转自：http://blog.csdn.net/long95wang/article/details/8089489

方法一：

public static String getExceptionAllinformation(Exception ex){
String sOut = “”;
StackTraceElement[] trace = ex.getStackTrace();
for (StackTraceElement s : trace) {
sOut += “\tat ” + s + “\r\n”;
}
return sOut;
}

方法二：

public static String getExceptionAllinformation_01(Exception ex) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
PrintStream pout = new PrintStream(out);
ex.printStackTrace(pout);
String ret = new String(out.toByteArray());
pout.close();
try {
out.close();
} catch (Exception e) {
}
return ret;
}

方法三：

private static String toString_02(Throwable e){
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw, true);
        e.printStackTrace(pw);
        pw.flush();
        sw.flush();
        return sw.toString();
}