GrantedAuthority Null để có được UserDetails về Xuân An

Question

Đây là dịch vụ UserDetails tôi trong an ninh mùa xuân:

public class UserDetail implements UserDetailsService { 

    @Autowired 
    User_service user_service; 

    @Override 
    public UserDetails loadUserByUsername(String userId) throws UsernameNotFoundException { 
     boolean enabled = true; 
     boolean accountNonExpired = true; 
     boolean credentialsNonExpired = true; 
     boolean accountNonLocked = true; 
     com.domain.User user = user_service.findByUserName(userId); 
     return new User(user.getUserId(), user.getPassword(), enabled, 
          accountNonExpired, credentialsNonExpired, 
          accountNonLocked, this.getGrantedAuthorities(user)); 
    } 

    public List<GrantedAuthority> getGrantedAuthorities(com.domain.User user) { 
     List<GrantedAuthority> role_name = null; 
     List<Role> roles = user.getRoles(); 
     try { 
      for(Role role : roles) { 
       role_name.add(new GrantedAuthorityImpl(role.getName())); 
      } 
     } catch(Exception ex) { 
      System.out.println(ex.toString()); 
     } 
     return role_name; 
    } 

} 

Và Tôi nhận được ngoại lệ này:

org.springframework.security.authentication.InternalAuthenticationServiceException: Cannot pass a null GrantedAuthority collection 
at org.springframework.security.authentication.dao.DaoAuthenticationProvider.retrieveUser(DaoAuthenticationProvider.java:110) 
at org.springframework.security.authentication.dao.AbstractUserDetailsAuthenticationProvider.authenticate(AbstractUserDetailsAuthenticationProvider.java:132) 
at org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:156) 
at org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:177) 
at org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter.attemptAuthentication(UsernamePasswordAuthenticationFilter.java:94) 
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:211) 
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110) 
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50) 
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87) 
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192) 
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160) 
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346) 
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259) 
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256) 
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) 
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:316) 
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160) 
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734) 
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673) 
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99) 
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174) 
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:357) 
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:260) 
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:188) 
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:191) 
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:168) 
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:189) 
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119) 
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288) 
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206) 
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136) 
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114) 
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77) 
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:838) 
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:113) 
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115) 
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55) 
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135) 
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:564) 
at  org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:544) 
at java.lang.Thread.run(Thread.java:724) 
Caused by: java.lang.IllegalArgumentException: Cannot pass a null GrantedAuthority collection 
at org.springframework.util.Assert.notNull(Assert.java:112) 
at org.springframework.security.core.userdetails.User.sortAuthorities(User.java:146) 
at org.springframework.security.core.userdetails.User.<init>(User.java:108) 

Trong getGrantedAuthorities phương pháp đối tượng người dùng được tìm thấy, tôi thử nghiệm nó, nhưng khi tôi muốn thêm tên vai trò vào danh sách GrantedAuthority, nó ném một ngoại lệ "Không thể vượt qua một bộ sưu tập null GrantedAuthority". Tại sao GrantedAuthority trả về null?

Tôi khá chắc chắn rằng đối tượng "người dùng" không phải là rỗng, tôi đã kiểm tra nó.

Answer 1

role_name của bạn là rỗng. Hãy thử thay đổi List<GrantedAuthority>role_name=null; bởi List<GrantedAuthority>role_name=new ArrayList<>();.

Ngoài ra, user.getRoles() phải trả về bộ sưu tập trống.