java - SLF4J:slf4j-api 1.6.x(或更高版本)与此绑定(bind)不兼容

Question

2015-09-28 10:02:21,890 ERROR [STDERR] (HDScanner) SLF4J: slf4j-api 1.6.x (or later) is incompatible with this binding.
2015-09-28 10:02:21,891 ERROR [STDERR] (HDScanner) SLF4J: Your binding is version 1.5.5 or earlier.
2015-09-28 10:02:21,891 ERROR [STDERR] (HDScanner) SLF4J: Upgrade your binding to version 1.6.x.
2015-09-28 10:02:21,891 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/metasolv-web]] (HDScanner) Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
java.lang.NoSuchMethodError: org.slf4j.impl.StaticLoggerBinder.getSingleton()Lorg/slf4j/impl/StaticLoggerBinder;

如何修复此错误？另外，在我的应用程序中，我没有在任何地方使用 slf4j，只有 Dozer 库使用它。从下面的堆栈跟踪中，我看到 spring 应用程序正在使用 slf4j，但为什么它不自己加载一个？

java.lang.NoSuchMethodError: org.slf4j.impl.StaticLoggerBinder.getSingleton()Lorg/slf4j/impl/StaticLoggerBinder;
    at org.slf4j.LoggerFactory.bind(LoggerFactory.java:128)
    at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:107)
    at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:295)
    at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:269)
    at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:156)
    at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:132)
    at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:645)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:191)

Answer 1

我不得不从 dozer 库中排除 slf4j 依赖项，并将依赖项直接添加到 POM 文件中。

如@Powerlord 所述，我必须添加两个库，一个用于核心 slf4j，另一个是绑定(bind)库。

下面的 Maven 依赖项。

       <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.6.6</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <version>1.6.6</version>
        </dependency>

        <dependency>
            <groupId>net.sf.dozer</groupId>
            <artifactId>dozer</artifactId>
            <version>5.5.1</version>
            <exclusions>
                <exclusion>
                    <artifactId>jcl-over-slf4j</artifactId>
                    <groupId>org.slf4j</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>slf4j-api</artifactId>
                    <groupId>org.slf4j</groupId>
                </exclusion>
            </exclusions>
        </dependency>