IDEA??????????????????Log4j2+Slf4j??????????????????

Posted 2020-10-13

?????????debug   erro   ??????   context   inter   war   col   nlog   inf   

?????????????????????????????????????????????????????????????????????????????????slf4j?????????????????????????????????log4j2???logback????????????????????????????????????????????????????????????????????????????????????slf4j?????????????????????????????????????????????????????????????????????????????????????????????log4j2????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

???????????????

• log4j2 2.8.1 + slf4j 1.7.25
• IntelliJ IDEA 2017.2.5
• maven 3.0.5

????????????

Step 1?????????maven??????

 

????????????<properties>
      ??????<slf4j.version>1.7.25</slf4j.version>
      ??????<log4j.version>2.8.2</log4j.version>
????????????</properties>
???????????????<dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-slf4j-impl</artifactId>
            <version>${log4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-web</artifactId>
            <version>${log4j.version}</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-api</artifactId>
            <version>${log4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>${log4j.version}</version>
        </dependency>

 

Step 2?????????????????????

???????????????????????????resources?????????????????????????????????log4j2.xml??????????????????IDEA????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????web.xml??????????????????????????????

    <context-param>
        <param-name>log4jConfiguration</param-name>
        <!-- ???????????????????????????????????????????????????????????? -->
        <param-value>classpath:conf/log4j2.xml</param-value>
    </context-param>    

 

??????????????????log4j2.xml????????????????????????????????????????????????????????????????????????

<?xml version="1.0" encoding="utf-8"?>
<!--???????????????TRACE < DEBUG < INFO < WARN < ERROR < FATAL,???????????????WARN????????????WARN????????????????????????-->
<!--
    status : ??????????????????log4j2???????????????????????????,???????????????,????????????trace???,?????????log4j2????????????????????????
    monitorInterval : Log4j?????????????????????????????????????????????????????????, ???????????????????????????????????????300???????????????????????????
-->
<Configuration status="ERROR" monitorInterval="300">
    <!--<properties>-->
    <!--<property name="LOG_HOME">F:\logs</property>-->
    <!--<property name="ERROR_LOG_FILE_NAME">error</property>-->
    <!--</properties>-->
    <Appenders>
        <Console name="Console" target="SYSTEM_OUT"> <!-- ???????????????Console???Appender -->
            <PatternLayout pattern="%d{HH:mm:ss} [%-5level] [%-10thread] %c{1} - %msg%n"/> <!-- ???????????????Pattern???Layout -->
        </Console>
    </Appenders>
    <!--??????logger??????????????????logger??????????????????appender???appender????????????-->
    <Loggers>
        <Root level="error"> <!-- ??????Root Logger -->
            <AppenderRef ref="Console"/> <!-- Root Logger???Appender?????????????????????Console -->
        </Root>
        <!--???????????????MainLogger???Logger?????????????????????info???info???????????????????????????????????? -->
        <Logger name="MainLogger" level="info" additivity="false">
            <AppenderRef ref="Console"/> <!-- Root Logger???Appender?????????????????????Console -->
        </Logger>
    </Loggers>
</Configuration>

 

Step 3??? ???Java???????????????slf4j?????????????????????

 ????????????Logger???????????????????????????????????????

@Controller
public class MainController {
    // ??????log4j2.xml???????????????????????????MainLogger??????Logger
    // ???????????????????????????Logger??????????????????Logger???????????????????????????
    private static final Logger log = LoggerFactory.getLogger("MainLogger");

    @RequestMapping(value = "/test")
    public String test(){
        log.info("info...");
        log.debug("debug...");
        log.warn("warn...");
        log.error("error...");
        return "test";
    }
}