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| 1 | +#怎么样将堆栈追踪信息转换为字符串类型 |
| 2 | +##问题 |
| 3 | +将`Throwable.getStackTrace()`的结果转换为一个字符串来来描述堆栈信息的最简单的方法是什么 |
| 4 | + |
| 5 | + |
| 6 | +###最佳答案 |
| 7 | +可以用下面的方法将异常堆栈信息转换为字符串类型。该类在Apache commons-lang-2.2.jar中可以找到: |
| 8 | +[`org.apache.commons.lang.exception.ExceptionUtils.getStackTrace(Throwable)`](org.apache.commons.lang.exception.ExceptionUtils.getStackTrace\(Throwable\)) |
| 9 | + |
| 10 | +###答案二 |
| 11 | +用 [`Throwable.printStackTrace(PrintWriter pw)`](https://docs.oracle.com/javase/8/docs/api/java/lang/Throwable.html#printStackTrace-java.io.PrintWriter-)将对堆栈信息发送到一个输出中: |
| 12 | +````java |
| 13 | +StringWriter sw = new StringWriter(); |
| 14 | +PrintWriter pw = new PrintWriter(sw); |
| 15 | +t.printStackTrace(pw); |
| 16 | +sw.toString(); // stack trace as a string |
| 17 | +```` |
| 18 | + |
| 19 | +###答案三 |
| 20 | +````java |
| 21 | +StringWriter sw = new StringWriter(); |
| 22 | +e.printStackTrace(new PrintWriter(sw)); |
| 23 | +String exceptionAsString = sw.toString(); |
| 24 | +```` |
| 25 | + |
| 26 | +###答案四 |
| 27 | +````java |
| 28 | +public String stackTraceToString(Throwable e) { |
| 29 | + StringBuilder sb = new StringBuilder(); |
| 30 | + for (StackTraceElement element : e.getStackTrace()) { |
| 31 | + sb.append(element.toString()); |
| 32 | + sb.append("\n"); |
| 33 | + } |
| 34 | + return sb.toString(); |
| 35 | +} |
| 36 | +```` |
| 37 | + |
| 38 | +stackoverflow链接: |
| 39 | +http://stackoverflow.com/questions/1149703/how-can-i-convert-a-stack-trace-to-a-string |
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