Java 缺少SpringBean依赖项，但已实例化它的日志和调试状态

我使用的是Spring Boot 1.3.4.RELEASE和Spring 4.2.6.RELEASE

我有以下课程：

@Component
class ServerRunner implements Runnable {

与构造器一起：

 @Autowired
  ServerRunner(@Value(HEARTBEAT_SECONDS) final long secondsBetweenHeartbeats,
               final ServerSocket socket,
               final PlayerRepository playerRepository,
               final DeckProcessor deckProcessor) {
    this.serverSocket = socket;
    this.maintainer = new Maintainer(secondsBetweenHeartbeats);
    this.playerRepository = playerRepository;
    final ExecutorService executorService = newCachedThreadPool();
    executorService.execute(this);
    this.running = true;

    this.deckProcessor = deckProcessor;
    executorService.execute(maintainer);
  }

当我启动应用程序时，它找不到依赖项

DeckProcessor

@Component
class DeckProcessor extends AbstractPlayerProcessor {
  private final DeckRepository repository;

  @Autowired(required = true)
  DeckProcessor(final DeckRepository repository) {
    super(QUERY_DECKS);
    this.repository = repository;
  }

将引发以下异常：

  23:12:42 ERROR org.springframework.boot.SpringApplication - Application startup failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'serverRunner' defined in file [GameServer\arml-server\build\classes\main\com\arml\services\ServerRunner.class]: Unsatisfied dependency expressed through constructor argument with index 3 of type [com.arml.services.DeckProcessor]: No qualifying bean of type [com.arml.services.DeckProcessor] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.arml.services.DeckProcessor] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:185) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1143) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1046) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839) ~[spring-context-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538) ~[spring-context-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:766) ~[spring-boot-1.3.4.RELEASE.jar:1.3.4.RELEASE]
    at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:361) [spring-boot-1.3.4.RELEASE.jar:1.3.4.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) [spring-boot-1.3.4.RELEASE.jar:1.3.4.RELEASE]
    at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:134) [spring-boot-1.3.4.RELEASE.jar:1.3.4.RELEASE]
    at com.arml.ArmlServer.main(ArmlServer.java:21) [main/:?]
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.arml.services.DeckProcessor] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1373) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1119) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1014) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:813) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    ... 17 more

但日志明确指出：

16:44:05 DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean deckProcessor
16:44:05 DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating instance of bean deckProcessor
16:44:05 DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Autowiring by type from bean name 'deckProcessor' via constructor to bean named 'deckRepository'
16:44:05 DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Eagerly caching bean 'deckProcessor' to allow for resolving potential circular references
16:44:05 DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Finished creating instance of bean 'deckProcessor'

这两个类驻留在同一个包中

我做错了什么？我已经调试了几个小时，找不到解决方案

SpringBoot应用程序：

@EnableJpaRepositories(basePackages = "com.arml.persistence.repositories")
@EnableTransactionManagement
@SpringBootApplication
public class ArmlServer {

  public static void main(final String[] args) {
    new SpringApplicationBuilder()
        .web(false)
        .bannerMode(OFF)
        .sources(ArmlServer.class)
        .run(args);
  }
}

配置：

@Configuration
public class ArmlConfiguration {
  private static final Base64.Decoder DECODER = getDecoder();

  @Bean
  public ServerSocket armlSslSocket(@Value("${arml.server.bind-address}") final String bindAddress,
                                    @Value("${arml.server.port}") final int port,
                                    @Value("${arml.ssl.password}") final String password)
      throws IOException {
    final String keyPass = new String(DECODER.decode(password), UTF_8);
    return createServerSocket(bindAddress, port, keyPass);
  }

  @Bean
  public DataSource dataSource(final DataSourceProperties dataSourceProperties)
      throws PropertyVetoException {
    final ComboPooledDataSource dataSource = new ComboPooledDataSource();
    dataSource.setDriverClass(dataSourceProperties.getDriverClassName());
    dataSource.setUser(dataSourceProperties.getUsername());
    dataSource.setPassword(new String(DECODER.decode(dataSourceProperties.getPassword()), UTF_8));
    dataSource.setJdbcUrl(dataSourceProperties.getUrl());
    return dataSource;
  }
}

编辑：

编辑2：我确实试过双子座基思的建议。

ServerRunner

现在看起来像这样（为了简洁起见，我删除了一些常量/方法）：

但例外情况仍然存在：

07:12:36 ERROR org.springframework.boot.SpringApplication - Application startup failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'serverRunner': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.arml.services.DeckProcessor com.arml.services.ServerRunner.deckProcessor; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.arml.services.DeckProcessor] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839) ~[spring-context-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538) ~[spring-context-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:766) ~[spring-boot-1.3.4.RELEASE.jar:1.3.4.RELEASE]
    at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:361) [spring-boot-1.3.4.RELEASE.jar:1.3.4.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) [spring-boot-1.3.4.RELEASE.jar:1.3.4.RELEASE]
    at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:134) [spring-boot-1.3.4.RELEASE.jar:1.3.4.RELEASE]
    at com.arml.ArmlServer.main(ArmlServer.java:20) [main/:?]
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.arml.services.DeckProcessor com.arml.services.ServerRunner.deckProcessor; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.arml.services.DeckProcessor] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:573) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    ... 15 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.arml.services.DeckProcessor] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1373) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1119) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1014) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:545) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    ... 15 more

