关于log4f日志的使用（spring+maven）

首先在web.xml里面配置

</dependency>

接着创建log4j.properties配置文件和Log4JInitServlet.java初始化文件

log4j.properties

### set log levels ###
##log4j.rootLogger = debug , stdout , D , E
#log4j.rootLogger = debug , stdout , D
log4j.rootLogger = debug, console , D , E

### output to the console ###
log4j.appender.console = org.apache.log4j.ConsoleAppender
log4j.appender.console.Target = System.out
log4j.appender.console.layout = org.apache.log4j.PatternLayout
log4j.appender.console.Append = true
log4j.appender.console.Threshold = INFO
#log4j.appender.stdout.layout.ConversionPattern = %d{ABSOLUTE} %5p %c{ 1 }:%L - %m%n
log4j.appender.console.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} [%c]-[%p] %m%n

### Output to the log file ###
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
###log4j.appender.D.File = ${springmvc.root}/WEB-INF/logs/log.log
log4j.appender.D.File = E:/log/log.log
log4j.appender.D.Append = true
log4j.appender.D.Threshold = DEBUG
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.dailyFile=org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.dailyFile.DatePattern='.'yyyy-MM-dd'.log'
log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} [ %t:%r ] - [ %p ] %m%n

### Save exception information to separate file ###
log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
###log4j.appender.E.File = ${springmvc.root}/WEB-INF/logs/error.log
log4j.appender.E.File = E:/log/error.log
log4j.appender.E.Append = true
log4j.appender.E.Threshold = ERROR
log4j.appender.E.layout = org.apache.log4j.PatternLayout
log4j.appender.E.dailyFile=org.apache.log4j.DailyRollingFileAppender
log4j.appender.E.dailyFile.DatePattern='.'yyyy-MM-dd'.log'

log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} [ %t:%r ] - [ %p ] %m%n

注：

首先，log4f输出从低到高分为debug,info,warn,error,fatal这5个级别

log4j.rootLogger这个是总的概括，最多可以有4个参数，第一个参数（debug）表示全局最低输出（若这里设置了warn，则不管你下面的怎么设置，debug和info都不会输出，建议这里都设置成debug，细分的可以在下面输出）。第二个到第四个参数是下面的设置的参数名（比如console 即log4j.appender.console最后的console），只要保证与下面的一样即可，最多可以设置3个参数。

org.apache.log4j.ConsoleAppender表示控制台输出

org.apache.log4j.DailyRollingFileAppender 表示每天生产的文件，到第二天他会自动改名成log.log.2018-05-16

log4j.appender.E.File 表示日志输出的路径

log4j.appender.D.Append =true表示日志输出是追加，不是覆盖

log4j.appender.D.Threshold = DEBUG 表示这个类的最低输出级别

log4j.appender.E.layout = org.apache.log4j.PatternLayout

log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} [ %t:%r ] - [ %p ] %m%n

表示输出的格式

Log4JInitServlet.java

package com.sunyard.insurance.Servlet;

import java.io.File;
import java.io.IOException;

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.PropertyConfigurator;

/**
* Servlet implementation class Log4JInitServlet
*/
@WebServlet("/Log4JInitServlet")
public class Log4JInitServlet extends HttpServlet {
private static final long serialVersionUID = 1L;

/**
* @see HttpServlet#HttpServlet()
*/
public Log4JInitServlet() {
super();
// TODO Auto-generated constructor stub
}

/**
* @see Servlet#init(ServletConfig)
*/
public void init(ServletConfig config) throws ServletException {
System.out.println("Log4JInitServlet 正在初始化 log4j日志设置信息");
String log4jLocation = config.getInitParameter("log4j-properties-location");
ServletContext sc = config.getServletContext();
if (log4jLocation == null) {
System.err.println("*** 没有 log4j-properties-location 初始化的文件, 所以使用 BasicConfigurator初始化");
BasicConfigurator.configure();
} else {
String webAppPath = sc.getRealPath("/");
String log4jProp = webAppPath + log4jLocation;
File yoMamaYesThisSaysYoMama = new File(log4jProp);
if (yoMamaYesThisSaysYoMama.exists()) {
System.out.println("使用: " + log4jProp+"初始化日志设置信息");
PropertyConfigurator.configure(log4jProp);
} else {
System.err.println("*** " + log4jProp + " 文件没有找到，所以使用 BasicConfigurator初始化");
BasicConfigurator.configure();
}
}
super.init(config);
}

/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
}

接着配置web.xml

<servlet>
<servlet-name>Log4JInitServlet</servlet-name>
<servlet-class>com.sunyard.insurance.Servlet.Log4JInitServlet</servlet-class>
<init-param>
<param-name>log4j-properties-location</param-name>
<param-value>WEB-INF/classes/conf/log4j.properties</param-value>
</init-param>
<load-on-startup>1</load-on-startup>

</servlet>

关于log4f日志的使用（spring+maven）

猜你喜欢