Threadpooltaskexecutor multi-threaded decomposition performs a simple comparison of time-consuming tasks with single-threaded serial execution

Import java.util.arraylist;import java.util.list;import java.util.concurrent.callable;import  java.util.concurrent.ExecutionException;import java.util.concurrent.Future;import  java.util.concurrent.threadpoolexecutor;import java.util.concurrent.timeunit;import  org.apache.commons.lang.stringutils;import org.apache.commons.lang.exception.exceptionutils;import  org.springframework.scheduling.concurrent.threadpooltaskexecutor;/** * <pre> * *   @author  tangxiaodong *  Date Created:  2014 November 18  * </pre> */public  class TaskTest {    /**     *  @param   args     *  @throws  executionexception      *   @throws  interruptedexception      */    public  static void main (String[] args)  throws interruptedexception, executionexception {         system.out.println ("TESTNOTHREADTASK&NBSP;BEGIN&NBSP; ...");         testnothreadtask ();                 fdfcutil.sleep (1);                 system.out.println ("TESTTHREADTASK&NBSP;BEGIN&NBSP; ...");         testthreadtask ();    }         Private static void testnothreadtask ()  {         Long t1 = system.currenttimemillis ();        for  ( int k = 0; k < 10; k++)  {             //  This is a time-consuming work             fdfcutil.sleep (k  + 1)  * 500);             System.out.println (" k="  + k);             system.out.println ("k="  + k +  " success");         }        system.out.println ("&NBSP;TIMES&NBSP;:");         system.out.println (System.currenttimemillis ()  - t1);     }            private  Static void testthreadtask () {                 // TODO Auto-generated method stub         threadpoOltaskexecutor executor = new threadpooltaskexecutor ();         executor.setcorepoolsize (2);         Executor.setmaxpoolsize (4);         executor.setkeepaliveseconds (120);         executor.setqueuecapacity (+);         executor.setrejectedexecutionhandler (New threadpoolexecutor.callerrunspolicy ());         executor.initialize ();                 list<future<string>> taskresults =  new ArrayList<Future<String>> (        long);  t1 = system.currenttimemillis ();         for (int k =0; k<10; k++) {&NBSP;&NBSP;&NBsp;         taskresults.add (Process (executor, k));         }        system.out.println ( "Task doing&nbsp ...");        while  (True)  {             boolean isAllDone = true;             for  (future<string>  Taskresult : taskresults)  {                 isAllDone &=  ( taskresult.isdone ()  | |  taskresult.iscancelled ()  );             }            if  (IsAllDone)  {                 //  tasks are completed, jump out of the loop                  break;             }            try {                 system.out.println (" WAITING&NBSP;AND&NBSP;SLEEP&NBSP;1000&NBSP, ... ");                 timeunit.milliseconds.sleep (;      )       } catch  (exception e)  {                 system.out.println (E.toString ());                 break;             }        }                 for (Future<String>  Taskresult : taskresults) {             string ex;            try {                 ex =  Taskresult.get ();            } catch  ( Exception e)  {                 ex = exceptionutils.getfullstacktrace (e);             }            if ( Stringutils.isnotempty (ex)) {   &nbsP;            system.out.println (ex);             }        }         system.out.println ("&NBSP;TIMES&NBSP;:");         system.out.println (System.currenttimemillis ()-t1);     }     private static future<string> process (final  threadpooltaskexecutor executor , final int k)  {         return executor.submit (new callable<string> ()  {              @Override              public string call ()  throws Exception {                 try {                     fdfcutil.sleep ((k+1) *500);                     system.out.println ("  k= " + k);                 } catch  (exception e)  {                     return exceptionutils.getfullstacktrace (e);                }                 return  "k="  + k +  " success";             }        });     }} 

Testnothreadtask Time:

times:27996 ms

Testthreadtask Time:

times:15239 ms

Threadpooltaskexecutor multi-threaded decomposition performs a simple comparison of time-consuming tasks with single-threaded serial execution