8/16/2006

Save Exception StackTrace to a String

How to convert the stacktrace of an exception to string? Sometimes I need to save it as a string so I can fit it into certain API. The following is how I would do it. The resulted string contains the same information you would normally see when the stacktrace is printed. All nested causal exceptions should also be included.

public String stackTraceToString(Throwable e) {
String retValue = null;
StringWriter sw = null;
PrintWriter pw = null;
try {
sw = new StringWriter();
pw = new PrintWriter(sw);
e.printStackTrace(pw);
retValue = sw.toString();
} finally {
try {
if(pw != null) pw.close();
if(sw != null) sw.close();
} catch (IOException ignore) {}
}
return retValue;
}

5 comments:

Andres Almiray said...

Technically the call for
if(sw != null) sw.close();
is unnecesary, as pw decorates sw, so when
pw is closed, so is sw too.

Anonymous said...

See commons lang
http://jakarta.apache.org/commons/lang

ExceptionUtils
http://jakarta.apache.org/commons/lang/api-release/org/apache/commons/lang/exception/ExceptionUtils.html#getStackTrace(java.lang.Throwable)

Anonymous said...

public static String getException(Exception e )
{
StringWriter w = new StringWriter();
e.printStackTrace(new PrintWriter(w));
return w.toString();
}

JSnapshot Team said...

You could find that having just a stack trace is not enough to find the reason why exception occurs.
In this case try to use JSnapshot (http://jsnapshot.com).
JSnapshot is an advanced java exception logging, monitoring and analysis tool. It traces thrown exceptions in real-time and logs a snapshot of call stack, variables and objects for every thrown exception. With this tool, you can examine all of the exception details as if the application was stopped at the breakpoint in the debugger when exception happened. And it's integrated with Eclipse IDE.

Anna said...

Great and Useful Article.

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