1.線程池的創建,具體ThreadPoolExecutor參數可以百度
import java.util.concurrent.Callable; import java.util.concurrent.Future; import java.util.concurrent.LinkedBlockingQueue; import java.util.concurrent.ThreadPoolExecutor; import java.util.concurrent.TimeUnit; /** * 一、LinkedBlockingQueue,除非系統資源耗盡,否則不存在任務隊列入隊失敗的情況。 * 二、當有新任務需要執行時,如果線程池的實際線程數小於corePoolSize,則會創建新線程執行任務;但當池中線程數達到corePoolSize後,就不會再創建新的線程!若後續有新任務需要執行,且沒有空閒的線程時,則任務進入隊列等待。 * 三、如果任務創建和處理速度相差很大,LinkedBlockingQueue會快速增長,直到耗盡系統內存 * 線程池工廠類<br> * 〈功能詳細描述〉 */ public class ThreadPoolUtil { private static ThreadPoolUtil instance = new ThreadPoolUtil(); private ThreadPoolUtil() { int cpuNums = Runtime.getRuntime().availableProcessors(); threadPool = new ThreadPoolExecutor(cpuNums * 2, 32, 5, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>(), new ThreadPoolExecutor.DiscardOldestPolicy()); } public ThreadPoolExecutor threadPool; public static void exec(Runnable runnable) { instance.threadPool.execute(runnable); } public static <T> Future<T> sub(Callable<T> runnable) { return instance.threadPool.submit(runnable); } }
2.創建自己線程類
class 返回值 implements Callable<JSONObject> { @Override public JSONObject call() throws Exception { //此處業務處理,需要參數可以通過構造方法傳入 return null; } }
3.調用線程池sub方法傳入線程
for (int i = 0; i < xx.size(); i++) { com.util.ThreadPoolUtil.sub(new pushWithdrawThread()); }