java多线程并发执行demo，主线程阻塞

package java8test;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Callable;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.LinkedBlockingQueue;

/**
 * @param  为被处理的数据类型
 * @param 返回数据类型
 * 知识点1：X,T为泛型，为什么要用泛型，泛型和Object的区别请看：https://www.cnblogs.com/xiaoxiong2015/p/12705815.html
 */
public abstract class MultiThread {

    public static int i = 0;

    // 知识点2：线程池:https://www.cnblogs.com/xiaoxiong2015/p/12706153.html
    private final ExecutorService exec; // 线程池

    // 知识点3：@author Doung Lea 队列：https://www.cnblogs.com/xiaoxiong2015/p/12825636.html
    private final BlockingQueue> queue = new LinkedBlockingQueue();

    // 知识点4：计数器，还是并发包大神 @author Doug Lea 编写。是一个原子安全的计数器，可以利用它实现发令枪
    private final CountDownLatch startLock = new CountDownLatch(1); // 启动门，当所有线程就绪时调用countDown

    private final CountDownLatch endLock; // 结束门

    private final List listData;// 被处理的数据

    /**
     * @param list list.size()为多少个线程处理，list里面的H为被处理的数据
     */
    public MultiThread(List list) {
        if (list != null && list.size() > 0) {
            this.listData = list;
            exec = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors()); // 创建线程池，线程池共有nThread个线程
            endLock = new CountDownLatch(list.size()); // 设置结束门计数器，当一个线程结束时调用countDown
        } else {
            listData = null;
            exec = null;
            endLock = null;
        }
    }

    /**
     * 
     * @return 获取每个线程处理结速的数组
     * @throws InterruptedException
     * @throws ExecutionException
     */
    public List getResult() throws InterruptedException, ExecutionException {

        List resultList = new ArrayList();
        if (listData != null && listData.size() > 0) {
            int nThread = listData.size(); // 线程数量
            for (int i = 0; i  future = exec.submit(new Task(i, data) {

                    @Override
                    public T execute(int currentThread, X data) {

                        return outExecute(currentThread, data);
                    }
                }); // 将任务提交到线程池
                queue.add(future); // 将Future实例添加至队列
            }
            startLock.countDown(); // 所有任务添加完毕，启动门计数器减1，这时计数器为0，所有添加的任务开始执行
            endLock.await(); // 主线程阻塞，直到所有线程执行完成
            for (Future future : queue) {
                resultList.add(future.get());
            }
            exec.shutdown(); // 关闭线程池
        }
        return resultList;
    }

    /**
     * 每一个线程执行的功能，需要调用者来实现
     * @param currentThread 线程号
     * @param data 每个线程被处理的数据
     * @return T返回对象
     */
    public abstract T outExecute(int currentThread, X data);

    /**
     * 线程类
     */
    private abstract class Task implements Callable {

        private int currentThread;// 当前线程号

        private X data;

        public Task(int currentThread, X data) {
            this.currentThread = currentThread;
            this.data = data;
        }

        @Override
        public T call() throws Exception {

            // startLock.await(); // 线程启动后调用await，当前线程阻塞，只有启动门计数器为0时当前线程才会往下执行
            T t = null;
            try {
                t = execute(currentThread, data);
            } finally {
                endLock.countDown(); // 线程执行完毕，结束门计数器减1
            }
            return t;
        }

        /**
         * 每一个线程执行的功能
         * @param currentThread 线程号
         * @param data 每个线程被处理的数据
         * @return T返回对象
         */
        public abstract T execute(int currentThread, X data);
    }
}

package java8test;

public class ResultVo {

    int i;

    public ResultVo(int i) {
        this.i = i;
    }

    public ResultVo() {
        // TODO Auto-generated constructor stub
    }

}

package java8test;

public class ParamVo {

    private int i;

    ParamVo(int i) {
        this.i = i;
    }

    public int getI() {

        return i;
    }

    @Override
    public String toString() {

        return String.valueOf(i) + "  " + hashCode();
    }
}

package java8test;

import java.util.ArrayList;
import java.util.List;

public class Test {

    public static void main(String[] args) {

        try {
            List splitList = new ArrayList();
            for (int i = 0; i  splitList1 = new ArrayList();
            for (int i = 200; i  multiThread = new MultiThread(splitList) {

                @Override
                public ResultVo outExecute(int currentThread, ParamVo data) {

                    System.out.println("当前线程名称：" + Thread.currentThread().getName() + "当前线程号=" + currentThread
                            + " data=" + data);
                    i--;
                    return new ResultVo(data.getI());
                }
            };

            MultiThread multiThread1 = new MultiThread(splitList1) {

                @Override
                public ResultVo outExecute(int currentThread, ParamVo data) {

                    System.out.println("当前线程名称：" + Thread.currentThread().getName() + "当前线程号=" + currentThread
                            + " data=" + data);
                    i--;
                    return new ResultVo(data.getI());
                }
            };
            List list = multiThread.getResult();
            List list1 = multiThread1.getResult();
            // 获取每一批次处理结果
            System.out.println("获取处理结果........................");
            for (ResultVo vo : list) {
                System.out.println(vo.i);
            }
            System.out.println("获取1处理结果........................");
            for (ResultVo vo : list1) {
                System.out.println(vo.i);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

}