e.printStackTrace() 을 String 으로 변환

/**

 * e.printStackTrace() 을 String 으로.

 * @param t

 * @return

 */

public static String makeStackTrace(Throwable t) {

if (t == null)

return "";

try {

ByteArrayOutputStream bout = new ByteArrayOutputStream();

t.printStackTrace(new PrintStream(bout));

bout.flush();

String error = new String(bout.toByteArray());

return error;

} catch (Exception ex) {

return "";

}

}