java - 用户详细信息和 hibernate 异常

Question

我正在尝试启动我的网络应用程序，但出现异常:

java.util.Collection, at table: user, for columns: [org.hibernate.mapping.Column(authorities)]

我对聚合代码感到抱歉，但是这样需要更少的代码和更多的细节。

这是我的用户实体:

@Entity
@Table(name = "user")
public class User extends BaseEntity implements UserDetails {
    private String email;
    private String password;
    private Set<Role> roles;
    @Column(name = "email", nullable = false, unique = true)
    public String getEmail() {return email;}
    public void setEmail(String email) {this.email = email;}
    @Column(name = "password", nullable = false)
    public String getPassword() {return password;}
    public void setPassword(String password) {this.password = password;}
    @ManyToMany
    @JoinTable(name = "user_role",
            joinColumns = {@JoinColumn(name = "user", referencedColumnName = "id")},
            inverseJoinColumns = {@JoinColumn(name = "role", referencedColumnName = "name")})
    public Set<Role> getRoles() { return roles; }
    public void setRoles(Set<Role> role) {this.roles = role;}
    @Override
    public Collection<? extends GrantedAuthority> getAuthorities() {return roles;}
    @Override
    public String getUsername() { return email; }
    @Override
    public boolean isAccountNonExpired() {return true; }
    @Override
    public boolean isAccountNonLocked() { return true; }
    @Override
    public boolean isCredentialsNonExpired() {  return true; }
    @Override
    public boolean isEnabled() {  return true; }
}

它是角色实体:

@Entity
@Table(name = "Role")
public class Role implements GrantedAuthority, Serializable {
    private String name;
    @Id
    @Column(name = "name")
    public String getName() {return name;}
    public void setName(String name) { this.name = name; }
    @Override
    public String getAuthority() {return name;}
}

Answer 1

我找到了这个问题的原因。如果我们将注释放在 getters 之上，那么 Hibernate 会自动尝试为其他未注释的 getters 创建列。有两种变体:

1) 将所有注释移至字段上方。

2) 将 @Transient 添加到所有非列的 getter 中。