Spring security Userdetails不能转换为我自己的用户实现

Question

我有一个User类，它实现了Spring SecurityUser细节。但是，在登录请求的身份验证期间，它会给出一个ClassCastException，User细节不能强制转换为我的User类。

完整的错误:

java.lang.ClassCastException：类org.springframework.security.core.userdetails.User不能转换为类nl.teamrepositories.vliegmaatschappij.security.domain.User（org.springframework.security.core.userdetails.User在loader'app'的未命名模块中；nl.teamrepositories.vliegmaatschappij.security.domain.User在loaderorg.springframework.boot.devtools.restart.classloader.RestartClassLoader@6ef8cb6的未命名模块中）

用户：

package nl.teamrepositories.vliegmaatschappij.security.domain;

import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;

import javax.persistence.*;
import java.util.Collection;
import java.util.List;

@Entity
@Table(name = "users")
@Getter @Setter @NoArgsConstructor
public class User implements UserDetails {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @Column(nullable = false, unique = true)
    private String firstName;
    private String lastName;
    private String username;
    private String password;

    private boolean enabled;
    private boolean tokenExpired;

    public User(String firstName, String lastName, String username, String password) {
        this.firstName = firstName;
        this.lastName = lastName;
        this.username = username;
        this.password = password;
    }

    @ManyToMany
    @JoinTable(
            name = "users_roles",
            joinColumns = @JoinColumn(
                    name = "user_id", referencedColumnName = "id"),
            inverseJoinColumns = @JoinColumn(
                    name = "role_id", referencedColumnName = "id"))
    private Collection<Role> roles;

    @Override
    public Collection<? extends GrantedAuthority> getAuthorities() {
        return List.of(new SimpleGrantedAuthority("ROLE_USER"));
    }

    @Override
    public String getUsername() {
        return username;
    }

    @Override
    public boolean isAccountNonExpired() {
        return true;
    }

    @Override
    public boolean isAccountNonLocked() {
        return true;
    }

    @Override
    public boolean isCredentialsNonExpired() {
        return true;
    }
    
    @Override
    public boolean isEnabled() {
        return true;
    }
}

在JwtAuthentiationFilter中：

@Override
protected void successfulAuthentication(HttpServletRequest request, HttpServletResponse response,
                                        FilterChain filterChain, Authentication authentication) {
    User user = (User) authentication.getPrincipal(); // this is where the error occurs
    // more code
}

我不明白为什么我的< code>User类不能转换为Spring的< code>UserDetails类。

我应该改变什么？

提前感谢。

Answer 1

在JwtAuthentiationFilter中检查您的导入。我猜您正在使用importorg.springframework.security.core.userdetails.User而不是您自己的类importnl.teamrepositories.vliegmaatschappij.security.domain.User：

import nl.teamrepositories.vliegmaatschappij.security.domain.User;
(...)

public class JwtAuthenticationFilter {
    (...)

    @Override
    protected void successfulAuthentication(HttpServletRequest request, HttpServletResponse response,
                                            FilterChain filterChain, Authentication authentication) {
        User user = (User) authentication.getPrincipal(); // this is where the error occurs
        // more code
    }
}

在这里或代码中的其他地方，您使用了错误的< code>User类(Spring one而不是您的类)。