maven下的slf4j和logback简易整合

落日映苍穹つ 2022-06-08 01:47 853阅读 0赞

1、创建一个maven工程  
2、添加所需的jar包  
![这里写图片描述][SouthEast]

我是在maven工程下pom.xml》dependencies》add 搜索添加的

**这里版本不能搞错，slf4j1.8和logback-classic不搭的**

如下面的错误信息，就是slf4j的版本问题了

SLF4J: No SLF4J providers were found.
    SLF4J: Defaulting to no-operation (NOP) logger implementation
    SLF4J: See http://www.slf4j.org/codes.html#noProviders for further details.
    SLF4J: Class path contains SLF4J bindings targeting slf4j-api versions prior to 1.8.
    SLF4J: Ignoring binding found at [jar:file:/C:/Users/Administrator/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
    SLF4J: See http://www.slf4j.org/codes.html#ignoredBindings for an explanation.

3、配置logback.xml （置于classpath下）

<?xml version="1.0" encoding="UTF-8"?>
    <configuration>  
    
      
      <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">  
        <encoder>  
        
          <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>  
        </encoder>  
      </appender>  
      
      
      <root level="debug">  
        <appender-ref ref="STDOUT" />  
      </root>  
    </configuration>

**4、slf4j很方便**

只需要简简单单就能输出日志

private static Logger logger = LoggerFactory.getLogger(App.class);
    
    	public static void main(String[] args) {
    		logger.info("-------------------info");
    		logger.debug("--------------------debug");
    		System.out.println("Hello World!");
    	}

结果如下  
![这里写图片描述][SouthEast 1]

[SouthEast]: /images/20220608/332ee30fb25d4b1e9bcb54177c077281.png
[SouthEast 1]: /images/20220608/661731a14b6b43dd90209a9e19ab4da6.png