slf4j-log4j12

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本文链接： https://blog.csdn.net/lianghecai52171314/article/details/102777294

单独的 slf4j-log4j12

• 第一步：加入Maven依赖

  <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>1.7.28</version>
  </dependency>
  

• 第二步：在类路径下写log4j.properties

  ### 设置###
  log4j.rootLogger = debug,stdout,D,E
  
  ### 输出信息到控制抬 ###
  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 = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n
  
  ### 输出DEBUG 级别以上的日志到=E://logs/error.log ###
  log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
  log4j.appender.D.File = E://logs/log.log
  log4j.appender.D.Append = true
  log4j.appender.D.Threshold = DEBUG 
  log4j.appender.D.layout = org.apache.log4j.PatternLayout
  log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n
  
  ### 输出ERROR 级别以上的日志到=E://logs/error.log ###
  log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
  log4j.appender.E.File =E://logs/error.log 
  log4j.appender.E.Append = true
  log4j.appender.E.Threshold = ERROR 
  log4j.appender.E.layout = org.apache.log4j.PatternLayout
  log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n
  

• 第三步：测试代码

  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class DemoTest {
      private static final Logger logger = LoggerFactory.getLogger(DemoTest.class);
  
      public static void main(String[] args) {
          logger.info("带参日志测试:{}", "参数111");
          String key ="k1";
          try {
              System.out.println(3/0);
          } catch (Exception e) {
              log.error("strSet(): {} error: {}",key ,e.getMessage());
          }
  	}
  }
  

slf4j-log4j12结合Lombok做日志

• 第一步：导入Maven依赖

   <dependency>
          <groupId>org.slf4j</groupId>
          <artifactId>slf4j-log4j12</artifactId>
          <version>1.7.28</version>
      </dependency>
      
      <dependency>
          <groupId>org.projectlombok</groupId>
          <artifactId>lombok</artifactId>
          <version>1.18.10</version>
      </dependency>
  

• 第二步：在类路径下写log4j.properties

  ### 设置###
  log4j.rootLogger = debug,stdout,D,E
  
  ### 输出信息到控制抬 ###
  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 = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n
  
  ### 输出DEBUG 级别以上的日志到=E://logs/error.log ###
  log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
  log4j.appender.D.File = E://logs/log.log
  log4j.appender.D.Append = true
  log4j.appender.D.Threshold = DEBUG 
  log4j.appender.D.layout = org.apache.log4j.PatternLayout
  log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n
  
  ### 输出ERROR 级别以上的日志到=E://logs/error.log ###
  log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
  log4j.appender.E.File =E://logs/error.log 
  log4j.appender.E.Append = true
  log4j.appender.E.Threshold = ERROR 
  log4j.appender.E.layout = org.apache.log4j.PatternLayout
  log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n
  

• 第三步：测试代码 (下面代码在Intellij中没有测试通过)

  @Slf4j
  public class DemoTest {
  
      public static void main(String[] args) {
          String testInfo = "Free flying flowers are like dreams";
          log.info("The test info is :{}", testInfo);
      }
  
  }