封装异常处理之坑

    public static void main(String []f) {
        try {
            test();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static void test() {
        try {
            int i = 1 / 0;
        } catch (Exception e) {
            throw new RuntimeException("hh");
        }
    }

  

java.lang.RuntimeException: hh  msg遗失

at com.xxx.config.exception.DBException.test(DBException.java:39)    第一堆栈:throw new RuntimeException("hh");遗失了第一现场
at com.xxx.config.exception.DBException.main(DBException.java:29)

小结:msg遗失,堆栈第一现场遗失

 项目中做了修复:

 

-===========================================

    private static void test() {
        try {
            int i = 1 / 0;
        } catch (Exception e) {
            throw new RuntimeException("hh", e);
        }
    }

  

java.lang.RuntimeException: hh
at com.xxx.config.exception.DBException.test(DBException.java:39)  第一堆栈仍然是throw new RuntimeException("hh")
at com.xxx.config.exception.DBException.main(DBException.java:29)
Caused by: java.lang.ArithmeticException: / by zero
at com.xxx.config.exception.DBException.test(DBException.java:37)   好在第一现场出现在Caused By中,但莫名其妙堆栈变长了,不利于查看
... 1 more

 

msg遗失,但仍可在Caused By中,找到堆栈第一现场

 

    private static void test() {
        try {
            int i = 1 / 0;
        } catch (Exception e) {
            throw e;
        }
    }

  

java.lang.ArithmeticException: / by zero
at com.xxx.config.exception.DBException.test(DBException.java:37)  第一堆栈为1/0
at com.xxx.config.exception.DBException.main(DBException.java:29)

 

msg原汁原味,堆栈第一现场在第一行

 

实践中

1)优先直接抛原始异常

2)若就是需要封装原始异常,务必将原始异常e传入封装异常,否则遭到堆栈第一现场遗失

posted on 2020-06-26 15:21  silyvin  阅读(336)  评论(0编辑  收藏  举报