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.zyiz.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.zyiz.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=${catalina.home}/logs/myapp.log log4j.appender.file.MaxFileSize=5MB log4j.appender.file.MaxBackupIndex=10 log4j.appender.file.layout=org.apache.log4j.PatternLayout log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
IntegrateLog4j-servlet.xml 配置如下所示 -
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> <context:component-scan base-package="com.zyiz.springmvc" /> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> </beans>
hello.jsp 文件中的配置如下所示 -
<%@ page contentType="text/html; charset=UTF-8" %> <html> <head> <title>Hello World</title> </head> <body> <h2>${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: