slf4j(Simple Logging Facade 4 Java)

最新推荐文章于 2024-12-29 09:00:00 发布

原创最新推荐文章于 2024-12-29 09:00:00 发布 · 655 阅读

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#slf4j #logging #java #warnings #log4j

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本文介绍了SLF4J框架的不同组成部分，包括API接口、NOP实现、Simple实现、Log4j1.2实现等。详细解释了每个部分的功能及应用场景。

slf4j-api is the java interfaces of slf4j framework.it has no implemented classes,so it's no indenpendent.

       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-api</artifactId>
       <version>1.6.1</version>
       <type>jar</type>
       <scope>compile</scope>

</dependency>

slf4j-nop is the real implementation of slf4j framework.But it doesn't log anything.

       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-nop</artifactId>
       <version>1.6.1</version>
       <type>jar</type>
       <scope>compile</scope>

</dependency>

slf4j-simple is the real implementation of slf4j framework.But it only sends info messages to System.out,sends warnings and errors to System.err,and ignores all other logging levels (like debug and trace).

   <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-simple</artifactId>
       <version>1.6.1</version>
       <type>jar</type>
       <scope>compile</scope>

</dependency>

slf4j-log4j12 is the real implementation of slf4j framework.And it also need the log4j framework,so you have to configure the logging system.

   <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-log4j12</artifactId>
       <version>1.6.1</version>
       <type>jar</type>
       <scope>compile</scope>
   </dependency>