SpringBoot日志框架

1. 移除默认日志

   <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter</artifactId>
         <exclusions>
         <!--去除日志依赖-->
           <exclusion>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-starter-logging</artifactId>
             </exclusion>
           </exclusions>
   </dependency>
   

2. 添加日志框架依赖

   <!--引入日志框架 抽象层与实现层-->
   <dependency>
         <groupId>org.slf4j</groupId>
         <artifactId>slf4j-api</artifactId>
         <version>1.7.21</version>
   </dependency>
   <dependency>
         <groupId>org.slf4j</groupId>
         <artifactId>slf4j-log4j12</artifactId>
         <version>1.7.21</version>
   </dependency>
   

3. 创建log4j.properties并且放置在资源文件目录src/main/resources/log4j.properties

   log4j.rootLogger=DEBUG,stdout
   #log4j.rootLogger=DEBUG,stdout,file
   log4j.additivity.org.apache=true
   
   log4j.appender.stdout=org.apache.log4j.ConsoleAppender
   log4j.appender.stdout.threshold=INFO
   log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
   log4j.appender.stdout.layout.ConversionPattern=%-5p %c{1}:%L - %m%n
   
   # 将日志写入到指定文件中
   #log4j.appender.file=org.apache.log4j.DailyRollingFileAppender
   #log4j.appender.file.layout=org.apache.log4j.PatternLayout
   #log4j.appender.file.DatePattern='.'yyyy-MM-dd-HH-mm
   #log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
   #log4j.appender.file.Threshold=INFO
   #log4j.appender.file.append=true
   #log4j.appender.file.File=/workspaces/logs/foodie-api/imooc.log
   

4. 在application.yml中添加打印MyBatis logger的配置

   mybatis:
     type-aliases-package: com.imooc.pojo
     mapper-locations: classpath:mapper/*.xml
     configuration:
       log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
   

5. 在Controller中打印日志

   public static final Logger log = LoggerFactory.getLogger(xxxx.class);
   
    log.error("====== 执行结束，耗时:{} 毫秒 ======",takeTime);
    log.warn("====== 执行结束，耗时:{} 毫秒 ======",takeTime);
    log.info("====== 执行结束，耗时:{} 毫秒 ======",takeTime);