使用log4j2实现的slf4j异常 [英] Exception with Slf4j with log4j2 implementation

问题描述

在顶层的log4j2实现上设置slf4j时，我得到了以下内容。尽管我将log4J2配置为我的slf4j接口实现，但我仍然没有看到找到任何SLF4J提供程序。不确定我错过了什么

日志中的错误

01-10-2022 19:22:46,115 ERROR [stderr] (MSC service thread 1-5) SLF4J: No SLF4J providers were found.
01-10-2022 19:22:46,115 ERROR [stderr] (MSC service thread 1-5) SLF4J: Defaulting to no-operation (NOP) logger implementation
01-10-2022 19:22:46,115 ERROR [stderr] (MSC service thread 1-5) SLF4J: See http://www.slf4j.org/codes.html#noProviders for further details.
01-10-2022 19:22:46,115 ERROR [stderr] (MSC service thread 1-5) SLF4J: Class path contains SLF4J bindings targeting slf4j-api versions prior to 1.8.
01-10-2022 19:22:46,116 ERROR [stderr] (MSC service thread 1-5) SLF4J: Ignoring binding found at [vfs:/content/abc.war/WEB-INF/lib/log4j-slf4j-impl-2.17.0.jar/org/slf4j/impl/StaticLoggerBinder.class]
01-10-2022 19:22:46,116 ERROR [stderr] (MSC service thread 1-5) SLF4J: See http://www.slf4j.org/codes.html#ignoredBindings for an explanation.

属性文件

log4j.appender.file=org.apache.log4j.DailyRollingFileAppender
log4j.appender.file.File=/sasa.log
log4j.appender.file.Append=true
log4j.appender.file.MaxFileSize=100MB
log4j.appender.file.MaxBackupIndex=5
log4j.appender.file.DatePattern='.'yyyy-MM-dd'.log'
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d %-5p [%t] %-17c{2} (%13F:%L) %3x - %m%n

Java文件

导入org.slf4j.Logger； 导入org.slf4j.LoggerFactory；

@Component
public class ABC{
    
    private static final Logger log = LoggerFactory.getLogger(abc.class);
    
    public String getCall(String url) throws Exception {
        try {
            log.info("getCall url - " + url );
            response = new String(get.getResponseBody(), UTFSTR);
            log.info(": Response code:"+response);
        } catch (Exception e) {
            log.error(" getCall - EXCEPTION - " + e.getLocalizedMessage());
            throw e;
        } 
        return response;
    } 
}

已配置POM文件。

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.5.2</version>
    <properties>
        <java.version>1.8</java.version>
        <slf4j.version>2.0.0-alpha5</slf4j.version>
        <log4j2.version>2.17.0</log4j2.version>
    </properties>
    
    <dependencies>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-api</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-slf4j-impl</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-batch</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-tomcat</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>logback-classic</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>logback-classic</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies> 

推荐答案

编辑：由于SLF4J1.8和SLF4J2.0之间存在非向后兼容的更改(请参阅this question)，目前SLF4J2.0和Log4j2.x Core之间没有绑定。您需要将SLF4J降级为1.8.0-beta4并使用下面的解决方案。

Log4j 2.x有two different SLF4J bindings。因为您想使用SLF4J 1.8+，所以您导入了错误的版本。使用：

<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-slf4j18-impl</artifactId>
</dependency>

而不是：

<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-slf4j-impl</artifactId>
</dependency>

备注：您问题中的Log4j配置是针对Log4j 1.2的。它不能与Log4j 2.x和Spring Boot一起使用。

这篇关于使用log4j2实现的slf4j异常的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！