Autowire 不适用于 Spring Boot 中的自定义 UserDetailsS​​ervice

Question

spring 引导应用程序启动，tomcat 运行，然后抛出错误，最后死掉。

错误

运行 我的应用程序给我这个 Autowired 错误：

2016-07-29 02:18:24.737 ERROR 44715 --- [  restartedMain] o.s.boot.SpringApplication               : Application startup failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'webSecurityConfig': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private myapp.MyUserDetailsService myapp.WebSecurityConfig.userDetailsService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [myapp.MyUserDetailsService] 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-4.2.7.RELEASE.jar:4.2.7.RELEASE]

详情

我的安全配置：

@Configuration
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
@Override
protected void configure(HttpSecurity http) throws Exception {
        http
        .authorizeRequests()
        .antMatchers("/", "/register").permitAll()
        .anyRequest().authenticated()
        .and()
        .formLogin()
        .loginPage("/")
        .permitAll()
        .and()
        .logout()
        .permitAll();
}

@Autowired
private MyUserDetailsService userDetailsService;

@Autowired
public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService);
}

}

我的用户详细信息：

@Service
@Transactional
public class MyUserDetailsService implements UserDetailsService {

@Autowired
private UserRepository userRepository;


public MyUserDetailsService() {
        super();
}

@Override
public UserDetails loadUserByUsername(String userName)
throws UsernameNotFoundException {
        User user = userRepository.findByUserName(userName);
        if (user == null) {
                return null;
        }
        List<GrantedAuthority> auth = AuthorityUtils
                                      .commaSeparatedStringToAuthorityList("ROLE_USER");
        String password = user.getPassword();
        return new org.springframework.security.core.userdetails.User(userName, password,
                                                                      auth);
}



}

您可以在 Git Repo

找到完整的源代码

Answer 1

将 @ComponentScan 添加到 WebSecurityConfig。

由于 component scanning，这应该连接到 MyUserDetailsS​​ervice 中，因为它被注释为 @Service。

可以将包名作为参数传递给注解来设置组件扫描的范围，例如：

@ComponentScan("com.company.team")

Answer 2

从 MyUserDetailsService 中删除 @Transactional 成功了。不知道为什么。如果有人有解释，请post，我会将其标记为答案。

仔细检查，这确实是正确的，如果您想自己检查，请检查上面列出的存储库的提交 840f0753bdca1592d9070c74bc87f30e8e2f87a7，并进行测试。

并停止否决这个答案，因为你认为它是不正确的。

Answer 3

请添加注释：@ComponentScan("") 在主配置上 class.

如果你想为特定目录创建bean/service那么你可以在@ComponentScan("package.to.scan")

中给出包路径

Answer 4

我在提交 3b9a6a2e 时尝试了你的项目，错误实际上是不同的：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'webSecurityConfig': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private myapp.MyUserDetailsService myapp.WebSecurityConfig.userDetailsService; nested exception is java.lang.IllegalArgumentException: Can not set myapp.MyUserDetailsService field myapp.WebSecurityConfig.userDetailsService to com.sun.proxy.$Proxy80

这使您的问题与 Spring can't create beans 重复。解决方法：替换

@Autowired
private MyUserDetailsService userDetailsService;

和

@Autowired
private UserDetailsService userDetailsService;

---

您的解决方案（删除 @Transactional）有效，因为如果没有 @Transactional，Spring 就没有理由将 MyUserDetailsService 包装在代理中。