當(dāng)我們通過(guò)submit提交任務(wù)到線(xiàn)程池，如果線(xiàn)程失敗，我們?cè)趺慈ゲ东@這個(gè)失敗而拋出來(lái)的異常呢

方法1：通過(guò)調(diào)用返回對(duì)象 FutureTask的get方法**

• FutureTask.get() will re-throw any exception thrown by the task as an ExecutorException

• 缺點(diǎn)：該方法是阻塞調(diào)用，會(huì)阻塞提交任務(wù)的線(xiàn)程

方法2：在提交的線(xiàn)程任務(wù)的 run() or call()使用 try{}catch{}Exceptoion{}進(jìn)行處理

Executors.newCachedThreadPool().submit(new Callable<Integer>() {

        @Override

        public Integer call() throws Exception {

                try {

                        int a = 1 / 0;

                        return 1;

                    } catch (Exception e) {

                            e.printStackTrace();

                    } finally {

                       //you can do something here，e.g.  log execution

                    }

                return 0;

         }

});

方法3：改寫(xiě)ThreadPoolExecutor的afterExecute方法

方法示例來(lái)自jdk的ThreadPoolExecutor的afterExecute方法注釋

class ExtendedExecutor extends ThreadPoolExecutor {

   // ...

   protected void afterExecute(Runnable r, Throwable t) {

       super.afterExecute(r, t);

       if (t == null && r instanceof Future<?>) {

            try {

                   Object result = ((Future<?>) r).get();

            } catch (CancellationException ce) {

                  t = ce;

            } catch (ExecutionException ee) {

                  t = ee.getCause();

             catch (InterruptedException ie) {

                 Thread.currentThread().interrupt(); // ignore/reset

            }

       }

      if (t != null)

            System.out.println(t);

      }

}

參考資料：https://stackoverflow.com/questions/2554549/handling-exceptions-for-threadpoolexecutor