollectorImpl<>(() -> new BigDecimal[1], (a, t) -> {
+            if (a[0] == null) {
+                a[0] = BigDecimal.ZERO;
+            }
+            a[0] = a[0].add(mapper.applyAsBigDecimal(t));
+        }, (a, b) -> {
+            a[0] = a[0].add(b[0]);
+            return a;
+        }, a -> a[0], CH_NOID);
+    }
+
+}

04.系统编码/interview-demo/src/main/java/com/xiaowuler/interviewdemo/test/util/ToBigDecimalFunction.java

@@ -0,0 +1,19 @@
+package com.xiaowuler.interviewdemo.test.util;
+
+import java.math.BigDecimal;
+
+/**
+ * @author: xiaowuler
+ * @createTime: 2022-05-31 17:32
+ * @describe: bigDecimal 接口类
+ */
+@FunctionalInterface
+public interface ToBigDecimalFunction<T> {
+    /**
+     * Applies this function to the given argument.
+     *
+     * @param value the function argument
+     * @return the function result
+     */
+    BigDecimal applyAsBigDecimal(T value);
+}

04.系统编码/interview-demo/src/main/resources/application.properties

@@ -0,0 +1 @@
+

04.系统编码/interview-demo/src/test/java/com/xiaowuler/interviewdemo/InterviewDemoApplicationTests.java

@@ -0,0 +1,13 @@
+package com.xiaowuler.interviewdemo;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class InterviewDemoApplicationTests {
+
+    @Test
+    void contextLoads() {
+    }
+
+}