java Autowire不适用于Spring Boot中的自定义UserDetails服务

Question

spring boot应用程序启动，tomcat运行，然后抛出一个错误，最后死掉

错误

运行我的应用程序会出现以下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]

细节

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);
}

}

MyUserDetails：

@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);
}



}

你可以在Git Repo找到完整的源代码

Answer 1

我在commit 3b9a6a2e上尝试了您的项目，但错误实际上不同：

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

这使你的问题与Spring can't create beans重复。解决方案：替换

@Autowired
private MyUserDetailsService userDetailsService;

与

@Autowired
private UserDetailsService userDetailsService;

---

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

Answer 2

将@ComponentScan添加到WebSecurity配置

由于component scanning，这应该连接到MyUserDetailsService，因为它是用@Service注释的

包名可以作为参数传递给注释，以设置组件扫描的范围，例如：

@ComponentScan("com.company.team")

Answer 3

请添加注释：@ComponentScan("") 在主配置类上

如果您想为特定目录创建bean/service，那么您可以在@ComponentScan("package.to.scan")内提供包路径