Struts2+Log4j集成

# root logger option
log4j.rootlogger=error, 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, support rolling backup file.
log4j.appender.file=org.apache.log4j.rollingfileappender
log4j.appender.file.file=${catalina.home}/logs/mystruts2app.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

4. struts2 action 和 logging

一个简单的动作返回一个页面，并显示了如何来执行 log4j 消息日志记录。

welcomeaction.java

package com.h3.common.action;

import org.apache.log4j.logger;
import com.opensymphony.xwork2.actionsupport;

public class welcomeaction extends actionsupport {

	private static final long serialversionuid = 1l;

	//get log4j
	private static final logger logger = logger.getlogger(welcomeaction.class);

	public string execute() throws exception {

		// logs debug message
		if (logger.isdebugenabled()) {
			logger.debug("execute()!");
		}

		// logs exception
		logger.error("this is error message", new exception("testing"));

		return success;

	}
}

5. struts2配置

struts2 的配置和jsp页面，如果想了解的话。

struts.xml

<?xml version="1.0" encoding="utf-8" ?>
<!doctype struts public
"-//apache software foundation//dtd struts configuration 2.0//en"
"http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
	<constant name="struts.devmode" value="true" />

	<package name="welcome" namespace="/" extends="struts-default">

		<action name="welcome" class="com.h3.common.action.welcomeaction">
			<result name="success">pages/success.jsp</result>
		</action>

	</package>

</struts>

web.xml

<web-app xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"
	xsi:schemalocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	version="2.5">

	<display-name>struts 2 web application</display-name>

	<filter>
		<filter-name>struts2</filter-name>
		<filter-class>
			org.apache.struts2.dispatcher.ng.filter.strutsprepareandexecutefilter
		</filter-class>
	</filter>

	<filter-mapping>
		<filter-name>struts2</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

</web-app>

pages/success.jsp

<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
</head>
 
<body>
<h1>struts 2 + log4j integration example</h1>

</body>
</html>

6. 实例测试

运行struts 2的web应用程序，并访问welcome的动作。

在浏览器中打开 url : http://localhost:8888/struts2log4j/welcome

6.1 所有日志消息将显示在控制台中。

figure : eclipse 终端

6.2 此外，日志文件将在tomcat 的日志文件夹中被创建。

图片: c:\mystruts2app.log

下载代码 – http://pan.baidu.com/s/1nt7yvep

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