在java中打印异常消息 [英] Printing Exception Message in java

问题描述

当我尝试以下代码片段时：

  try {
 //语句
} catch（javax.script.ScriptException ex）{
 System.out.println ex.getMessage（））; 
} 
  

输出是：

 无效的JavaScript代码：sun.org.mozilla.javascript.internal.EvaluatorException：
 missing}属性列表（< Unknown source>）在< Unknown source> ; 
在行号1 
  

有没有办法打印消息没有异常信息，来源和行号信息。换句话说，我想在输出中打印的消息是：

  missing} after property list 
  

解决方案

输出对我来说是正确的：

$未知来源中的属性列表（<未知来源>）之后无效的JavaScript代码：sun.org.mozilla.javascript.internal.EvaluatorException：missing} after $< Unknown source> ;;在行号1

我认为无效的Javascript代码：.. 是异常消息的开始。

通常情况下不会返回堆栈跟踪信息：

 尝试{
抛出新的RuntimeException（hu？\\\
trace-line1\\\
trace-line2）; 
} catch（Exception e）{
 System.out.println（e.getMessage（））; //打印hu？ 
} 
  

所以也许您正在调用的代码捕获异常并重新启动一个 ScriptException 。在这种情况下，可能 e.getCause（）。getMessage（）可以帮助您。

Is there a way to print an exception message in Java without the exception?

When I try the following piece of code:

try {
    // statements
} catch (javax.script.ScriptException ex) {
    System.out.println(ex.getMessage());
}

The output is:

Invalid JavaScript code: sun.org.mozilla.javascript.internal.EvaluatorException:
missing } after property list (<Unknown source>) in <Unknown source>; 
at line number 1

Is there a way to print the message without the exception information, source and line number information. In other words, the message I would like to print in the output is:

missing } after property list

解决方案

The output looks correct to me:

Invalid JavaScript code: sun.org.mozilla.javascript.internal.EvaluatorException: missing } after property list (<Unknown source>) in <Unknown source>; at line number 1

I think Invalid Javascript code: .. is the start of the exception message.

Normally the stacktrace isn't returned with the message:

try {
    throw new RuntimeException("hu?\ntrace-line1\ntrace-line2");
} catch (Exception e) {
    System.out.println(e.getMessage()); // prints "hu?"
}

So maybe the code you are calling catches an exception and rethrows a ScriptException. In this case maybe e.getCause().getMessage() can help you.

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