java使用log4jweb在web应用程序中配置Log4j2。罐子
我试图通过以下教程在我的Web应用程序中配置log4j2。我正在使用glassfish 4.1.1服务器和servlet版本3.1。我可以通过以下配置配置日志功能:
log4j。属性
# Root logger option
log4j.rootLogger=INFO, consoleAppender, fileAppender
# debug level logger
log4j.logger.kumar.suraj.college.administration.login=DEBUG
# Redirect log messages to console
log4j.appender.consoleAppender=org.apache.log4j.ConsoleAppender
log4j.appender.consoleAppender.Target=System.out
log4j.appender.consoleAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.consoleAppender.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
# Redirect log messages to a log file, support file rolling.
log4j.appender.fileAppender=org.apache.log4j.DailyRollingFileAppender
log4j.appender.fileAppender.File=E:\\DEVELOPMENT\\JAVA\\web-logs\\web-college-administration\\applicationLogs.log
log4j.appender.fileAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.fileAppender.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
属性文件放在src/main/resources文件夹中
网络。xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>College Administration</display-name>
<!-- <context-param>
<param-name>log4jConfiguration</param-name>
<param-value>/log4j.properties</param-value>
</context-param>is it required
-->
<!--from where is this class referenced in dependency without web -->
<listener>
<listener-class>org.apache.logging.log4j.web.Log4jServletContextListener</listener-class>
</listener>
<servlet>
<servlet-name>loginServlet</servlet-name>
<servlet-class>kumar.suraj.college.administration.login.LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>loginServlet</servlet-name>
<url-pattern>/login</url-pattern>
</servlet-mapping>
</web-app>
定义文件位置的上下文参数被注释掉。log4j在默认情况下可能会查找名为log4j的文件。财产。不过,我只是想知道指定文件位置的方法是否正确
我也不确定哪个罐子是org。阿帕奇。登录中。log4j。网状物正在引用Log4jServletContextListener。我搜索了所有jar文件,但找不到这个类
LoginServlet。爪哇
package kumar.suraj.college.administration.login;
import java.io.IOException;
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 kumar.suraj.college.administration.adduser.AddUserServlet;
public class LoginServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
// final static Logger logger = LogManager.getLogger(LoginServlet.class);
final static Logger logger = Logger.getLogger(LoginServlet.class);
public LoginServlet() {
super();
}
@Override
protected void doGet(final HttpServletRequest request, final HttpServletResponse response)
throws ServletException, IOException {
LoginServlet.logger.debug("debug level logging supported"); response.getWriter().append("Servedat:").append(request.getContextPath());
response.getWriter().append("Hello Suraj");
}
@Override
protected void doPost(final HttpServletRequest request, final HttpServletResponse response) throws ServletException, IOException {
LoginServlet.logger.debug("debug level logging supported");
this.doGet(request, response);
}
}
波姆。log4j的xml依赖关系
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
所有这些都很好,我在控制台和文件中都有日志。但当我尝试按照以下链接更改配置时:
https://logging.apache.org/log4j/2.x/manual/webapp.html#Servlet-3.0 https://logging.apache.org/log4j/2.x/maven-artifacts.html
就像我切换到之前指定的依赖项,而不是依赖项
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-web</artifactId>
<version>2.6.2</version>
</dependency>
log4j api和log4j core是作为log4j web的可传递依赖项添加的。罐子
我在LoginServlet中做的其他更改。java是因为我在切换到log4j web后遇到编译时错误。罐子,如下所示:
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
public class LoginServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
final static Logger logger = LogManager.getLogger(LoginServlet.class);
// final static Logger logger = Logger.getLogger(LoginServlet.class);
主要的变化是logger变量的初始化和两个导入。rest所有配置保持原样。我还能够找到web中指定的侦听器类。log4jweb中的xml。在这种情况下是罐子。仍然无法使用此配置进行日志记录
谁能帮我一下,或者告诉我我做错了什么
# 1 楼答案
好的,在对我之前提到的链接进行了更多的研究和重新阅读之后,我终于在我的web应用程序中配置了log4j2,现在我得到了预期的日志。现在我想提一下我做错了什么
如链接https://logging.apache.org/log4j/2.x/manual/webapp.html所述
如果我使用servlet 3.0或更高版本,我不需要在部署描述符中注册Log4jServletContextListener类,它只需要在servlet 2.5或更低版本中注册。此外,如果遵守log4j2的命名约定,则不需要提供文件位置
另一个改变,而不是log4j2。属性现在我使用的是log4j2。log4j2中属性文件的xml格式与log4j1中使用的格式不同。感谢下面链接中给出的答案,帮助我解决了这个问题Log4j 2 doesn't support log4j.properties file anymore?
有关当前支持的格式,请参阅链接https://logging.apache.org/log4j/2.0/manual/configuration.html#Properties
下面是我的部署描述符和log4j配置文件现在的样子:
网络。xml
log4j2。xml