java Exception 出错的栈信息打印到日志中 打印堆栈信息

public static String errInfo(Exception e) {
StringWriter sw = null;
PrintWriter pw = null;
try {
sw = new StringWriter();
pw = new PrintWriter(sw);
// 将出错的栈信息输出到printWriter中
e.printStackTrace(pw);
pw.flush();
sw.flush();
} finally {
if (sw != null) {
try {
sw.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}
if (pw != null) {
pw.close();
}
}
return sw.toString();
}

e.getMessage(); 只会获得具体的异常名称. 比如说NullPoint 空指针,就告诉你说是空指针...

e.printStackTrace();会打出详细异常,异常名称,出错位置,便于调试用..