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mvn 安装错误：包不存在

[英]mvn install error: package does not exist

 原文  2020-01-15 00:25:28  2   2    java/ spring-boot/ maven

问题描述

我有这个场景：

  1. 我有一个带有 spring boot 的 maven 项目，我在这个包结构中只有一些典型的 pojo 类，例如：com.demo.core

pom结构

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </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>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

com/demo/core/Person.java

  1. 然后我尝试使用该基础项目作为其他负责数据库持久性的 Spring Boot 项目的依赖项。

    • 在这里，我使用 spring 数据、lombok 和其他数据。

第二个项目 pom 依赖项：

<properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.derby</groupId>
            <artifactId>derby</artifactId>
            <scope>runtime</scope>
        </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>
        </dependency>

        <!--  local dependencies -->
**
        <dependency>
            <groupId>com.demo</groupId>
            <artifactId>core-baseproject</artifactId>
            <version>0.0.1-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency> 
**
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

  1. 我在基础项目中运行 mvn clean install 并验证 jar 文件是否在我的本地 .m2 存储库结构中。

  2. 当我尝试在第二个项目中运行mvn clean install ，我收到一条错误消息，说 com.demo.core 包没有退出，因此没有在该包中找到类。

错误详情：

[INFO] Scanning for projects...
[INFO] 
[INFO] --------------< com.demo:jpa-dataprovider-simple >---------------
[INFO] Building jpa-dataprovider-simple 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- maven-resources-plugin:3.1.0:resources (default-resources) @ jpa-dataprovider-simple ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] Copying 0 resource
[INFO] 
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ jpa-dataprovider-simple ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 7 source files to /home/demo/sts-eclipse-wrkspace-simple/jpa-dataprovider-simple/target/classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] /home/demo/sts-eclipse-wrkspace-simple-pos/jpa-dataprovider-simple-pos/src/main/java/com/demo/jpa/dataprovider/mapper/TerminalConfigJpaMapper.java:[4,35] package com.demo.core.entity does not exist
[ERROR] /home/demo/sts-eclipse-wrkspace-simple-pos/jpa-dataprovider-simple/src/main/java/com/demo/jpa/dataprovider/mapper/TerminalConfigJpaMapper.java:[8,59] cannot find symbol
  symbol:   class TerminalConfig
  location: class com.demo.jpa.dataprovider.mapper.TerminalConfigJpaMapper
[ERROR] /home/demo/sts-eclipse-wrkspace-simple-pos/jpa-dataprovider-simple/src/main/java/com/demo/jpa/dataprovider/mapper/TerminalConfigJpaMapper.java:[18,23] cannot find symbol
  symbol:   class TerminalConfig
  location: class com.demo.jpa.dataprovider.mapper.TerminalConfigJpaMapper
[ERROR] /home/demo/sts-eclipse-wrkspace-simple-pos/jpa-dataprovider-simple/src/main/java/com/demo/jpa/dataprovider/gateway/JpaTerminalConfigGatewayImpl.java:[9,35] package com.demo.core.entity does not exist
[ERROR] /home/demo/sts-eclipse-wrkspace-simple-pos/jpa-dataprovider-simple/src/main/java/com/demo/jpa/dataprovider/gateway/JpaTerminalConfigGatewayImpl.java:[10,36] package com.demo.core.gateway does not exist
[ERROR] /home/demo/sts-eclipse-wrkspace-simple-pos/jpa-dataprovider-simple/src/main/java/com/demo/jpa/dataprovider/gateway/JpaTerminalConfigGatewayImpl.java:[14,54] cannot find symbol
  symbol: class TerminalConfigGateway
[ERROR] /home/demo/sts-eclipse-wrkspace-simple/jpa-dataprovider-simple/src/main/java/com/demo/jpa/dataprovider/gateway/JpaTerminalConfigGatewayImpl.java:[24,36] cannot find symbol
  symbol:   class TerminalConfig
  location: class com.demo.jpa.dataprovider.gateway.JpaTerminalConfigGatewayImpl
[ERROR] /home/demo/sts-eclipse-wrkspace-simple-pos/jpa-dataprovider-simple/src/main/java/com/demo/jpa/dataprovider/gateway/JpaTerminalConfigGatewayImpl.java:[24,16] cannot find symbol
  symbol:   class TerminalConfig
  location: class com.demo.jpa.dataprovider.gateway.JpaTerminalConfigGatewayImpl
[INFO] 8 errors 
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  5.714 s
[INFO] Finished at: 2020-01-14T18:08:20-05:00
[INFO] ------------------------------------------------------------------------
[WARNING] The requested profile "pom.xml" could not be activated because it does not exist.
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project jpa-dataprovider-simple: Compilation failure: Compilation failure: 
[ERROR] /home/demo/sts-eclipse-wrkspace-simple/jpa-dataprovider-simple/src/main/java/com/d/jpa/dataprovider/mapper/TerminalConfigJpaMapper.java:[4,35] package com.demo.core.entity does not exist
[ERROR] /home/demo/sts-eclipse-wrkspace-simple/jpa-dataprovider-simple/src/main/java/com/demo/jpa/dataprovider/mapper/TerminalConfigJpaMapper.java:[8,59] cannot find symbol
[ERROR]   symbol:   class TerminalConfig
[ERROR]   location: class com.demo.jpa.dataprovider.mapper.TerminalConfigJpaMapper
[ERROR] /home/demo/sts-eclipse-wrkspace-simple/jpa-dataprovider-simple/src/main/java/com/demo/jpa/dataprovider/mapper/TerminalConfigJpaMapper.java:[18,23] cannot find symbol
[ERROR]   symbol:   class TerminalConfig
[ERROR]   location: class com.demo.jpa.dataprovider.mapper.TerminalConfigJpaMapper
[ERROR] /home/demo/sts-eclipse-wrkspace-simple/jpa-dataprovider-simple/src/main/java/com/demo/jpa/dataprovider/gateway/JpaTerminalConfigGatewayImpl.java:[9,35] package com.demo.core.entity does not exist
[ERROR] /home/demo/sts-eclipse-wrkspace-simple/jpa-dataprovider-simple/src/main/java/com/demo/jpa/dataprovider/gateway/JpaTerminalConfigGatewayImpl.java:[10,36] package com.demo.core.gateway does not exist
[ERROR] /home/demo/sts-eclipse-wrkspace-simple/jpa-dataprovider-simple/src/main/java/com/demo/jpa/dataprovider/gateway/JpaTerminalConfigGatewayImpl.java:[14,54] cannot find symbol
[ERROR]   symbol: class TerminalConfigGateway
[ERROR] /home/demo/sts-eclipse-wrkspace-simple/jpa-dataprovider-simple/src/main/java/com/demo/jpa/dataprovider/gateway/JpaTerminalConfigGatewayImpl.java:[24,36] cannot find symbol
[ERROR]   symbol:   class TerminalConfig
[ERROR]   location: class com.demo.jpa.dataprovider.gateway.JpaTerminalConfigGatewayImpl
[ERROR] /home/demo/sts-eclipse-wrkspace-simple/jpa-dataprovider-simple/src/main/java/com/demo/jpa/dataprovider/gateway/JpaTerminalConfigGatewayImpl.java:[24,16] cannot find symbol
[ERROR]   symbol:   class TerminalConfig
[ERROR]   location: class com.demo.jpa.dataprovider.gateway.JpaTerminalConfigGatewayImpl
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

