JPA报错(Name for parameter binding must not be null or empty!)-优快云博客

本文解决了在使用SpringDataJPA时遇到的参数绑定错误问题，详细介绍了如何从冒号语法转换为问号语法，并给出了正确的代码示例。

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转载链接:https://blog.youkuaiyun.com/CCwm0129/article/details/80654058

错误提示

Name for parameter binding must not be null or empty! On JDKs < 8, you need to use @Param for named parameters, on JDK 8 or better, be sure to compile with -parameters.; nested exception is java.lang.IllegalArgumentException: Name for parameter binding must not be null or empty! On JDKs < 8, you need to use @Param for named parameters, on JDK 8 or better, be sure to compile with -parameters.

代码原型

    @Query(value = "select w from Weibo w where w.user.username = :username")
    List<Weibo> searchUserWeibo(@Param("username") String username);

正确写法

    @Query(value = "select w from Weibo w where w.user.username = ?1")
    List<Weibo> searchUserWeibo(@Param("username") String username);

贴上我的错误示范:

贴上我改之后的:

原因分析

不能再用以前的（:）冒号语法，应该写成 (?)问号语法；比如
@Query(value = “select w from Weibo w where w.user.username = ?1 and ?2 and ?3”)
List searchUserWeibo(@Param(“username”) String xx,@Param(“pwd”) String xxx,@Param(“tel”) String xxxx);