实时控制log4j日记输出级别-Log4J日志级别控制中心
实时控制log4j日志输出级别-Log4J日志级别控制中心
动态控制Log4J日志级别，只需要一个JSP页面即可。log4jCtl.jsp如下
<%@ page language= "java" contentType ="text/html; charset=UTF-8"
pageEncoding="UTF-8" %>
<%@ page import="org.apache.log4j.*"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<c:set var="basePath" value="${pageContext.request.contextPath} "/>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd" >
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title> Log4J级别控制</title >
<style type="text/css" >
/* 超级链接样式 */
a{
text-decoration: none ;
}
a:link {text-decoration :none ;}
a:visited {text-decoration :none;}
a:hover {color : #F60; text-decoration: underline;}
a:active {text-decoration :underline;}
body {
font: normal 11px auto "Trebuchet MS", Verdana, Arial, Helvetica, sans-serif;
/*color: #4f6b72;
background: #E6EAE9; */
}
#log-table {
padding: 0 ;
margin: 5px 0 ;
}
tr{
background: #F5FAFA ;
}
tr:nth-child(2n) {
background: #fff ;
}
tr{
background-color: expression( (this.sectionRowIndex % 2 == 0) ? "#F5FAFA" : "#fff" );
}
td {
border-right: 1px solid #C1DAD7 ;
border-bottom: 1px solid #C1DAD7 ;
font-size:12px ;
padding: 6px 6px 6px 12px ;
/*color: #4f6b72; */
}
.left-border{
border-left: 1px solid #C1DAD7 ;
}
th {
font: bold 11px "Trebuchet MS", Verdana, Arial, Helvetica, sans-serif;
/*color: #4f6b72; */
border-right: 1px solid #C1DAD7 ;
border-bottom: 1px solid #C1DAD7 ;
border-top: 1px solid #C1DAD7 ;
letter-spacing: 2px ;
/*text-transform: uppercase; */
text-align: center ;
padding: 6px 6px 6px 12px ;
background: #CAE8EA ;
}
/*---------for IE 5.x bug*/
html> body td {
font-size:12px ;
}
</style>
</head>
<body>
<h1> Log4J日志级别控制中心 </h1>
<div>
显示 <a href=" ${basePath}/log4j.jsp?showAll=true"> 所有 Logger</a> | 显示<a href="${basePath} /log4j.jsp?showAll=false" >当前运行的Logger</a >
</div>
<%
String logName = request.getParameter( "log");
if (null != logName) {
Logger log = ( "".equals(logName) ? Logger.getRootLogger() : Logger.getLogger(logName));
log.setLevel(Level.toLevel(request.getParameter( "level"), Level.DEBUG));
}
%>
<c:set var="rootLogger" value="<%= Logger.getRootLogger() %>" />
<form>
<table id= "log-table" cellspacing ="0" >
<tr>
<th class="left-border" >Level</ th>
<th> Logger</th >
<th> Set New Level</th >
</tr>
<tr>
<td class="left-border" >${rootLogger.level}</ td>
<td> ${rootLogger.name}</td >
<td>
<c:forTokens var="level" delims="," items="ALL,TRACE,DEBUG,INFO,WARN,ERROR,FATAL,OFF" >
<a href=" ${basePath}/log4j.jsp?showAll=${param.showAll} &log=&level=${level}">${level}</ a> |
</c:forTokens>
</td>
</tr>
<c:forEach var="logger" items=" ${rootLogger.loggerRepository.currentLoggers}">
<c:if test=" ${!empty logger.level.syslogEquivalent || param.showAll} ">
<tr>
<c:if test=" ${!empty logger.level.syslogEquivalent}">
<td class="left-border" >${logger.level}</ td>
<td> ${logger.name}</td >
<td> <!-- 只有当前已经有实例的Log行能显示出来 -->
<c:forTokens var="level" delims="," items="ALL,TRACE,DEBUG,INFO,WARN,ERROR,FATAL,OFF" >
<a href=" ${basePath}/log4j.jsp?showAll=${param.showAll} &log=${logger.name}&level=${level}"> ${level}</a > |
</c:forTokens>
</td>
</c:if>
<c:if test=" ${empty logger.level.syslogEquivalent}">
<td class="left-border" >----</ td>
<td> ${logger.name}</td >
<td> 此Logger还未实例化运行 </td>
</c:if>
</tr>
</c:if>
</c:forEach>
</table>
</form>
<div>
显示 <a href=" ${basePath}/log4j.jsp?showAll=true"> 所有 Logger</a> | 显示<a href="${basePath} /log4j.jsp?showAll=false" >当前运行的Logger</a >
</div>
</body>
</html>