1.將一個(gè)大任務(wù)分解成幾個(gè)小的任務(wù)，并發(fā)執(zhí)行，提高系統(tǒng)的吞吐量。

2.master

//任務(wù)隊(duì)列
protected Queue<Object> workQueue = new ConcurrentLinkedQueue<Object>();
//woker隊(duì)列
protected Map<String,Thread> threadMap = new HashMap<>();
//子任務(wù)的結(jié)果處理集
protected Map<String,Object> = new ConcurrentHashMap<>(); 

//是否所有的子任務(wù)都結(jié)束了
    public boolean isComplete() {
        for (Map.Entry<String, Thread> entry : threadMap.entrySet()) {
            if (entry.getValue().getState()!=Thread.State.TERMINATED){
                return false;
            }
        }
        return true;
    }

public Master(Worker worker,int workerCount){
    worker.setQueue(workQueue);
    worker.setResultMap(resultMap);
    //創(chuàng)建worker
      for (int i = 0; i < countWorker; i++) {
            threadMap.put(Integer.toString(i),new Thread(worker));
        }
}

 //提交一個(gè)任務(wù)
    public void submit(Object job){
        workQuery.add(job);
    }

//返回子任務(wù)結(jié)果集
    public Map<String,Object> getResultMap(){
        return resultMap;
    }

//開(kāi)始運(yùn)行所有的worker
public void  execute(){
        for (Map.Entry<String,Thread> entry : threadMap.entrySet()){
            entry.getValue().start();
        }

worker implements Runnable

//任務(wù)隊(duì)列，用于取得子任務(wù)
    protected Queue<Object> workQueue;
    //子任務(wù)處理結(jié)果集
    protected Map<String, Object> resultMap;
public void setWorkQueue(Queue<Object> workQueue) {
        this.workQueue = workQueue;
    }

    public void setResultMap(Map<String, Object> resultMap) {
        this.resultMap = resultMap;
    }

  //子任務(wù)處理的邏輯，在子類(lèi)中實(shí)現(xiàn)具體邏輯
    public Object handle(Object input) {
        return input;
    }
 @Override
    public void run() {
    }