做的java开发的时候，经常会遇到代码抛异常后，需要把异常信息保存到数据库或者上传到云服务器做缓存分析。这时候就需要获取异常的堆栈信息（详细错误信息）。
人有的用e.getMessage()来电子杂志异常信息，但是这样获取到的信息内容并不全，而且有时候为空。我们可以用下面方法来获取。
public static String getStackTrace(Throwable throwable)
{
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
try
{
throwable.printStackTrace(pw);
return sw.toString();
} finally
{
pw.close();
}
}使用也很简单：
public static void test()
{
try
{
int i = 0;
int m = 10 / i;
} catch (Exception e)
{
System.out.println(e.getMessage());
System.out.println("------调皮的分割线------");
System.out.println(ExceptionUtil.getStackTrace(e));
}
}也可以放在request中：
request.setAttribute（“errorCode1”，getStackTrace（e））;
logger.error（e.getMessage（），e）;
我们看下打印结果：
以下是项目中配置的相关信息：
1、在web.xml中添加拦截器：在执行方法前后拦截，如果出现异常捕获并放入request中
<filter>
<filter-name>initContextFilter</filter-name>
<filter-class>
com.hys.framework.web.filter.InitContextFilter
</filter-class>
<init-param>
<param-name>RequestEncoding</param-name>
<param-value>utf-8</param-value>
</init-param>
<init-param>
<param-name>ResponseEncoding</param-name>
<param-value>utf-8</param-value>
</init-param>
<init-param>
<param-name>FailureForwardName</param-name>
<param-value>/commons/failure.jsp</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>initContextFilter</filter-name>
<url-pattern>*.do</url-pattern>
</filter-mapping>2、拦截器类（稍后添加）
3、异常错误页面：fail.jsp
<%@ page contentType="text/html;charset=utf-8"%>
<!DOCTYPE HTML>
<html>
<head>
<%@ include file="/commons/taglibs.jsp"%>
<title>Failure</title>
<link href="${ctx}/css/style1.css" type=text/css rel=stylesheet>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script type="text/javascript">
function forback()
{
if(window.history.length==0)
{
window.close();
}
else
{
window.history.back();
}
}
</script>
<style type="text/css">
#Error {
COLOR: #B22222;
FONT-SIZE: 14px;
}
</style>
</head>
<body leftmargin="0" topmargin="0" class="body1">
<center>
<TABLE width="100%" height="600" border="0" cellPadding="0"
cellSpacing="0">
<tr>
<td align="center">
<table width="70%" border="0" cellpadding="1" cellspacing="0"
bordercolor="#BDC7D6" bgcolor="#BDC7D6">
<tr>
<td>
<table width="100%" border="0" cellpadding="0" cellspacing="0"
bordercolor="#BDC7D6" bgcolor="#FFFFFF" class="lankuang1">
<tr>
<td height="25" align="left" valign="middle"
bgcolor="#EFF3F7" class="lanbottom">
<strong style="color: #5F9EA0">报错提醒：${ErrorMsg }</strong>
</td>
</tr>
<tr>
<td height="120" align="center">
<table width="90%" border="0" cellspacing="0"
cellpadding="0">
<tr>
<td width="73%" align="left" valign="middle">
<span onclick="showError()" style="cursor:pointer">出错了，请联系管理员！</span>
</td>
</tr>
<tr>
<td colspan="2" align="center">
<input type="button" name="forward" value="返回 "
class="but2" onClick="forback();">
</td>
</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
</TABLE>
</center>
<div style="display:none" id="errorcode">
<span id="Error">信息：${msg }</span>
<br/>
---------------------------------
堆栈:
${stack }
-----------
</div>
</body>
<script type="text/javascript">
function showError(){
document.getElementById("errorcode").style.display="block";
}
</script>
</html>最后效果：
