ThreadUtils线程工具类

package com.rc.openapi.util;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ThreadUtils {

    // 单个线程处理的数据量
    private int singleCount;
    // 处理的总数据量
    private int listSize;
    // 开启的线程数
    private int runSize;
    // 操做的数据集
    private List<HashMap<Object, Object>> list;
    // 计数器
    private CountDownLatch begin, end;
    // 线程池
    private ExecutorService executorService;
    // 回调
    private CallBack callBack;

    public void setCallBack(CallBack callBack) {
        this.callBack = callBack;
    }

    public ThreadUtils(int singleCount, List<HashMap<Object, Object>> list) {
        this.singleCount = singleCount;
        this.list = list;
        if (list != null) {
            this.listSize = list.size();
            this.runSize = (this.listSize / this.singleCount) + 1;
        }
    }

    public void excute() throws InterruptedException {
        executorService = Executors.newFixedThreadPool(runSize);
        begin = new CountDownLatch(1);
        end = new CountDownLatch(runSize);
        //建立线程
        int startIndex = 0;
        int endIndex = 0;
        List<HashMap<Object, Object>> newList = null;
        for (int i = 0; i < runSize; i++) {
            //计算每一个线程对应的数据
            if (i < (runSize - 1)) {
                startIndex = i * singleCount;
                endIndex = (i + 1) * singleCount;
                newList = list.subList(startIndex, endIndex);
            } else {
                startIndex = i * singleCount;
                endIndex = listSize;
                newList = list.subList(startIndex, endIndex);
            }
            //建立线程类处理数据
            MyThread<HashMap<Object, Object>> myThread = new MyThread(newList, begin, end) {
                @Override
                public void method(List list) {
                    callBack.method(list);
                }
            };
            //执行线程
            executorService.execute(myThread);
        }
        //计数器减一
        begin.countDown();
        end.await();
        //关闭线程池
        executorService.shutdown();
    }

    //抽象线程类
    public abstract class MyThread<T> implements Runnable {

        private List<T> list;
        private CountDownLatch begin, end;

        public MyThread(List<T> list, CountDownLatch begin, CountDownLatch end) {
            this.list = list;
            this.begin = begin;
            this.end = end;
        }

        @Override
        public void run() {
            try {
                //执行程序
                method(list);
                begin.await();
            } catch (InterruptedException e) {
                e.printStackTrace();
            } finally {
                //计数器减一
                end.countDown();
            }
        }

        public abstract void method(List<T> list);
    }

    // 回调接口定义
    public interface CallBack<T> {
        void method(List<T> list);
    }


    public static void main(String[] agrs) {
        List<HashMap<Object, Object>> list = new ArrayList<>();
        for (int i = 0; i < 985; i++) {
            HashMap<Object, Object> map = new HashMap<>();
            map.put("A" + i, "00" + i);
            list.add(map);
        }
        System.out.println(list.toString());
        ThreadUtils tool = new ThreadUtils(5, list);
        tool.setCallBack(new CallBack<HashMap<Object, Object>>() {
            @Override
            public void method(List<HashMap<Object, Object>> list) {
                for (HashMap<Object, Object> objectObjectHashMap : list) {
                    try {
                        Thread.sleep(10000);
                        System.out.print(Thread.currentThread().getId() + ":" + objectObjectHashMap + " ");
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                System.out.println();
            }
        });
        try {
            tool.excute();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}