• 使用maven引入slf4j、logback时发生冲突


    pom.xml文件中的slf4j、logback引入配置:

     1     <!-- 日志 -->
     2 
     3     <dependency>
     4       <groupId>org.slf4j</groupId>
     5       <artifactId>slf4j-log4j12</artifactId>
     6       <version>1.7.12</version>
     7     </dependency>
     8 
     9     <dependency>
    10         <groupId>ch.qos.logback</groupId>
    11         <artifactId>logback-core</artifactId>
    12         <version>1.1.1</version>
    13     </dependency>
    14 
    15     <dependency>
    16         <groupId>ch.qos.logback</groupId>
    17         <artifactId>logback-classic</artifactId>
    18         <version>1.1.1</version>
    19     </dependency>

    logback.xml中的配置:

     1 <configuration>
     2 
     3   <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
     4     <!-- encoders are assigned the type
     5          ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -->
     6     <encoder>
     7       <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
     8     </encoder>
     9   </appender>
    10 
    11   <root level="debug">
    12     <appender-ref ref="STDOUT" />
    13   </root>
    14 
    15 </configuration>

    运行代码时的输出:

    log4j:WARN No appenders could be found for logger (org.springframework.test.context.junit4.SpringJUnit4ClassRunner).
    log4j:WARN Please initialize the log4j system properly.
    log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
    SLF4J: Class path contains multiple SLF4J bindings.
    SLF4J: Found binding in [jar:file:/E:/JAVA/MavenLocalRepository/repository/org/slf4j/slf4j-log4j12/1.7.12/slf4j-log4j12-1.7.12.jar!/org/slf4j/impl/StaticLoggerBinder.class]
    SLF4J: Found binding in [jar:file:/E:/JAVA/MavenLocalRepository/repository/ch/qos/logback/logback-classic/1.1.1/logback-classic-1.1.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
    SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
    SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]

    显示的是这两个jar冲突了。

    解决方案:

    将pom.xml中的org.slf4j和logback-core去掉,仅留下logback-classic就可以了

    <!-- 日志 -->
        <!-- 
            <dependency>
              <groupId>org.slf4j</groupId>
              <artifactId>slf4j-log4j12</artifactId>
              <version>1.7.12</version>
            </dependency>
            <dependency>
                <groupId>ch.qos.logback</groupId>
                <artifactId>logback-core</artifactId>
                <version>1.1.1</version>
            </dependency>
         -->
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.1.1</version>
        </dependency>

    正常输出:

    省略........

    信息: Refreshing org.springframework.context.support.GenericApplicationContext@66d1af89: startup date [Sun Mar 04 13:18:26 CST 2018]; root of context hierarchy
    三月 04, 2018 1:18:26 下午 com.mchange.v2.log.MLog <clinit>
    信息: MLog clients using java 1.4+ standard logging.
    三月 04, 2018 1:18:27 下午 com.mchange.v2.c3p0.C3P0Registry banner
    信息: Initializing c3p0-0.9.1.2 [built 21-May-2007 15:04:56; debug? true; trace: 10]
    13:18:27.974 [main] DEBUG org.apache.ibatis.logging.LogFactory - Logging initialized using 'class org.apache.ibatis.logging.slf4j.Slf4jImpl' adapter.
    13:18:28.312 [main] DEBUG org.apache.ibatis.io.VFS - Class not found: org.jboss.vfs.VFS
    13:18:28.312 [main] DEBUG org.apache.ibatis.io.JBoss6VFS - JBoss 6 VFS API is not available in this environment.
    13:18:28.315 [main] DEBUG org.apache.ibatis.io.VFS - Class not found: org.jboss.vfs.VirtualFile
    13:18:28.317 [main] DEBUG org.apache.ibatis.io.VFS - VFS implementation org.apache.ibatis.io.JBoss6VFS is not valid in this environment.

    省略......

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  • 原文地址:https://www.cnblogs.com/Drajun/p/8504465.html
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