以下示例显示如何使用spring web mvc框架集成log4j。首先使用eclipse ide，并按照以下步骤使用spring web framework开发基于动态表单的web应用程序：
com.h3.springmvc 包下创建一个java类：hellocontroller 。classpath中。src文件夹下创建一个 log4j.properties 文件。完整的项目文件目录结构如下所示 -
hellocontroller.java 的代码如下所示 -
package com.h3.springmvc;
import org.apache.log4j.logger;
import org.springframework.stereotype.controller;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.requestmethod;
import org.springframework.ui.modelmap;
@controller
@requestmapping("/hello")
public class hellocontroller{
private static final logger logger = logger.getlogger(hellocontroller.class);
@requestmapping(method = requestmethod.get)
public string printhello(modelmap model) {
logger.info("printhello started.");
//logs debug message
if(logger.isdebugenabled()){
logger.debug("inside: printhello");
}
//logs exception
logger.error("logging a sample exception", new exception("testing"));
model.addattribute("message", "hello spring mvc framework!");
logger.info("printhello ended.");
return "hello";
}
}
log4j.properties 的代码如下所示 -
# root logger option
log4j.rootlogger=debug, stdout, file
# redirect log messages to console
log4j.appender.stdout=org.apache.log4j.consoleappender
log4j.appender.stdout.target=system.out
log4j.appender.stdout.layout=org.apache.log4j.patternlayout
log4j.appender.stdout.layout.conversionpattern=%d{yyyy-mm-dd hh:mm:ss} %-5p %c{1}:%l - %m%n
# redirect log messages to a log file
log4j.appender.file=org.apache.log4j.rollingfileappender
#outputs to tomcat home
log4j.appender.file.file=${catalina.home}/logs/myapp.log
log4j.appender.file.maxfilesize=5mb
log4j.appender.file.maxbackupindex=10
log4j.appender.file.layout=org.apache.log4j.patternlayout
log4j.appender.file.layout.conversionpattern=%d{yyyy-mm-dd hh:mm:ss} %-5p %c{1}:%l - %m%n
integratelog4j-servlet.xml 配置如下所示 -
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemalocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<context:component-scan base-package="com.h3.springmvc" />
<bean class="org.springframework.web.servlet.view.internalresourceviewresolver">
<property name="prefix" value="/web-inf/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
hello.jsp 文件中的配置如下所示 -
<%@ page contenttype="text/html; charset=utf-8" %>
<html>
<head>
<title>hello world</title>
</head>
<body>
<h2>${message}</h2>
</body>
</html>
在上面的代码中，已经在tomcat控制台中配置了log4j，用它来记录日志详细信息，并且在 tomcat 目录下将日志文件保存为：myapp.log。
完成创建源和配置文件后，发布应用程序到tomcat服务器。
现在启动tomcat服务器，当访问url => http://localhost:8080/integratelog4j/hello ， 如果spring web应用程序没有问题，应该看到以下结果：
