java - Maven-Spring-boot-Eclipse 构建成功，但未安装软件包(Lombok)

Question

场景:
我在新计算机上安装了 Eclipse，并使用了旧版本的工作区>

我收到一条关于不存在项目的恼人消息 - 因此通过我看到的一个解决方案，我已从工作区中删除了 .metadata 文件夹。 >>

从那时起，我尝试构建我的项目(到目前为止一直运行良好)，ma​​ven 使用“Build Success”运行该过程，但尚未安装任何包，并按顺序进行我遇到很多编译错误。

我的 pom.xml:

    <?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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.lingar</groupId>
    <artifactId>SocialEventsTrying1</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>SocialEventsTrying1</name>
    <description>Demo project for Spring Boot</description>

    <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>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-rest</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <!-- Use MySQL Connector-J -->

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version><!-- this version  solve the time issue -->
        </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>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>
    </dependencies>

    <build> 
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <!-- tag::frontend-maven-plugin[] -->
            
            <!-- end::frontend-maven-plugin[] -->
        </plugins>
    </build>
    

</project>

Maven 控制台日志:

[INFO] Scanning for projects...
[INFO] 
[INFO] -------------------< com.lingar:SocialEventsTrying1 >-------------------
[INFO] Building SocialEventsTrying1 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:3.1.0:clean (default-clean) @ SocialEventsTrying1 ---
[INFO] Deleting C:\izhar\files\eclipse-workspaces\Spring-Hibernate\HibernateStudying\target
[INFO] 
[INFO] --- maven-resources-plugin:3.1.0:resources (default-resources) @ SocialEventsTrying1 ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] Copying 59 resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.8.0:compile (default-compile) @ SocialEventsTrying1 ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 31 source files to C:\izhar\files\eclipse-workspaces\Spring-Hibernate\HibernateStudying\target\classes
[INFO] /C:/izhar/files/eclipse-workspaces/Spring-Hibernate/HibernateStudying/src/main/java/com/lingar/SocialEvents/tutorial/services/TutorialService.java: C:\izhar\files\eclipse-workspaces\Spring-Hibernate\HibernateStudying\src\main\java\com\lingar\SocialEvents\tutorial\services\TutorialService.java uses or overrides a deprecated API.
[INFO] /C:/izhar/files/eclipse-workspaces/Spring-Hibernate/HibernateStudying/src/main/java/com/lingar/SocialEvents/tutorial/services/TutorialService.java: Recompile with -Xlint:deprecation for details.
[INFO] /C:/izhar/files/eclipse-workspaces/Spring-Hibernate/HibernateStudying/src/main/java/com/lingar/SocialEvents/tutorial/services/TutorialService.java: C:\izhar\files\eclipse-workspaces\Spring-Hibernate\HibernateStudying\src\main\java\com\lingar\SocialEvents\tutorial\services\TutorialService.java uses unchecked or unsafe operations.
[INFO] /C:/izhar/files/eclipse-workspaces/Spring-Hibernate/HibernateStudying/src/main/java/com/lingar/SocialEvents/tutorial/services/TutorialService.java: Recompile with -Xlint:unchecked for details.
[INFO] 
[INFO] --- maven-resources-plugin:3.1.0:testResources (default-testResources) @ SocialEventsTrying1 ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory C:\izhar\files\eclipse-workspaces\Spring-Hibernate\HibernateStudying\src\test\resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.8.0:testCompile (default-testCompile) @ SocialEventsTrying1 ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to C:\izhar\files\eclipse-workspaces\Spring-Hibernate\HibernateStudying\target\test-classes
[INFO] 
[INFO] --- maven-surefire-plugin:2.22.1:test (default-test) @ SocialEventsTrying1 ---
[INFO] 
[INFO] --- maven-jar-plugin:3.1.1:jar (default-jar) @ SocialEventsTrying1 ---
[INFO] Building jar: C:\izhar\files\eclipse-workspaces\Spring-Hibernate\HibernateStudying\target\SocialEventsTrying1-0.0.1-SNAPSHOT.jar
[INFO] 
[INFO] --- spring-boot-maven-plugin:2.1.3.RELEASE:repackage (repackage) @ SocialEventsTrying1 ---
[INFO] Replacing main artifact with repackaged archive
[INFO] 
[INFO] --- maven-install-plugin:2.5.2:install (default-install) @ SocialEventsTrying1 ---
[INFO] Installing C:\izhar\files\eclipse-workspaces\Spring-Hibernate\HibernateStudying\target\SocialEventsTrying1-0.0.1-SNAPSHOT.jar to C:\Users\Lingar\.m2\repository\com\lingar\SocialEventsTrying1\0.0.1-SNAPSHOT\SocialEventsTrying1-0.0.1-SNAPSHOT.jar
[INFO] Installing C:\izhar\files\eclipse-workspaces\Spring-Hibernate\HibernateStudying\pom.xml to C:\Users\Lingar\.m2\repository\com\lingar\SocialEventsTrying1\0.0.1-SNAPSHOT\SocialEventsTrying1-0.0.1-SNAPSHOT.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  20.691 s
[INFO] Finished at: 2020-04-28T10:21:26+03:00
[INFO] ------------------------------------------------------------------------

Eclipse 版本:

面向企业 Java 开发人员的 Eclipse IDE。

版本:2020-03 (4.15.0)

顺便说一句 -它也发生在其他项目和其他工作空间中，不仅限于此，所以这是普遍问题。 (我还尝试创建新的工作区并将项目导入到那里 - 没有解决)。

Answer 1

转到您的项目文件夹 -> 打开终端/cmd -> 执行 mvn clean

现在进入 eclipse，按 ctrl+f5(maven update)然后执行。

然后再次构建您的项目。并检查错误是否仍然存在。

这将解决您无法下载所需 jar 的问题。