java線程池異常處理

java線程池對子線程異常的處理

廢話不多說，直接上代碼

1.通過重寫線程池的afterExecute()方法，代碼如下：

   static ThreadPoolExecutor threadPoolExecutor  = new ThreadPoolExecutor(5, 8, 60, TimeUnit.SECONDS, new ArrayBlockingQueue<>(1024), new ThreadFactory() {
        @Override
        public Thread newThread(Runnable r) {
            Thread t = new Thread(r);
            t.setName("導出線程池");
            return t;
        }
    },new ThreadPoolExecutor.AbortPolicy()){
          @Override
          protected void afterExecute(Runnable r, Throwable t) {
             if(null!=t){
                 t.printStackTrace();
             }
         }
    };

使用線程池的execute方法提交任務

 threadPoolExecutor.execute(() -> {
                System.out.println(1 / 0);
            });

結果如下，捕獲子線程的異常

2.使用submit()提交任務，得到future對象

線程池定義如下:

static ThreadPoolExecutor threadPoolExecutor  = new ThreadPoolExecutor(5, 8, 60, TimeUnit.SECONDS, new ArrayBlockingQueue<>(1024), new ThreadFactory() {
        @Override
        public Thread newThread(Runnable r) {
            Thread t = new Thread(r);
            t.setName("導出線程池");
            return t;
        }
    },new ThreadPoolExecutor.AbortPolicy()){
    };

通過submit提交任務:

try {
            Future<?> future = threadPoolExecutor.submit(() -> {
                System.out.println(1 / 0);
            });
            Object o = future.get();
        }catch (Exception e){
            System.out.println(e.getMessage()+" 方式二");
        }

方式二結果展示:

3.實現Thread.UncaughtExceptionHandler接口
線程池定義如下:

static ThreadPoolExecutor threadPoolExecutor  = new ThreadPoolExecutor(5, 8, 60, TimeUnit.SECONDS, new ArrayBlockingQueue<>(1024), new ThreadFactory() {
        @Override
        public Thread newThread(Runnable r) {
            Thread t = new Thread(r);
            t.setName("導出線程池");
            //設置子線程異常的處理器
            t.setUncaughtExceptionHandler(new ExportThreadPoolUncaughtExceptionHandler());
            return t;
        }
    },new ThreadPoolExecutor.AbortPolicy()){
    };

2.定義異常處理器:

 static class ExportThreadPoolUncaughtExceptionHandler  implements Thread.UncaughtExceptionHandler{

        @Override
        public void uncaughtException(Thread t, Throwable e) {
            if(null!=e){
                System.out.println(e.getMessage()+" 方式三");
            }
        }
    }

通過execute方式提交任務：

//3.實現Thread.UncaughtExceptionHandler接口，完成對子線程異常的處理
        threadPoolExecutor.execute(() -> {
            System.out.println(1 / 0);
        });

結果展示:

以上就是通過線程池提交任務，對子線程提交任務，異常的處理，如有錯誤，歡迎指正。。。