java - UnsatisfiedDependencyException 在构造函数上 Autowiring 并且设置不起作用

Question

我创建了一个自定义存储库。在这个存储库中，我需要访问标准存储库(findAll)的一些方法，所以我添加了

我使用了 Spring Boot

@EntityScan(basePackageClasses = {UserAgendaApplication.class, Jsr310JpaConverters.class})
@SpringBootApplication
public class UserAgendaApplication {

    public static void main(String[] args) {
        SpringApplication.run(UserAgendaApplication.class, args);
    }
}


public interface UsersRepositoryCustom {
    public Page<Users> customSearch(UserSearch UserSearch, Pageable page);
}



public interface UsersRepository extends JpaRepository<Users, Integer>, JpaSpecificationExecutor<Users>, UsersRepositoryCustom {

}


@Repository
public class UsersRepositoryImpl implements UsersRepositoryCustom {

    @PersistenceContext
    private EntityManager em;

    private final UsersRepository usersRepository;

   @Autowired
   public UsersRepositoryImpl(final UsersRepository usersRepository){
        this.usersRepository=usersRepository;
   }

   @Override
   public Page<Users> customSearch(UserSearch UserSearch, Pageable page) {
         ...
         return usersRepository.findAll(specification, page);

   }

}

@Service
public class UsersServiceImpl implements UsersService {

    @Autowired
    public UsersServiceImpl(UsersRepository usersRepository) {
        this.usersRepository = usersRepository;
    }

    private UsersRepository usersRepository;

    @Override
public Page<Users> customSearch(UserSearch userSearch, Pageable page) {
   usersRepository.customSearch(userSearch, page);
    ... 
}

}

在 Controller 中

@Controller
public class UsersController {

     private final UsersService usersService;

    @Autowired
    public UsersController( final usersService usersService){
        this.usersService=usersService;
    }

}

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'usersController': Unsatisfied dependency expressed through field 'usersService';
nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'usersServiceImpl' defined in file [/home/alpha/Development/project/UserAgenda/build/classes/main/com/alpha/userAgenda/service/UsersServiceImpl.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'usersRepositoryImpl': Bean with name 'usersRepositoryImpl' has been injected into other beans [usersRepository] in its raw version as part of a circular reference, but has eventually been wrapped. This means that said other beans do not use the final version of the bean. This is often the result of over-eager type matching - consider using 'getBeanNamesOfType' with the 'allowEagerInit' flag turned off, for example.

我尝试在 Controller 和 UsersRepositoryImpl 中的 setUsersRepository 上放置 Autowiring ，但得到相同的错误

编辑

public abstract class UsersRepositoryCustom extends SimpleJpaRepository<Users, Integer>

public Page<Users> customSearch(UserSearch userSearch, Pageable page) {
...
}

因为我使用SimpleJpaRepository，所以我不再需要UserRepository，但我需要在UersRepositoryCustom中添加此代码

private final EntityManager entityManager;
private final JpaEntityInformation<Users, Integer> entityInformation;

@Autowired
public UsersRepositoryCustom(final JpaEntityInformation<Users, Integer> entityInformation,
        final EntityManager entityManager) {
    super(entityInformation, entityManager);
    this.entityManager = entityManager;
    this.entityInformation = entityInformation;
}

在实现 UsersService 的 UsersServiceImpl 中，我有

@Autowired
public UsersRepositoryCustom usersRepositoryCustom;

我明白了

.UsersRepositoryImpl 中构造函数的参数 0 需要类型为“org.springframework.data.jpa.repository.support.JpaEntityInformation”的 bean，但无法找到。

编辑2

梯度配置

buildscript {
    ext {
        springBootVersion = '2.0.0.M2'
    }
    repositories {
        mavenCentral()
        maven { url "https://repo.spring.io/snapshot" }
        maven { url "https://repo.spring.io/milestone" }
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
    }
}

apply plugin: 'application'
apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'

mainClassName = 'com.alpha.useragenda.UserAgendaApplication'

version = '0.0.1-SNAPSHOT'
sourceCompatibility = 1.8

repositories {
    mavenCentral()
    maven { url "https://repo.spring.io/snapshot" }
    maven { url "https://repo.spring.io/milestone" }
}

dependencies {
    compile('org.springframework.boot:spring-boot-starter-data-jpa')
    compile('org.springframework.boot:spring-boot-starter-thymeleaf')
    compile('org.springframework.boot:spring-boot-starter-web')

    compile group: 'org.hsqldb', name: 'hsqldb', version: '2.0.0'
    compile group: 'org.postgresql', name: 'postgresql', version: '42.1.1'

    compile group: 'org.webjars', name: 'bootstrap', version: '3.3.7'
    compile group: 'org.webjars.bower', name: 'bootstrap-table', version: '1.11.1'
    compile('org.springframework.boot:spring-boot-devtools')
    testCompile('org.springframework.boot:spring-boot-starter-test')
}

tasks.withType(JavaCompile) {
    options.compilerArgs = ["-Xlint:unchecked", "-Xlint:deprecation", "-parameters"]
}

Answer 1

我认为你最好的办法就是使用这个

package stack.overflow;

import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.CrudRepository;

public interface UsersCrud extends CrudRepository<Users, Long> {

    //My other query prototypes here

    @Query("select c1 from t1")
    public Object customQuery();
}

通过这种方式，您可以以最小的努力获得特殊查询。否则，我建议遵循OP评论中给出的建议(保留存储库并处理服务中的特殊情况