SpringBoot（八）：SpringBoot整合Log4j

秒速五厘米 2022-05-29 13:40 276阅读 0赞

> SpringBoot默认使用日志框架logback

### 一、依赖 ###

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <exclusions>
                
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    
        
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j</artifactId>
            <version>1.3.8.RELEASE</version>
        </dependency>

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### 二、Log4j配置文件 ###

# Log4j配置
    log4j.rootCategory=INFO,stdout
    
    # 控制台输出
    log4j.appender.stdout=org.apache.log4j.ConsoleAppender
    log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
    log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} %5p %c{
       1}:%L - %m%n

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### 三、使用Log4j ###

import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    /** * @author zh * @ClassName cn.aduu.web.HelloController * @Description */
    @RestController
    public class HelloController{ 
    
        private static final Logger logger = LoggerFactory.getLogger(HelloController.class);
    
        @RequestMapping("hello")
        public String hello() throws JsonProcessingException {
            logger.info("hello world");
            return "hello world";
        }
    }

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### 四、部分日志打印效果 ###

2017-10-28 20:38:35,522  INFO SimpleUrlHandlerMapping:362 - Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
    2017-10-28 20:38:35,564  INFO OptionalLiveReloadServer:58 - LiveReload server is running on port 35729
    2017-10-28 20:38:35,588  INFO AnnotationMBeanExporter:431 - Registering beans for JMX exposure on startup
    2017-10-28 20:38:35,589  INFO AnnotationMBeanExporter:916 - Bean with name 'druidDataSource' has been autodetected for JMX exposure
    2017-10-28 20:38:35,590  INFO AnnotationMBeanExporter:671 - Located MBean 'druidDataSource': registering with JMX server as MBean [com.alibaba.druid.pool:name=druidDataSource,type=DruidDataSource]
    2017-10-28 20:38:35,603  INFO TomcatEmbeddedServletContainer:201 - Tomcat started on port(s): 8088 (http)
    2017-10-28 20:38:35,605  INFO MainApplication:57 - Started MainApplication in 0.911 seconds (JVM running for 259.963)
    2017-10-28 20:38:36,607  INFO DispatcherServlet:489 - FrameworkServlet 'dispatcherServlet': initialization started
    2017-10-28 20:38:36,609  INFO DispatcherServlet:508 - FrameworkServlet 'dispatcherServlet': initialization completed in 2 ms
    2017-10-28 20:38:36,610  INFO HelloController:27 - hello world