方法一:将日志文件输出到tomcat自身的日志文件夹logs中
- # Set root category priority to info and its only appender to console.
- log4j.rootCategory=info,console,R
- #log4j.debug=true
-
- # console is set to be a ConsoleAppender using a PatternLayout.
- log4j.appender.console=org.apache.log4j.ConsoleAppender
- log4j.appender.console.Threshold=info
- log4j.appender.console.layout=org.apache.log4j.PatternLayout
- log4j.appender.console.layout.ConversionPattern=- %m%n
-
- # R is set to be a File appender using a PatternLayout.
- log4j.appender.R=org.apache.log4j.RollingFileAppender
- log4j.appender.R.Append=true
- log4j.appender.R.Threshold=info
- log4j.appender.R.MaxFileSize=1024KB
- log4j.appender.R.MaxBackupIndex=10
- log4j.appender.R.File=../logs/abc.log
- log4j.appender.R.layout=org.apache.log4j.PatternLayout
- log4j.appender.R.layout.ConversionPattern=%-d{yyyy-MM-dd HH\:mm\:ss} [%c]-[%p] %m%n
方法二:将日志文件输出到自己程序WEB-INF\logs目录中
1、在web.xml配置一个servlet
- <servlet>
- <servlet-name>lo4jInit</servlet-name>
- <servlet-class>com.linder.util.log4j.init.Lo4jInit</servlet-class>
- <init-param>
- <param-name>log4j_init_path</param-name>
- <param-value>WEB-INF\classes\log4j.properties</param-value>
- </init-param>
- <init-param>
- <param-name>log4j_file_path</param-name>
- <param-value>WEB-INF\logs\</param-value>
- </init-param>
- <load-on-startup>0</load-on-startup>
- </servlet>
2、编写一个初始化log4j的Servlet
- package com.linder.util.log4j.init;
-
- import java.io.FileInputStream;
- import java.io.IOException;
- import java.util.Properties;
-
- import javax.servlet.ServletException;
- import javax.servlet.http.HttpServlet;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
-
- import org.apache.log4j.Logger;
- import org.apache.log4j.PropertyConfigurator;
-
-
- public class Lo4jInit extends HttpServlet {
-
- /**
- *
- */
- private static final long serialVersionUID = 1L;
- private static Logger logger=Logger.getLogger(Lo4jInit.class);
-
- public void init(){
- String path=this.getServletContext().getRealPath("/");
- String file=this.getInitParameter("log4j_init_path");
- String logFile=this.getInitParameter("log4j_file_path");
- if(file!=null)
- {
- Properties prop = new Properties();
- try{
- prop.load(new FileInputStream(path+file)); //加载log4j.properties
- prop.setProperty("log4j.appender.R.File", path+logFile+ prop.getProperty("log4j.appender.R.File")); //设置日志文件的输出路径
- PropertyConfigurator.configure(prop); //加载配置项
- }catch(Exception e)
- {
- logger.info("初始化log4j日志输入路径异常,请检查web.xml参数配置是否正常,异常发生在"+this.getClass().getName()+"类的public void init()方法,异常的愿意是:"+e.getMessage(), e.fillInStackTrace());
- }
- }
-
-
- }
- protected void service(HttpServletRequest request, HttpServletResponse response)
- throws ServletException, IOException {
-
- }
-
- }
3、log4j.properties的配置信息
- # Set root category priority to info and its only appender to console.
- log4j.rootCategory=info,console,R
- #log4j.debug=true
-
- # console is set to be a ConsoleAppender using a PatternLayout.
- log4j.appender.console=org.apache.log4j.ConsoleAppender
- log4j.appender.console.Threshold=info
- log4j.appender.console.layout=org.apache.log4j.PatternLayout
- log4j.appender.console.layout.ConversionPattern=- %m%n
-
- # R is set to be a File appender using a PatternLayout.
- log4j.appender.R=org.apache.log4j.RollingFileAppender
- log4j.appender.R.Append=true
- log4j.appender.R.Threshold=info
- log4j.appender.R.MaxFileSize=1024KB
- log4j.appender.R.MaxBackupIndex=10
- log4j.appender.R.File=abc.log
- log4j.appender.R.layout=org.apache.log4j.PatternLayout
- log4j.appender.R.layout.ConversionPattern=%-d{yyyy-MM-dd HH\:mm\:ss} [%c]-[%p] %m%n
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