Java 多线程多任务循环运行

import java.util.ArrayList;import java.util.Date;import java.util.HashMap;import java.util.List;import java.util.Map;public class ThreadManager {public List<Map<String, Object>> initList = new ArrayList<Map<String, Object>>();public int exit = 0;//0正常退出,-1异常退出public int countFlag = 3;//线程计数public static long count = 0;//加载次数计数器public boolean stop = false;//是否线程停止控制标识public String globalFlag = "";//控制标识位private ArrayList<WorkThread> workThreadList = new ArrayList<WorkThread>();////线程链表public ThreadManager(){Map<String,Object> map1 = new HashMap<String, Object>();Map<String,Object> map2 = new HashMap<String, Object>();Map<String,Object> map3 = new HashMap<String, Object>();map1.put("A",1);map1.put("B",2);map2.put("A", 1000);map2.put("B", 2000);map3.put("A", 21);map3.put("B", 22);initList.add(map1);initList.add(map2);initList.add(map3);for(int s=0;s<countFlag;s++){globalFlag +="0";}System.out.println("~~~初始化标识位:"+globalFlag);}public void start() {WorkThread worker;long startTime = new Date().getTime();long endTime = new Date().getTime();for (int i = 0; i < countFlag; ++i) {Map map = initList.get(i);worker = new WorkThread(this,i,map);workThreadList.add(worker);worker.start();//线程启动}while(!stop){boolean allFlag = true;for(int s=0;s<globalFlag.length();s++){if(globalFlag.charAt(s)!='1'){allFlag = false;break;}}if(allFlag){endTime = new Date().getTime();System.out.println("~~~~~~~~~~~~第 "+count+" 打印结束，总耗时："+(endTime-startTime)+" 毫秒~~~~~~~~~~~~");try {Thread.sleep(3000);} catch (NumberFormatException e) {e.printStackTrace();} catch (InterruptedException e) {e.printStackTrace();} count++;//this.stop=true;clearGlobalFlag('0');startTime = new Date().getTime(); }else{try {Thread.sleep(150);} catch (InterruptedException e) {e.printStackTrace();}}}System.exit(this.exit);}/** * 清除标识位 */public synchronized void clearGlobalFlag(char c){char[] cst = new char[globalFlag.length()];for(int s=0;s<globalFlag.length();s++){cst[s] = c; }globalFlag = new String(cst);}/** * 修改指定位对应的标识符 * @param index * @param c * @return */public synchronized boolean changeGlobalFlag(int index,char c){boolean bool = false;char[] cs = globalFlag.toCharArray();char[] cst = new char[cs.length];for(int s=0;s<cs.length;s++){if(s==index){cst[s] = c;}else{cst[s] = cs[s];}}globalFlag = new String(cst);bool = true;return bool;}public String getGlobalFlag(){return globalFlag;}/** * @param args */public static void main(String[] args) {ThreadManager threadManager = new ThreadManager();threadManager.start();}public int getExit() {return exit;}public synchronized void setExit(int exit) {this.exit = exit;}}

import java.util.Date;import java.util.HashMap;import java.util.Map;public class WorkThread extends Thread{    private ThreadManager threadManager;    private Map<String, Object> map = new HashMap<String, Object>();    private int index = 0;    public WorkThread(ThreadManager threadManager,int index,Map<String, Object> map){        this.threadManager=threadManager;        this.index=index;        this.map.putAll(map);    }    public void run() {        while (!threadManager.stop) {            int count = 0;            long startTime = 0;            long endTime = 0;            String msg = "~~~ 线程"+index+" 打印Map信息";            if(threadManager.getGlobalFlag().charAt(index)=='0'){                startTime = new Date().getTime();                System.out.println("--A--"+map.get("A")+"--B--"+map.get("B"));                endTime = new Date().getTime();                threadManager.changeGlobalFlag(index, '1');                System.out.println("--耗时："+(endTime-startTime)+" 毫秒");            }else{                try {                    Thread.sleep(100);                } catch (InterruptedException e) {                    e.printStackTrace();                }            }            }    }}

输出结果：
~~~初始化标识位:000
--A--1--B--2
--耗时：0 毫秒
--A--1000--B--2000
--耗时：0 毫秒
--A--21--B--22
--耗时：0 毫秒
~~~~~~~~~~~~第 0 打印结束，总耗时：154 毫秒~~~~~~~~~~~~
--A--1000--B--2000
--耗时：0 毫秒
--A--21--B--22
--耗时：0 毫秒
--A--1--B--2
--耗时：0 毫秒
~~~~~~~~~~~~第 1 打印结束，总耗时：150 毫秒~~~~~~~~~~~~
--A--1--B--2
--耗时：0 毫秒
--A--1000--B--2000
--耗时：0 毫秒
--A--21--B--22
--耗时：0 毫秒
~~~~~~~~~~~~第 2 打印结束，总耗时：150 毫秒~~~~~~~~~~~~