maven 编译错误log4j

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问题描述

我正在构建Java应用程序，突然发现了汇编问题:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile (default-compile) on project sonda: Compilation failure: Compilation failure:
[ERROR] ..../service/UserService.java:[7,23] package org.apache.log4j does not exist

，但我之前构建了此应用程序，一切都还好.此外，当我使用tomcat在日食下运行此应用程序时，它运行良好.

在pom中我有:

<dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>${org.slf4j-version}</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>jcl-over-slf4j</artifactId>
        <version>${org.slf4j-version}</version>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>${org.slf4j-version}</version>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.15</version>
        <exclusions>
            <exclusion>
                <groupId>javax.mail</groupId>
                <artifactId>mail</artifactId>
            </exclusion>
            <exclusion>
                <groupId>javax.jms</groupId>
                <artifactId>jms</artifactId>
            </exclusion>
            <exclusion>
                <groupId>com.sun.jdmk</groupId>
                <artifactId>jmxtools</artifactId>
            </exclusion>
            <exclusion>
                <groupId>com.sun.jmx</groupId>
                <artifactId>jmxri</artifactId>
            </exclusion>
        </exclusions>
        <scope>runtime</scope>
    </dependency>

你能帮我吗?

其他推荐答案

我遇到了完全相同的问题:

pom.xml:

<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <version>2.3</version>
</dependency>

构建错误:package org.apache.log4j does not exist

根本原因:我需要针对较旧的JRE(JRE 1.5.x)构建项目；当前的库显然不兼容.

解决方案:back-rev to log4j.jar的旧版本:

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

<=成功地编译！

其他推荐答案

我在从log4j 1.x到log4j 2.x迁移时遇到了此错误，并意识到我仍然有一些仅适用于1.x的代码.我不是重构代码，而是将此依赖性添加到我的pom.xml中以保持兼容性.

<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-1.2-api</artifactId>
    <version>2.17.1</version>
</dependency>

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问题描述

i'm building java application and suddenly i found problem with compilation:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile (default-compile) on project sonda: Compilation failure: Compilation failure:
[ERROR] ..../service/UserService.java:[7,23] package org.apache.log4j does not exist

But i was building this application before and everything was ok. Additionally, when i run this application under Eclipse using tomcat, it's running well.

In pom i have:

<dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>${org.slf4j-version}</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>jcl-over-slf4j</artifactId>
        <version>${org.slf4j-version}</version>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>${org.slf4j-version}</version>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.15</version>
        <exclusions>
            <exclusion>
                <groupId>javax.mail</groupId>
                <artifactId>mail</artifactId>
            </exclusion>
            <exclusion>
                <groupId>javax.jms</groupId>
                <artifactId>jms</artifactId>
            </exclusion>
            <exclusion>
                <groupId>com.sun.jdmk</groupId>
                <artifactId>jmxtools</artifactId>
            </exclusion>
            <exclusion>
                <groupId>com.sun.jmx</groupId>
                <artifactId>jmxri</artifactId>
            </exclusion>
        </exclusions>
        <scope>runtime</scope>
    </dependency>

Can you help me ?

其他推荐答案

I ran into exactly the same problem:

pom.xml:

<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <version>2.3</version>
</dependency>

Build error: package org.apache.log4j does not exist

Root cause: I needed to build my project against an older JRE (JRE 1.5.x); the current libraries are apparently incompatible.

Solution: back-rev to an older version of log4j.jar:

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

<= Compiles successfully!

其他推荐答案

I encountered this error while migrating from log4j 1.x to log4j 2.x and realized I still had some code that only worked with 1.x. Instead of refactoring code I added this dependency to my pom.xml in order to maintain compatibility.

<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-1.2-api</artifactId>
    <version>2.17.1</version>
</dependency>

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