ExceptionのStackTraceを文字列で取得する

gistfile1.java

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