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workspace

我收到了一个关于不存在项目的烦人消息-所以通过我看到的一个解决方案，我已经删除了。工作区中的元数据文件夹。

从那时起，我试图构建我的项目（到目前为止它一直运行良好），maven使用“构建成功”运行该过程，但任何包都没有安装，并且按照顺序，我得到了很多编译错误。

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场所，不仅如此，所以这是一般性的问题。（我还尝试创建新的工作区，并将项目导入到工作区-未解决）。

Answer 1

解决方案：

谢谢大家，这个@Dusayanta Prasad解决方案解决了我的问题：

删除的内容。m2文件夹并尝试maven更新-

步骤2-

出于某种原因，Eclipse仍然在类上显示错误警告，似乎他没有阅读Lombok，但它运行正常。所以我做了这个解决方案（也试图删除、导入和删除。项目-那些没有帮助）并安装龙目岛插件。

然后在新的maven构建干净安装后，和maven

Answer 2

转到您的项目文件夹-

现在转到eclipse，按ctrl f5（maven更新）并执行。

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罐子的问题。