java - 构建 Spring Boot 项目时出错

Question

这个问题已经有答案了:

How to add a dependency to a Spring Boot Jar in another project? (12 个回答)

已关闭 5 年前。

我无法构建我的 springboot 项目，我正在使用另一个 springboot jar 中的类，我将其放置在构建路径上，它通过 eclipse 在本地运行，但没有构建，这是错误

"[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building ContentManagementService 0.0.1
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ contentmanagementapi ---
[INFO] Deleting /home/bhargavgundu/git/contentmanagementservice/target
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ contentmanagementapi ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] Copying 5 resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ contentmanagementapi ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 42 source files to /home/bhargavgundu/git/contentmanagementservice/target/classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] /home/bhargavgundu/git/contentmanagementservice/src/main/java/com/conduiraonline/controller/ContentManagementControllerV1.java:[32,31] package com.conduiraonline.apis does not exist
[ERROR] /home/bhargavgundu/git/contentmanagementservice/src/main/java/com/conduiraonline/controller/ContentManagementControllerV1.java:[42,31] package com.conduiraonline.daos does not exist
[ERROR] /home/bhargavgundu/git/contentmanagementservice/src/main/java/com/conduiraonline/controller/ContentManagementControllerV1.java:[52,35] cannot find symbol
  symbol:   class SlackService
  location: package com.conduiraonline.services
[ERROR] /home/bhargavgundu/git/contentmanagementservice/src/main/java/com/conduiraonline/controller/ContentManagementControllerV1.java:[85,17] cannot find symbol
  symbol:   class UserDAO
  location: class com.conduiraonline.controller.ContentManagementControllerV1
[ERROR] /home/bhargavgundu/git/contentmanagementservice/src/main/java/com/conduiraonline/controller/ContentManagementControllerV1.java:[87,17] cannot find symbol
  symbol:   class SlackService
  location: class com.conduiraonline.controller.ContentManagementControllerV1
[ERROR] /home/bhargavgundu/git/contentmanagementservice/src/main/java/com/conduiraonline/controller/ContentManagementControllerV1.java:[95,17] cannot find symbol
  symbol:   class LicenseV5
  location: class com.conduiraonline.controller.ContentManagementControllerV1
[INFO] 6 errors 
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.917s
[INFO] Finished at: Tue Sep 12 17:16:44 IST 2017
[INFO] Final Memory: 24M/396M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project contentmanagementapi: Compilation failure: Compilation failure:
[ERROR] /home/bhargavgundu/git/contentmanagementservice/src/main/java/com/conduiraonline/controller/ContentManagementControllerV1.java:[32,31] package com.conduiraonline.apis does not exist
[ERROR] /home/bhargavgundu/git/contentmanagementservice/src/main/java/com/conduiraonline/controller/ContentManagementControllerV1.java:[42,31] package com.conduiraonline.daos does not exist
[ERROR] /home/bhargavgundu/git/contentmanagementservice/src/main/java/com/conduiraonline/controller/ContentManagementControllerV1.java:[52,35] cannot find symbol
[ERROR] symbol:   class SlackService
[ERROR] location: package com.conduiraonline.services
[ERROR] /home/bhargavgundu/git/contentmanagementservice/src/main/java/com/conduiraonline/controller/ContentManagementControllerV1.java:[85,17] cannot find symbol
[ERROR] symbol:   class UserDAO
[ERROR] location: class com.conduiraonline.controller.ContentManagementControllerV1
[ERROR] /home/bhargavgundu/git/contentmanagementservice/src/main/java/com/conduiraonline/controller/ContentManagementControllerV1.java:[87,17] cannot find symbol
[ERROR] symbol:   class SlackService
[ERROR] location: class com.conduiraonline.controller.ContentManagementControllerV1
[ERROR] /home/bhargavgundu/git/contentmanagementservice/src/main/java/com/conduiraonline/controller/ContentManagementControllerV1.java:[95,17] cannot find symbol
[ERROR] symbol:   class LicenseV5
[ERROR] location: class com.conduiraonline.controller.ContentManagementControllerV1
[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
"

无论我在哪里使用外部 jar 中的类/函数，它都会显示错误，有人可以帮忙吗？我的 POM-

这是我的 POM

<?xml version="1.0" encoding="UTF-8"?>
<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>com.conduiraonline</groupId>
    <artifactId>contentmanagementapi</artifactId>
    <version>0.0.1</version>
    <packaging>jar</packaging>

    <name>ContentManagementService</name>
    <description>ContentManagementService</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.3.3.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax.mail/mail -->
        <dependency>
            <groupId>javax.mail</groupId>
            <artifactId>mail</artifactId>
            <version>1.4</version>
        </dependency>
        <dependency>
            <groupId>com.conduiraonline</groupId>
            <artifactId>licenseapi</artifactId>
            <version>0.0.1</version>
            <classifier>exec</classifier>
        </dependency>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>21.0</version>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
        </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>
                <configuration>
                    <executable>true</executable>
                </configuration>
            </plugin>
        </plugins>
    </build>


</project>

Answer 1

TL;DR

删除<classifier>exec</classifier>来自对 com.conduiraonline:licenseapi 的依赖

更多详细信息...

您使用 <dependency> 是正确的表达 com.conduiraonline:contentmanagementapi 之间的关系和com.conduiraonline:licenseapi 。或者换句话说；这是告诉 Maven 模块 com.conduiraonline:contentmanagementapi 的正确方式取决于模块com.conduiraonline:licenseapi .

但是，您已经定义了对 com.conduiraonline:licenseapi 的依赖项如:

    <dependency>
        <groupId>com.conduiraonline</groupId>
        <artifactId>licenseapi</artifactId>
        <version>0.0.1</version>
        <classifier>exec</classifier>
    </dependency>

classifier告诉 Maven 寻找名为 licenseapi.exec 的文件在文件夹com/conduiraonline中在您的本地 Maven 存储库中(如果失败，请尝试从您在 Maven settings.xml 或此 pom.xml 中配置的任何远程存储库解决该依赖关系)。

我认为没有名为 licenseapi.exec 的文件在文件夹com/conduiraonline中在您本地的 Maven 存储库中，因为 exec对于 Maven Artifact 来说是一个非常不寻常的分类器。

只要有 com.conduiraonline:licenseapi 的 JAR版本0.0.1已安装在您的本地 Maven 存储库中，此依赖项将起作用:

    <dependency>
        <groupId>com.conduiraonline</groupId>
        <artifactId>licenseapi</artifactId>
        <version>0.0.1</version>
    </dependency>

您安装 com.conduiraonline:licenseapi 的 JAR版本0.0.1在本地 Maven 存储库中运行 mvn clean install对于licenseapi模块(假设 licenseapi 模块的 pom.xml 具有 <version>0.0.1</version> )。