Struts,Spring,Hibernate Web应用开发2

 

本文摘自：http://www.blogjava.net/jacky9881/archive/2008/01/02/172086.html

 

 

1．我们已经搭建完了基本框架，接下来加入日志功能，只需修改原来的web.xml，增加一些配置信息：

 1<!--通知Spring Log4j配置文件的位置 -->
 2<context-param>
 3    <param-name>log4jConfigLocation</param-name>
 4    <param-value>/WEB-INF/log4j.properties</param-value>
 5</context-param>
 6 
 7<!--Spring默认刷新Log4j配置文件的间隔,单位为millisecond-->
 8<context-param>
 9    <param-name>log4jRefreshInterval</param-name>
10    <param-value>60000</param-value>
11</context-param>
12 
13<!--在应用启动时，由Spring负责加载Log4j-->
14<listener>
15    <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
16</listener>

 

 

2．接下来我们定义log4j.properties

 

 1# Global logging configuration
 2log4j.rootLogger=DEBUG,console,file
 3 
 4## APPENDERS ##
 5# define an appender named console, which is set to be a ConsoleAppender
 6log4j.appender.console=org.apache.log4j.ConsoleAppender
 7 
 8# define an appender named file, which is set to be a RollingFileAppender
 9log4j.appender.file=org.apache.log4j.RollingFileAppender
10# replace <CATALINA_HOME> with your true path
11log4j.appender.file.File=D:/eclipse/workspace/login/log.txt
12 
13## LAYOUTS ##
14# assign a SimpleLayout to console appender
15log4j.appender.console.layout=org.apache.log4j.SimpleLayout
16 
17# assign a PatternLayout to file appender
18log4j.appender.file.layout=org.apache.log4j.PatternLayout
19log4j.appender.file.layout.ConversionPattern=%t%p-%m%n

 

 

在log4j.properties中，我们定义了日志级别是DEBUG,日志信息输出目的地是控制台（console）和文件（file）。

3．这样我们就可以在程序代码中进行日志操作了：

 1package test.register.action;
 2 
 3import javax.servlet.http.HttpServletRequest;
 4import javax.servlet.http.HttpServletResponse;
 5 
 6import org.apache.log4j.LogManager;
 7import org.apache.log4j.Logger;
 8import org.apache.struts.action.Action;
 9import org.apache.struts.action.ActionForm;
10import org.apache.struts.action.ActionForward;
11import org.apache.struts.action.ActionMapping;
12import org.apache.struts.action.DynaActionForm;
13 
14import test.register.entity.Register;
15import test.register.service.RegisterService;
16 
17public class RegisterAction extends Action{
18       
19       private static final Logger log = LogManager.getLogger(RegisterAction.class);
20       
21       private RegisterService registerService;
22 
23       public RegisterService getRegisterService() {
24              return registerService;
25       }
26 
27       public void setRegisterService(RegisterService registerService) {
28              this.registerService = registerService;
29       }
30 
31       public ActionForward execute(ActionMapping mapping,
32                                                               ActionForm form, 
33                                                 HttpServletRequest request, 
34                                    HttpServletResponse response) 
35       throws Exception {
36              log.info("save register");
37              Register r = (Register)((DynaActionForm)form).get("register"); 
38              getRegisterService().saveRegister(r);           
39              return mapping.findForward("success");
40       }     
41       
42}

 

 

4．在上面log4j.properties中，我们指定日志输入文件用了绝对路径，这在很多时候不方便，为此我们作如下修改：在web.xml中增加一个上下文参数

1<context-param>
2    <param-name>webAppRootKey</param-name>
3    <param-value>webLogin.root</param-value>
4</context-param>

 

 

增加系统变量，变量名为webAppRootKey，变量值可以指定应用部署的目录，这样就可以在log4j.properties对日志输出的文件路径作如下修改：

log4j.appender.file.File=${webLogin.root}/log.txt