一、概述：

• 步骤：第一步加入相关pom文件；
• 步骤二：添加logback.xml配置；
• 步骤三：web.xml添加日志监听

二、pom.xml加入jar包

 1 <!-- Logback -->
 2         <!-- https://mvnrepository.com/artifact/ch.qos.logback/logback-classic -->
 3         <dependency>
 4             <groupId>ch.qos.logback</groupId>
 5             <artifactId>logback-classic</artifactId>
 6             <version>1.2.3</version>
 7         </dependency>
 8         <!-- https://mvnrepository.com/artifact/ch.qos.logback/logback-core -->
 9         <dependency>
10             <groupId>ch.qos.logback</groupId>
11             <artifactId>logback-core</artifactId>
12             <version>1.2.3</version>
13         </dependency>
14         <!-- https://mvnrepository.com/artifact/org.logback-extensions/logback-ext-spring -->
15         <dependency>
16             <groupId>org.logback-extensions</groupId>
17             <artifactId>logback-ext-spring</artifactId>
18             <version>0.1.4</version>
19         </dependency>
20         <!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
21         <dependency>
22             <groupId>org.slf4j</groupId>
23             <artifactId>slf4j-api</artifactId>
24             <version>1.7.25</version>
25         </dependency>
26         <!-- https://mvnrepository.com/artifact/org.slf4j/jcl-over-slf4j -->
27         <dependency>
28             <groupId>org.slf4j</groupId>
29             <artifactId>jcl-over-slf4j</artifactId>
30             <version>1.7.25</version>
31         </dependency>

三、web 资源文件中配置logback.xml 

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <configuration>
 3     <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
 4         <Encoding>UTF-8</Encoding>
 5         <layout class="ch.qos.logback.classic.PatternLayout">
 6             <!--格式化输出：%d表示日期，%thread表示线程名，
 7             %-5level：级别从左显示5个字符宽度%msg：日志消息，%n是换行符 -->
 8             <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n</pattern>
 9         </layout>
10     </appender>
11 
12     <root level="INFO">
13         <appender-ref ref="STDOUT" />
14     </root>
15 </configuration>

四、web.xml中添加日志监听

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <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_4_0.xsd" version="4.0">
 3   <filter>
 4     <filter-name>CharacterEncodingFilter</filter-name>
 5     <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
 6     <init-param>
 7       <param-name>encoding</param-name>
 8       <param-value>utf-8</param-value>
 9     </init-param>
10   </filter>
11   <filter-mapping>
12     <filter-name>CharacterEncodingFilter</filter-name>
13     <url-pattern>/*</url-pattern>
14   </filter-mapping>
15   <context-param>
16     <param-name>contextConfigLocation</param-name>
17     <param-value>classpath:spring.xml</param-value>
18   </context-param>
19   <listener>
20     <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
21   </listener>
22   <servlet>
23     <servlet-name>springDispatcherServlet</servlet-name>
24     <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
25     <init-param>
26       <param-name>contextConfigLocation</param-name>
27       <param-value>classpath:springmvc.xml</param-value>
28     </init-param>
29     <load-on-startup>1</load-on-startup>
30   </servlet>
31   <servlet-mapping>
32     <servlet-name>springDispatcherServlet</servlet-name>
33     <url-pattern>/</url-pattern>
34   </servlet-mapping>
35   <filter>
36     <filter-name>HiddenHttpMethodFilter</filter-name>
37     <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
38   </filter>
39   <filter-mapping>
40     <filter-name>HiddenHttpMethodFilter</filter-name>
41     <url-pattern>/*</url-pattern>
42   </filter-mapping>
43       <!-- 添加日志监听器 -->  
44     <context-param>  
45         <param-name>logbackConfigLocation</param-name>  
46         <param-value>classpath:logback.xml</param-value>  
47     </context-param>  
48     <listener>  
49         <listener-class>ch.qos.logback.ext.spring.web.LogbackConfigListener</listener-class>  
50     </listener> 
51 </web-app>

参考地址：https://www.cnblogs.com/EasonJim/p/7810852.html