spring2在web下对log4j的增强
废话 不多讲 看源码 ~！
web.xml配置文件
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <!-- <context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/applicationContext.xml</param-value> </context-param> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> --> <context-param> <param-name>log4jConfigLocation</param-name> <param-value>WEB-INF/log4j.properties</param-value> </context-param> <context-param> <param-name>log4jRefreshInterval</param-name> <param-value>60000</param-value> </context-param> <listener> <listener-class> org.springframework.web.util.Log4jConfigListener </listener-class> </listener> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
log4的配置文件
log4j.rootLogger=ERROR,CONSOLE,ROLLING_FILE #INFO,CONSOLE,ROLLING_FILE #ERROR,ROLLING_FILE ################### # Console Appender ################### log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender log4j.appender.Threshold=INFO log4j.appender.CONSOLE.Target=System.out log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout log4j.appender.CONSOLE.layout.ConversionPattern= [%p] %d %c - %m%n ######################## # Rolling File ######################## log4j.appender.ROLLING_FILE=org.apache.log4j.RollingFileAppender log4j.appender.ROLLING_FILE.Threshold=INFO log4j.appender.ROLLING_FILE.File=d:/springaop1xdemo.log log4j.appender.ROLLING_FILE.Append=true log4j.appender.ROLLING_FILE.MaxFileSize=5000KB log4j.appender.ROLLING_FILE.MaxBackupIndex=2 log4j.appender.ROLLING_FILE.layout=org.apache.log4j.PatternLayout log4j.appender.ROLLING_FILE.layout.ConversionPattern=[%p] %d %c - %m%n
测试类
package test;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class Test {
protected static final Log log = LogFactory.getLog(Test.class);
public String sayHello(){
log.info("info hello");
log.debug("debug hello");
log.error("error hello");
return "HelloWorld";
}
}
web测试页面
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
This is my JSP page. <br>
<%
test.Test tt = new test.Test();
out.print(tt.sayHello());
%>
</body>
</html>
有人要问了 为什么要这么复杂
有什么不同~？
最好的一点就是可以改变记录级别和策略，不需要重启Web应用
这样在发布之后去查找错误非常有利
可以将log4j.properties和其他properties统一放在/WEB-INF/下
便于管理
下面是一个测试工程 在myeclipse6.0GA下通过~！