java - org.apache.log4j.Logger 无法解析尽管 Maven 依赖项

Question

我正在使用 maven(即 eclipse 的 maven 插件)进行依赖管理，通常它可以工作。例如。 jasypt 得到了 strong text 解决，我可以毫无问题地使用它。但是，当尝试使用 Log4J 时，即使我按照 http://logging.apache.org/log4j/2.x/maven-artifacts.html 上描述的确切步骤进行操作，我也会遇到诸如“导入 org.apache.log4j 无法解决”之类的问题。 .

它说我需要将以下片段包含到我的 pom.xml 中

<dependencies>
  <dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-api</artifactId>
    <version>2.6.2</version>
  </dependency>
  <dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <version>2.6.2</version>
  </dependency>
</dependencies>

然而，正如下面在我的完整 pom.xml 中所给出的那样，它确实包含在我的 pom.xml 中。这对任何人都有意义吗？我还尝试用以下内容替换这两个依赖项，但没有成功

<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>2.6.2</version>
    <type>pom</type>
</dependency>

干杯汤姆

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>PCenter</groupId>
  <artifactId>PCenter</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <name>PCenter</name>
  <build>
    <sourceDirectory>src</sourceDirectory>
    <resources>
      <resource>
        <directory>src</directory>
        <excludes>
          <exclude>**/*.java</exclude>
        </excludes>
      </resource>
      <resource>
        <directory>ejbModule</directory>
        <excludes>
          <exclude>**/*.java</exclude>
        </excludes>
      </resource>
    </resources>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.5.1</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.6</version>
        <configuration>
          <warSourceDirectory>WebContent</warSourceDirectory>
          <failOnMissingWebXml>false</failOnMissingWebXml>
        </configuration>
      </plugin>
    </plugins>
  </build>
  <dependencies>
    <dependency>
        <groupId>com.paypal.sdk</groupId>
        <artifactId>rest-api-sdk</artifactId>
        <version>1.9.2</version>
    </dependency>
    <dependency>
        <groupId>org.jasypt</groupId>
        <artifactId>jasypt</artifactId>
        <version>1.9.2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.axis</groupId>
        <artifactId>axis</artifactId>
        <version>1.4</version>
    </dependency>
    <dependency>
        <groupId>org.apache.axis</groupId>
        <artifactId>axis-jaxrpc</artifactId>
        <version>1.4</version>
    </dependency>
    <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-api</artifactId>
        <version>2.6.2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-core</artifactId>
        <version>2.6.2</version>
    </dependency>
  </dependencies>
</project>

Answer 1

问题是您在依赖项中有 Log4j2，并使用较旧的 Log4j 1.2.x API。

• 要么依赖Log4j 1.2.x

  <dependencies>
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.17</version>
    </dependency>
  </dependencies>
  

• 或者为 Log4j 2.x 使用正确的 API 调用:

Calls to org.apache.log4j.Logger.getLogger() must be modified to org.apache.logging.log4j.LogManager.getLogger()

(来自Migrating from Log4j 1.x)