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log4j 超完美配置文件！
#【该配置为增加到多大量之后自动生产一个】
#可以设置级别：debug>info>error
#debug：显示debug、info、error
#info：显示info、error
#error：只error
#log4j.rootLogger=debug,appender1
#log4j.rootLogger=info,appender1
#####################可以取消注释
log4j.rootLogger=debug,appender1
#输出到文件(这里默认为追加方式)
#追加的意思重启时候是否重新在已有日志里面写入
log4j.appender.appender1=org.apache.log4j.RollingFileAppender
log4j.appender.appender1.Append =false
#设置文件输出路径
#【1】文本文件
log4j.appender.appender1.File=L:/log.log
#设置文件输出样式【自定义】
log4j.appender.appender1.layout=org.apache.log4j.PatternLayout
#自定义输出格式
log4j.appender.appender1.layout.ConversionPattern =[%d{yy/MM/dd HH:mm:ss:SSS}][%C-%M] %m%n
# %-d{yyyy-MM-dd HH:mm:ss} [ %t:%r ] - [ %p ] %m%n
##7 定义A2的输出文件的最大长度
log4j.appender.appender1.MaxFileSize = 2KB
##8 定义A2的备份文件数
log4j.appender.appender1.MaxBackupIndex=2
#【设置多久更新生成一个文件】
#可以设置级别：debug>info>error
#debug：显示debug、info、error
#info：显示info、error
#error：只error
#log4j.rootLogger=debug,appender1
#log4j.rootLogger=info,appender1
#####################可以取消注释
#log4j.rootLogger=debug,appender1
##输出到文件(这里默认为追加方式)
##追加的意思重启时候是否重新在已有日志里面写入
#log4j.appender.appender1=org.apache.log4j.DailyRollingFileAppender
#log4j.appender.appender1.Append =false
#
##设置文件输出路径
##【1】文本文件
#log4j.appender.appender1.File=L:/log.log
##设置文件输出样式【自定义】
#log4j.appender.appender1.layout=org.apache.log4j.PatternLayout
##自定义输出格式
#log4j.appender.appender1.layout.ConversionPattern =[%d{yy/MM/dd HH:mm:ss:SSS}][%C-%M] %m%n
## %-d{yyyy-MM-dd HH:mm:ss} [ %t:%r ] - [ %p ] %m%n
##定义时间多久生成一个文件
#log4j.appender.appender1.DatePattern = ‘_‘yyyy-MM-dd-HH-mm‘.log‘
#【文本形式】
#可以设置级别：debug>info>error
#debug：显示debug、info、error
#info：显示info、error
#error：只error
#log4j.rootLogger=debug,appender1
#log4j.rootLogger=info,appender1
#####################可以取消注释
#log4j.rootLogger=debug,appender1
#
##输出到文件(这里默认为追加方式)
##追加的意思重启时候是否重新在已有日志里面写入
#log4j.appender.appender1=org.apache.log4j.FileAppender
#log4j.appender.appender1.Append =true
#
##设置文件输出路径
##【1】文本文件
#log4j.appender.appender1.File=c:/Log4JDemo02.log
##设置文件输出样式
#log4j.appender.appender1.layout=org.apache.log4j.TTCCLayout
#【HTML形式】
#可以设置级别：debug>info>error
#debug：显示debug、info、error
#info：显示info、error
#error：只error
#log4j.rootLogger=debug,appender1
#log4j.rootLogger=info,appender1
#####################可以取消注释
#log4j.rootLogger=debug,appender1
##输出到文件(这里默认为追加方式)
##追加的意思重启时候是否重新在已有日志里面写入
#log4j.appender.appender1=org.apache.log4j.FileAppender
#log4j.appender.appender1.Append =true
##设置文件输出路径
##【2】HTML文件
#log4j.appender.appender1.File=c:/Log4JDemo02.html
##设置文件输出样式
#log4j.appender.appender1.layout=org.apache.log4j.HTMLLayout
#【备注】
#org.apache.log4j.HTMLLayout（以HTML表格形式布局），
#org.apache.log4j.PatternLayout（可以灵活地指定布局模式），
#org.apache.log4j.SimpleLayout（包含日志信息的级别和信息字符串），
#org.apache.log4j.TTCCLayout（包含日志产生的时间、线程、类别等等信息）
#%m 输出代码中指定的消息
#%p 输出优先级，即DEBUG，INFO，WARN，ERROR，FATAL
#%r 输出自应用启动到输出该log信息耗费的毫秒数
#%c 输出所属的类目，通常就是所在类的全名
#%t 输出产生该日志事件的线程名
#%n 输出一个回车换行符，Windows平台为“/r/n”，Unix平台为“/n”
#%d 输出日志时间点的日期或时间，默认格式为ISO8601，也可以在其后指定格式，比如：%d{yyy MMM dd HH:mm:ss , SSS}，输出类似：2002年10月18日 22 ： 10 ： 28 ， 921
#%l 输出日志事件的发生位置，包括类目名、发生的线程，以及在代码中的行数。举例：Testlog4.main(TestLog4.java: 10 )
为了更好，此博文更完美。。。
提供配置文件
web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" 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"> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>initLogger</servlet-name> <servlet-class>servlet.initLogger</servlet-class> <init-param> <param-name>log4j</param-name> <param-value>WEB-INF/log4j.properties</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>c</servlet-name> <servlet-class>servlet.c</servlet-class> </servlet> <servlet-mapping> <servlet-name>c</servlet-name> <url-pattern>/c</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
