java SpringWeb如何实现打印日志

今天后台调试，调用后台接口却发现没有把日志打印出来

于是开始配置打印日志

1.导入log4j的jar

import org.apache.log4j.Logger;

2.配置log4j.properties

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} %m%n
log4j.category.org.hibernate.tool.hbm2ddl=DEBUG
 
log4j.category.org.hibernate.SQL=DEBUG
 
log4j.rootLogger=info, stdout

 3.web.xml配置监听:

	<context-param>
        <param-name>log4jConfigLocation</param-name>
        <param-value>log4j.properties</param-value>
    </context-param>

完整的web.xml的配置:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://java.sun.com/xml/ns/javaee"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	version="2.5">
	<display-name>newsweb</display-name>
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>

	<servlet>
		<servlet-name>springMVC</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>springMVC</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>WEB-INF/applicationContext.xml</param-value>
	</context-param>
	<context-param>
        <param-name>log4jConfigLocation</param-name>
        <param-value>log4j.properties</param-value>
    </context-param>
	
	
	<servlet-mapping>
		<servlet-name>default</servlet-name>
		<url-pattern>*.html</url-pattern>
	</servlet-mapping>
	

</web-app>

4.在类中引入log打印日志:

5.打印日志:

 

希望对你有所帮助，如果你想做web项目可以私聊我哦