hibernate之persistence錯誤

錯誤碼：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory

 

上述錯誤碼nested exception is javax.persistence.PersistenceException可知是實體類實例化的時候報錯，所以應該查看實體類是否有注解、字段書寫的錯誤，我的是因為之前做關聯，后面去掉了，但注解沒有去掉導致，出錯代碼：

    @NotNull
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "user_id", nullable = false)
    private long userId;

之前是：

    @NotNull
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "user_id", nullable = false)
    private User user;

正確的是：

　　@JoinColumn(name = "user_id", nullable = false)
　　private long userId;