我还重新检查了注释，它们是：

import org.springframework.stereotype.Component;

一旦我移除

deck处理器

，构造函数注入就会工作。这真让人困惑

编辑3： 我是个白痴。参数应该具有接口类型。将构造函数更改为：

  @Autowired
  ServerRunner(@Value(HEARTBEAT_SECONDS) final long secondsBetweenHeartbeats,
               final ServerSocket armlSslSocket,
               final PlayerRepository playerRepository,
               final Processor<ServerClientHandler> deckProcessor) {
    this.serverSocket = armlSslSocket;
    this.maintainer = new Maintainer(secondsBetweenHeartbeats);
    this.playerRepository = playerRepository;
    final ExecutorService executorService = newCachedThreadPool();
    executorService.execute(this);
    this.running = true;

    this.deckProcessor = deckProcessor;
    executorService.execute(maintainer);
  }

@Autowired
ServerRunner（@Value（心跳\u秒）心跳之间的最后长秒，
最终服务器插座armlSslSocket，
最后一名球员位置球员位置，
最终处理器（主处理器）{
this.serverSocket=armlSslSocket；
this.mainter=新的维护者（心跳之间的秒数）；
this.playerRepository=playerRepository；
final ExecutorService ExecutorService=newCachedThreadPool（）；
执行服务。执行（本）；
这是真的；
this.deckProcessor=deckProcessor；
executorService.execute（维护者）；
}

---

它工作正常。

这似乎是一个初始化依赖性问题。请尝试在类

ServerRunner

上使用

@DependsOn

和

@Component

，如下所示：

@DependsOn(value = "deckProcessor")
@Component

value

表示

DeckProcessor

的bean名称，默认情况下总是

DeckProcessor

。但是，您可以通过在

@Component（value='nameOfYourBean'）

处指定名称来命名它

在您的情况下，构造函数需要自动连接一个

DeckProcessor

，这对于实例化

ServerRunner

bean来说太严格了，这意味着在创建

ServerRunner

时必须有一个

DeckProcessor

bean。否则，无法实例化

ServerRunner

。但是，您可以通过创建

@PostConstruct

方法初始化

ServerRunner

，并将代码从构造函数移到其中。例如：

@Value(HEARTBEAT_SECONDS)
long secondsBetweenHeartbeats;
@Autowired
ServerSocket socket;
@Autowired
PlayerRepository playerRepository;
@Autowired
DeckProcessor deckProcessor;
@PostConstruct
public void init() {
  this.serverSocket = socket;
  this.maintainer = new Maintainer(secondsBetweenHeartbeats);
  this.playerRepository = playerRepository;
  final ExecutorService executorService = newCachedThreadPool();
  executorService.execute(this);
  this.running = true;

  this.deckProcessor = deckProcessor;
  executorService.execute(maintainer);
}

---

此时，spring可以实例化所有bean，然后继续逐个初始化它们。它应该可以工作。

添加您的项目结构，并发布完整的stacktrace。谢谢您的帮助！不幸的是，你的两个建议都不起作用。

init

方法必须是no-arg方法，因此根本不起作用。我确实删除了参数，并使用一个

@Autowired

注释使字段成为非最终字段，但它无法找到

deckProcessor

。我会更新这个问题。好的，你可以@Autowired它作为类成员而不是参数。我就是这么做的。而且它也不起作用（我已经更新了这个问题。这里有两个解决方案，一个是

@DependsOn

，另一个是

@PostConstruct

。如果您正在使用

@PostConstruct

，请删除类

ServerRunner

上的

@DependsOn

注释。如果它仍然不起作用，如果您不介意，请在github上发布您的项目，它是sh。）会有用的。

@Value(HEARTBEAT_SECONDS)
long secondsBetweenHeartbeats;
@Autowired
ServerSocket socket;
@Autowired
PlayerRepository playerRepository;
@Autowired
DeckProcessor deckProcessor;
@PostConstruct
public void init() {
  this.serverSocket = socket;
  this.maintainer = new Maintainer(secondsBetweenHeartbeats);
  this.playerRepository = playerRepository;
  final ExecutorService executorService = newCachedThreadPool();
  executorService.execute(this);
  this.running = true;

  this.deckProcessor = deckProcessor;
  executorService.execute(maintainer);
}