Convert an exception to a String with full stack trace : Exception « Development « Java Tutorial

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/**********************************************************************
Copyright (c) 2003 Andy Jefferson and others. All rights reserved. 
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
 

Contributors:
2003 Erik Bengtson - moved replaceAll from Column class to here
2004 Andy Jefferson - moved intArrayToString, booleanArrayToString from SM
2007 Xuan Baldauf - toJVMIDString hex fix
    ...
**********************************************************************/


import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.net.URLDecoder;
import java.util.Collection;
import java.util.Iterator;
import java.util.Properties;
import java.util.StringTokenizer;
import java.util.jar.JarFile;

/**
 * Utilities for String manipulation.
 *
 * @version $Revision: 1.23 $   
 **/
public class StringUtils
{
  /**
   * Convert an exception to a String with full stack trace
   * @param ex the exception
   * @return a String with the full stacktrace error text
   */
  public static String getStringFromStackTrace(Throwable ex)
  {
      if (ex==null)
      {
          return "";
      }
      StringWriter str = new StringWriter();
      PrintWriter writer = new PrintWriter(str);
      try
      {
          ex.printStackTrace(writer);
          return str.getBuffer().toString();
      }
      finally
      {
          try
          {
              str.close();
              writer.close();
          }
          catch (IOException e)
          {
              //ignore
          }
      }
  }
}