java - Spring Data 2.0.x AuditorAware getCurrentUser 方法抛出 AbstractMethodError

Question

我正在尝试实现 AuditorAware进入我的网络应用程序。以下是我的库版本列表:

• jsf 2.2.13
• hibername 5.1.3.Final
• Spring 5.0.3.RELEASE
• spring-data 2.0.3.RELEASE
• spring-security 5.0.1.RELEASE

这是我的持久性配置文件:

@Configuration
@EnableJpaAuditing(auditorAwareRef = "auditorAware")
@EnableAspectJAutoProxy(proxyTargetClass = true)
@EnableTransactionManagement
public class PersistenceContext
{
     @Bean
     public AuditorAware<AccountModel> auditorAware()
     {
         return new AuditorAwareImpl();
     }
}

这是我的 AuditorAwareImpl 类:

public class AuditorAwareImpl implements AuditorAware<AccountModel>
{
    @Override
    public Optional<AccountModel> getCurrentAuditor()
    {
        return Optional.ofNullable((AccountModel) SecurityContextHolder.getContext().getAuthentication().getPrincipal());
    }
}

账户模型:

@Entity(name = "Account")
@Table(name = "account")
public class AccountModel extends BaseModel implements UserDetails
{
    private static final long serialVersionUID = -4792614546550769652L;

    @Column(name = "username", length = 20, nullable = false)
    private String username;

    @Column(name = "password", length = 100, nullable = false)
    private String password;

    @Column(name = "email", length = 100, nullable = false)
    private String email;

    @Column(name = "accPackage", length = 2, nullable = false)
    private String accPackage;

    @OneToMany(mappedBy = "account", cascade = CascadeType.ALL)
    private Set<RoleModel> role = new HashSet<RoleModel>();

    @Transient
    private transient Set<GrantedAuthority> authorities;
}

基础模型:

@MappedSuperclass
@EntityListeners(AuditingEntityListener.class)
public abstract class BaseModel implements Serializable
{
    private static final long serialVersionUID = -8027746305948051121L;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id", nullable = false, updatable = false)
    private Integer id;

    @CreatedBy
    @ManyToOne
    @JoinColumn(name = "createdBy", nullable = true, updatable = false)
    private AccountModel createdBy;

    @CreatedDate
    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "dateCreated", nullable = false, updatable = false)
    private Date dateCreated;

    @LastModifiedBy
    @ManyToOne
    @JoinColumn(name = "modifiedBy", insertable = false)
    private AccountModel modifiedBy;

    @LastModifiedDate
    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "dateModified", insertable = false)
    private Date dateModified;

    @Version
    @Column(name = "verCtrl", nullable = false)
    private Integer version;
}

当我尝试持久化一个对象时，将抛出 AbstractMethodError:

Caused by: java.lang.AbstractMethodError: com.project.core.AuditorAwareImpl.getCurrentAuditor()Ljava/lang/Object;
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
    at com.sun.proxy.$Proxy71.getCurrentAuditor(Unknown Source)
    at org.springframework.data.auditing.AuditingHandler.touchAuditor(AuditingHandler.java:166)
    at org.springframework.data.auditing.AuditingHandler.touch(AuditingHandler.java:145)
    at org.springframework.data.auditing.AuditingHandler.markCreated(AuditingHandler.java:125)
    at org.springframework.data.jpa.domain.support.AuditingEntityListener.touchForCreate(AuditingEntityListener.java:83)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.hibernate.jpa.event.internal.jpa.ListenerCallback.performCallback(ListenerCallback.java:35)
    ... 124 more

更新

在我将我的 Spring Data 从 2.x 更改为 1.x 后，它可以正常工作，不再有异常。我认为问题出在 getCurrentUser() 的返回数据类型上方法。在 1.x 中，返回数据类型只是您自定义的 UserDetails对象，但在 2.x 中，返回数据类型为 Optional<CustomModel> .会不会是错误的原因？

Answer 1

是的，此错误的原因是 getCurrentUser() 的返回数据类型发生了变化方法。在 2.x 版本中，这被更改为 Optional(在 1.x 版本中，返回类型只是 T)。有两种方法可以解决这个问题:

1. 将 Spring Data 从 2.x 降级到 1.x

2. 但是，由于我必须将 Spring Data 保留在 2.x 版本上，所以我只是将代码从

   @Override
public String getCurrentAuditor() {
return currentUser();
}

   到

   @Override
public Optional<String> getCurrentAuditor() {
return Optional.of(currentUser());
}