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📜  Spring MVC-集成LOG4J示例

📅  最后修改于: 2020-11-11 06:37:32             🧑  作者: Mango

以下示例显示了如何使用Spring Web MVC Framework集成LOG4J。首先，让我们拥有一个运行良好的Eclipse IDE，并遵循以下步骤使用Spring Web Framework开发基于动态表单的Web应用程序。

Step Description
1 Create a project with the name TestWeb under a package com.tutorialspoint as explained in the Spring MVC – Hello World chapter.
2 Create a Java class HelloController under the com.tutorialspointpackage.
3 Download the log4j library LOG4J from the maven repository page. Put it in your CLASSPATH.
4 Create a log4j.properties under the SRC folder.
5 The final step is to create the content of the source and configuration files and export the application as explained below.

HelloController.java

package com.tutorialspoint;

import org.apache.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.ui.ModelMap;

@Controller
@RequestMapping("/hello")
public class HelloController{
   private static final Logger LOGGER = Logger.getLogger(HelloController.class);
   @RequestMapping(method = RequestMethod.GET)
   public String printHello(ModelMap model) {
      LOGGER.info("printHello started.");

      //logs debug message
      if(LOGGER.isDebugEnabled()){
         LOGGER.debug("Inside:  printHello");
      }
      //logs exception
      LOGGER.error("Logging a sample exception", new Exception("Testing"));

      model.addAttribute("message", "Hello Spring MVC Framework!");
      LOGGER.info("printHello ended.");
      return "hello";
   }
}

log4j.properties

# Root logger option
log4j.rootLogger = DEBUG, stdout, file

# Redirect log messages to console
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern = %d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

# Redirect log messages to a log file
log4j.appender.file = org.apache.log4j.RollingFileAppender
#outputs to Tomcat home
log4j.appender.file.File = ${catalina.home}/logs/myapp.log
log4j.appender.file.MaxFileSize = 5MB
log4j.appender.file.MaxBackupIndex = 10
log4j.appender.file.layout = org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern = %d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

TestWeb-servlet.xml

hello.jsp

Hello World
   
   
      
${message}

在这里，我们已经配置了LOG4J以在Tomcat控制台上和＆t;中的文件中记录详细信息。 tomcat主页→记录为myapp.log。

完成创建源文件和配置文件后，导出应用程序。右键单击您的应用程序，使用“导出”→“ WAR文件”选项，然后将您的TestWeb.war文件保存在Tomcat的webapps文件夹中。

现在，启动Tomcat服务器，并确保您能够使用标准浏览器从webapps文件夹访问其他网页。尝试URL- http：// localhost：8080 / TestWeb / hello ，我们将在Tomcat的日志中看到以下屏幕。

Spring LOG4J生成