运行 mvn package 时如何阻止 logback-classic 重新出现在 m2 存储库中

Question

我在加载应用程序上下文时运行遇到以下错误

SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/C:.../repository/org/slf4j/slf4j-nop/1.7.30/slf4j-nop-1.7.30.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/C:.../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#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.helpers.NOPLoggerFactory]

并且因为我想保留 Lombok 附带的 slf4j，所以我尝试删除文件夹 logback-classic/1.2.3。但是每当我运行 mvn package 时，它就会一直回来，所以我的 pom 中肯定有一些东西正在重新安装它，但它从未被具体引用，所以必须发生一些继承的喧嚣。

pom.xml

<project>
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.0.RELEASE</version>
        <relativePath/>
    </parent>
    <groupId>**********</groupId>
    <artifactId>rest</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>rest</name>

    <properties>
        <java.version>1.8</java.version>
        <endpoints.project.id>**********</endpoints.project.id>
    </properties>

    <dependencies>
        <dependency>
            <groupId>com.google.endpoints</groupId>
            <artifactId>endpoints-framework</artifactId>
            <version>2.2.1</version>
        </dependency>
        <!-- [START api_management] -->
        <dependency>
            <groupId>com.google.endpoints</groupId>
            <artifactId>endpoints-management-control-appengine-all</artifactId>
            <version>1.0.12</version>
        </dependency>
        <!-- [END api_management] -->
        <dependency>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-api-1.0-sdk</artifactId>
            <version>1.9.80</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <type>jar</type>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.inject</groupId>
            <artifactId>javax.inject</artifactId>
            <version>1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>com.google.cloud.tools</groupId>
                <artifactId>appengine-maven-plugin</artifactId>
                <version>2.2.0</version>
                <configuration>
                    <!-- deploy configuration -->
                    <projectId>GCLOUD_CONFIG</projectId>
                    <version>GCLOUD_CONFIG</version>
                </configuration>
            </plugin>
            <!-- [START endpoints_plugin] -->
            <plugin>
                <groupId>com.google.cloud.tools</groupId>
                <artifactId>endpoints-framework-maven-plugin</artifactId>
                <version>2.0.1</version>
                <configuration>
                    <!-- plugin configuration -->
                    <hostname>${endpoints.project.id}.appspot.com</hostname>
                </configuration>
            </plugin>
            <!-- [END endpoints_plugin] -->
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>versions-maven-plugin</artifactId>
                <version>2.7</version>
                <executions>
                    <execution>
                        <phase>compile</phase>
                        <goals>
                            <goal>display-dependency-updates</goal>
                            <goal>display-plugin-updates</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

如果有人可以帮助找到有问题的依赖项或帮助我弄清楚如何找到它并消除 slf4j 错误，那就太好了。

Answer 1

我在这里回答是因为评论太短了：（还不是最终答案）：

它回来了，因为它是 spring-boot-starter 的传递依赖......或者更准确地说，spring-boot-starter 依赖于 spring-boot-starter-logging，而 spring-boot-starter-logging 依赖于 logback-classic 这是 default for spring-boot。

此外我没看到slf4j in lombok project

还有一件事是第一个依赖关系 endpoints-framework contains the reference to slf4j-nop 从我的角度来看这是错误的。

除了以上所有配置的 versions-maven-plugin 并将其绑定到 compile 阶段没有任何意义，这会使您的构建非常缓慢....

运行 mvn package 时如何阻止 logback-classic 重新出现在 m2 存储库中

How to stop logback-classic from reappearing in m2 repository when running mvn package

spring

maven

package

pom.xml

slf4j