log4j 日志文件路径

servlet:

 1 package com.charmyin.test;
 2 
 3 import java.io.IOException;
 4 
 5 import javax.servlet.ServletConfig;
 6 import javax.servlet.ServletException;
 7 import javax.servlet.annotation.WebServlet;
 8 import javax.servlet.http.HttpServlet;
 9 import javax.servlet.http.HttpServletRequest;
10 import javax.servlet.http.HttpServletResponse;
11 
12 import org.apache.log4j.PropertyConfigurator;
13 
14 public class Log4jInitServlet extends HttpServlet {
15     private static final long serialVersionUID = 1L;
16 
17     private final String WEB_APP_ROOT_DEFAULT = "webapp.root";
18 
19     public void init() throws ServletException {
20         String prefix = getServletContext().getRealPath("/");
21         // System.setProperty("webapp.root", prefix);
22         String webAppRootKey = getServletConfig().getInitParameter(
23                 "webAppRootKey");
24         System.out.println(webAppRootKey);
25         if (webAppRootKey == null || webAppRootKey.length() < 1) {
26             webAppRootKey = WEB_APP_ROOT_DEFAULT;
27         }
28         System.setProperty(webAppRootKey, prefix);
29 
30         String propfile = getServletConfig().getInitParameter(
31                 "log4j-configuration");
32         System.out.println(propfile);
33         if (propfile != null) {
34             PropertyConfigurator.configure(prefix + propfile);
35             System.out.println("Log4J Configured.");
36         }
37     }
38 
39     protected void doGet(HttpServletRequest request,
40             HttpServletResponse response) throws ServletException, IOException {
41         // TODO Method stub generated by Lomboz
42     }
43 
44     protected void doPost(HttpServletRequest request,
45             HttpServletResponse response) throws ServletException, IOException {
46         // TODO Method stub generated by Lomboz
47     }
48 }

web.xml:

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
 3   <display-name>http</display-name>
 4   <servlet>
 5     <servlet-name>Log4jInit</servlet-name>
 6     <servlet-class>com.charmyin.test.Log4jInitServlet</servlet-class>
 7     <init-param>
 8       <param-name>log4j-configuration</param-name>
 9       <param-value>/WEB-INF/log4j.properties</param-value>
10     </init-param>
11     <init-param>
12       <param-name>webAppRootKey</param-name>
13       <param-value>webapp.root</param-value>
14     </init-param>
15     <load-on-startup>0</load-on-startup>
16   </servlet>
17   <welcome-file-list>
18     <welcome-file>index.html</welcome-file>
19     <welcome-file>index.htm</welcome-file>
20     <welcome-file>index.jsp</welcome-file>
21     <welcome-file>default.html</welcome-file>
22     <welcome-file>default.htm</welcome-file>
23     <welcome-file>default.jsp</welcome-file>
24   </welcome-file-list>
25 </web-app>

log4j.properties:

 1 # initialise root logger with level DEBUG 
 2 log4j.rootLogger=DEBUG, CONSOLE, LOGFILE
 3 log4j.logger.com.mchange=OFF  
 4 
 5 #log4j.appender.stdout = org.apache.log4j.ConsoleAppender
 6 #log4j.appender.stdout.Target = System.out
 7 #log4j.appender.stdout.Threshold=ALL 
 8 #log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
 9 #log4j.appender.stdout.layout.ConversionPattern =[%-6p] [%d{yyyy-MM-dd HH/:mm/:ss}]%-5p %c(line/:%L) %x-%m%n
10 
11 #u8F93u51FAu5230u63A7u5236u53F0
12 log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender 
13 log4j.appender.CONSOLE.Threshold=DEBUG 
14 log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout 
15 log4j.appender.CONSOLE.layout.ConversionPattern=[%-6p] %d{yyyy-MM-dd HH:mm:ss,SSS} %l%n %m%n
16 
17 #u8F93u51FAu5230u6587u4EF6
18 log4j.appender.LOGFILE=org.apache.log4j.DailyRollingFileAppender 
19 log4j.appender.LOGFILE.DatePattern='.'yyyy-MM-dd'.log'
20 log4j.appender.LOGFILE.Append=true
21 log4j.appender.LOGFILE.Threshold=DEBUG
22 log4j.appender.LOGFILE.File=${webapp.root}/http.log
23 log4j.appender.LOGFILE.layout=org.apache.log4j.PatternLayout
24 log4j.appender.LOGFILE.layout.ConversionPattern= [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method: %l%n %m%n