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 >

< 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 >

实时控制log4j日志输出级别-Log4J日志级别控制中心

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