有没有人知道如何解决这个问题？？？

我正在使用：

Spring Tool Suite 4 版本：4.5.0.RELEASE

java-8-openjdk-amd64

行家 3.6.0

springboot 版本 2.1.11 提前致谢。

对我来说有一些新东西，当我查看 jar 文件时，结构是这样的：

spring boot生成的jar结构

出于某种原因，我更改了 eclipse 中的 maven 配置以使用已安装的而不是 embedbeb 的配置，但现在我收到此错误。

[错误] 测试运行：1，失败：0，错误：1，跳过：0，已用时间：1.619 秒 <<< 失败！ - 在 com.oxypora.jpa.dataprovider.JpaDataproviderSimplePosApplicationTests [ERROR] contextLoads(com.oxypora.jpa.dataprovider.JpaDataproviderSimplePosApplicationTests) 中经过的时间：0.015 秒 <<< 错误！ java.lang.IllegalStateException：无法加载ApplicationContext 导致：org.springframework.beans.factory.BeanDefinitionStoreException：无法解析配置类[com.oxypora.jpa.dataprovider.JpaDataproviderSimplePosApplication]； 嵌套异常是 java.io.FileNotFoundException: 类路径资源 [com/oxypora/pos/core/gateway/TerminalConfigGateway.class] 无法打开，因为它不存在引起：java.io.FileNotFoundException: 类路径资源 [com/ oxypora/pos/core/gateway/TerminalConfigGateway.class] 无法打开，因为它不存在

2 个解决方案

解决方案1
 2  2020-01-22 01:27:42

当您有两个或多个 springboot 项目并且希望将它们连接为其他项目的依赖项时，我找到了另一种解决方案。

解决方案是不要使用 spring-boot-maven-plugin，这个插件会覆盖 jar 的正常包，导致你的类和包结构在 BOOT-INF/classes 下移动。

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

在此处输入图片说明

解决方案2
 1  2020-01-15 02:39:12

我解决了这个问题，springboot项目在metainf文件中生成了一个不同的jar结构配置，这样类就不会放在典型的文件夹中。

我所做的是将核心项目更改为一个没有 spring boot 复杂性的简单 maven 项目，现在第二个项目（springboot 一个）编译没有问题。

没有必要将基础项目作为 springboot 项目。

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