sevlet initLogger.java
package servlet;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.MalformedURLException;
import java.net.URISyntaxException;
import java.net.URL;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.log4j.PropertyConfigurator;
import util.dao;
public class initLogger extends HttpServlet {
/**
*
*/
private static final long serialVersionUID = 7010497166323512560L;
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request
* the request send by the client to the server
* @param response
* the response send by the server to the client
* @throws ServletException
* if an error occurred
* @throws IOException
* if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the GET method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to
* post.
*
* @param request
* the request send by the client to the server
* @param response
* the response send by the server to the client
* @throws ServletException
* if an error occurred
* @throws IOException
* if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the POST method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/*
* 通过上下文来取工程路径
*
* @return
*
* @throws Exception
*/
private String getAbsolutePathByContext() throws Exception {
String webPath = this.getServletContext().getRealPath("/");
webPath = webPath.replaceAll(
"[\\\\\\/]WEB-INF[\\\\\\/]classes[\\\\\\/]?", "/");
webPath = webPath.replaceAll("[\\\\\\/]+", "/");
webPath = webPath.replaceAll("%20", " ");
if (webPath.matches("^[a-zA-Z]:.*?$")) {
} else {
webPath = "/" + webPath;
}
webPath += "/";
webPath = webPath.replaceAll("[\\\\\\/]+", "/");
return webPath;
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException
* if an error occurs
*/
public void init() throws ServletException {
String webPath = null;
try {
webPath = getAbsolutePathByContext();
} catch (Exception e) {
}
// 在weblogic 11g 上可能无法从上下文取到工程物理路径，所以改为下面的
if (webPath == null) {
try {
webPath = getAbsolutePathByResource();
} catch (Exception e) {
e.printStackTrace();
}
}
if (webPath == null) {
try {
webPath = getAbsolutePathByResource();
} catch (Exception e) {
}
}
String prefix = webPath;
String file = this.getServletConfig().getInitParameter("log4j");
System.out.println("prefix = " + prefix);
String filePath = prefix + file;
System.out.println(filePath);
PropertyConfigurator.configure(filePath);
super.init();// 应用了struts,此方法不能省，ActionServlet覆盖了的此方法中有很多重要操作
}
private String getAbsolutePathByResource() throws MalformedURLException,
URISyntaxException {
URL url = this.getServletContext().getResource("/");
String path = new File(url.toURI()).getAbsolutePath();
if (!path.endsWith("\\") && !path.endsWith("/")) {
path += File.separator;
}
return path;
}
}
执行方法 c.servlet
package servlet;
import java.io.IOException;
import java.io.PrintWriter;
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 util.Bar;
public class c extends HttpServlet {
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
private static Logger logger = Logger.getLogger(c.class);
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
logger.info("不服你tm来打我啊！！！");
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the POST method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
}
ps： 新手注意
log4j.appender.appender1=org.apache.log4j.DailyRollingFileAppender
org.apache.log4j.DailyRollingFileAppender
log4j.appender.appender1=org.apache.log4j.FileAppender
他们的东西是不一样的，你指定的东西， 有些参数他才生效
我常说，比如、举例才能让话多一些说服力
我就举例
比如，你用了这个
log4j.appender.appender1=org.apache.log4j.FileAppender
这些是无效的。。。
##7 定义A2的输出文件的最大长度 log4j.appender.appender1.MaxFileSize = 2KB ##8 定义A2的备份文件数 log4j.appender.appender1.MaxBackupIndex=2
此文章是网上- -目前最全面的 粘贴可用。。。。不可用，IQ不行或者版本不对。2.0的版本不支持。。谢谢
log4j 超完美配置文件！
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