java - SLF4J:加载类 "org.slf4j.impl.StaticLoggerBinder"失败。在一个 Maven 项目中

Question

我依赖于 SLF4J。我收到此错误:

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

这是我的 Maven 条目:

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

    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>1.6.6</version>
    </dependency>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.16</version>
    </dependency>

问题出在哪里？

---

编辑:没有 log4j 依赖我得到以下异常

Failed to instantiate SLF4J LoggerFactory
Reported exception:
java.lang.NoClassDefFoundError: org.slf4j.impl.StaticLoggerBinder
    at org.slf4j.LoggerFactory.bind(LoggerFactory.java:121)
    at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:111)
    at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:268)
    at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:241)
    at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:254)
    at org.apache.bval.jsr303.ConfigurationImpl.<clinit>(ConfigurationImpl.java:50)
    at java.lang.J9VMInternals.initializeImpl(Native Method)
    at java.lang.J9VMInternals.initialize(J9VMInternals.java:228)
    at org.apache.bval.jsr303.ApacheValidationProvider.createGenericConfiguration(ApacheValidationProvider.java:66)
    at javax.validation.Validation$GenericBootstrapImpl.configure(Validation.java:173)
    at javax.validation.Validation.buildDefaultValidatorFactory(Validation.java:50)
    at com.daimler.zv9.basic.entity.AbstractEntity.<clinit>(AbstractEntity.java:73)
    at java.lang.J9VMInternals.initializeImpl(Native Method)
    at java.lang.J9VMInternals.initialize(J9VMInternals.java:228)
    at java.lang.J9VMInternals.initialize(J9VMInternals.java:195)
    at java.lang.Class.forNameImpl(Native Method)
    at java.lang.Class.forName(Class.java:168)

---

EDIT2:这是我得到的一个示例 MAVEN 树

[INFO] com.myCompany.abc:ABC_Document:ejb:0.0.1-SNAPSHOT
[INFO] +- com.myCompany.abc:ABC_Basic:jar:0.0.1-SNAPSHOT:compile
[INFO] +- com.myCompany.iap:javax.j2ee:jar:5.0.0:provided
[INFO] +- com.myCompany.iap:logging:jar:5.0.0:provided
[INFO] +- com.myCompany.iap:util:jar:5.0.0:provided
[INFO] +- junit:junit:jar:4.8.2:test
[INFO] +- javax.servlet:jstl:jar:1.2:provided
[INFO] +- org.slf4j:slf4j-api:jar:1.6.6:compile
[INFO] +- org.slf4j:slf4j-simple:jar:1.6.6:compile
[INFO] \- org.mockito:mockito-all:jar:1.9.0:test

Answer 1

我假设您使用 Eclipse 作为您的开发环境。

Eclipse Juno、Indigo 和 Kepler 在使用捆绑的 maven 版本 (m2e) 时，不会抑制消息 SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder"。此行为从 m2e 版本 1.1.0.20120530-0009 及更高版本开始存在。

虽然，这表示为错误，您的日志将正常保存。在修复此错误之前，突出显示的错误仍将存在。更多信息请查看 m2e support site .

当前可用的解决方案是使用外部 maven 版本而不是 Eclipse 的捆绑版本。您可以在下面的问题中找到有关此解决方案以及有关此错误的更多详细信息，我相信该问题描述了您面临的相同问题。

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". error