java打印错误中的堆栈信息

java打印异常中的堆栈信息
Print the Stack Trace of the Exception to a String

    import java.io.PrintWriter;
    import java.io.StringWriter;
    public static String getStackTrace(Throwable t)
    {
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw, true);
        t.printStackTrace(pw);
        pw.flush();
        sw.flush();
        return sw.toString();
    }