使用Lombok @RequiredArgsConstructor启动报错：NewsService未在默认构造器初始化

问题场景 #

Maven项目中使用Lombok的@RequiredArgsConstructor注解生成构造器，构建后target文件夹中能看到构造器已生成且项目打包成功，但启动时触发上述错误；手动编写构造器则可正常运行。

相关代码 #

控制器源码 #

@RestController
@RequestMapping("/news")
@RequiredArgsConstructor
public class NewsController {
    private final NewsService newsService;

    @PostMapping("/create-news")
    public ResponseEntity<?> createNews(CreateNewsDto dto) {
        newsService.createNews(dto);
        return ResponseEntity.status(HttpStatus.CREATED).build();
    }
}

Target文件夹中生成的控制器代码 #

@RestController
@RequestMapping({"/news"})
public class NewsController {
    private final NewsService newsService;

    @PostMapping({"/create-news"})
    public ResponseEntity<?> createNews(CreateNewsDto dto) {
        this.newsService.createNews(dto);
        return ResponseEntity.status(HttpStatus.CREATED).build();
    }

    @Generated
    public NewsController(final NewsService newsService) {
        this.newsService = newsService;
    }
}

原pom.xml配置 #

<?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 https://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>3.4.1</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>org.example</groupId>
    <artifactId>news3</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>news3</name>
    <description>news3</description>
    <url/>
    <licenses>
        <license/>
    </licenses>
    <developers>
        <developer/>
    </developers>
    <scm>
        <connection/>
        <developerConnection/>
        <tag/>
        <url/>
    </scm>
    <properties>
        <java.version>17</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-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
            <scope>provided</scope>
            <version>1.18.30</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.mapstruct</groupId>
            <artifactId>mapstruct</artifactId>
            <version>1.5.5.Final</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <annotationProcessorPaths>
                        <path>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </path>
                        <path>
                            <groupId>org.mapstruct</groupId>
                            <artifactId>mapstruct-processor</artifactId>
                            <version>1.5.5.Final</version>
                        </path>
                    </annotationProcessorPaths>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
<!--                <configuration>-->
<!--                    <excludes>-->
<!--                        <exclude>-->
<!--                            <groupId>org.projectlombok</groupId>-->
<!--                            <artifactId>lombok</artifactId>-->
<!--                        </exclude>-->
<!--                    </excludes>-->
<!--                </configuration>-->
            </plugin>
        </plugins>
    </build>

</project>

已尝试的操作 #

• 修改依赖版本
• 重新构建项目
• 在IntelliJ IDEA中启用注解处理

最终解决方法 #

1. 为JpaRepository添加@Repository注解（导入org.springframework.stereotype.Repository）
2. 更新pom.xml中的maven-compiler-plugin配置，添加lombok-mapstruct-binding依赖并指定插件版本：

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.13.0</version>
    <configuration>
        <annotationProcessorPaths>
            <path>
                <groupId>org.mapstruct</groupId>
                <artifactId>mapstruct-processor</artifactId>
                <version>1.5.5.Final</version>
            </path>
            <path>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>1.18.30</version>
            </path>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok-mapstruct-binding</artifactId>
                <version>0.2.0</version>
            </dependency>
        </annotationProcessorPaths>
        <compilerArgs>
            <arg>-parameters</arg>
        </compilerArgs>
    </configuration>
</plugin>

内容的提问来源于stack exchange，提问作者amirgilman