Java JPA查询上的pojo映射

假设我有一个关于jpa的问题，比如

@Query(
        value = "SELECT user_no, count(*) " +
                "FROM users " +
                "where status = 'VCS' group by user_task_no",
        nativeQuery = true
)
List<Object> getUsers();

然而，我希望结果是

[
    {
        "user_no": 100,
        "count": 2
    },
    {
        "user_no": 200,
        "count": 2
    },
    {
        "user_no": 300,
        "count": 3
    }
]

我试着让一门课像

public class UserCount {
    private Long userNo;
    private Long count;

    public UserCount(Long userNo, Long count) {
        this.userNo = userNo;
        this.count = count;
    }
}

成功了

@Query(
        value = "SELECT new fullpackage.UserCount(user_no, count(*)) " +
                "FROM users " +
                "where status = 'VCS' group by user_task_no",
        nativeQuery = true
)
List<UserCount> getUsers();

你知道如何解决这个问题吗？

新语法适用于jpql，而不是sql。不能将其与nativeQuery一起使用。您必须执行以下操作：

@Query(
        "SELECT new fullpackage.UserCount(userTaskNo, count(*)) " +
        "FROM Users " +
        "where status = 'VCS' group by userTaskNo"
)
List<UserCount> getUsers();

---

你可以用投影是的我已经用过了

syntax error at or near "." ...
could not extract ResultSet; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not extract ResultSet

@Query(
        "SELECT new fullpackage.UserCount(userTaskNo, count(*)) " +
        "FROM Users " +
        "where status = 'VCS' group by userTaskNo"
)
List<UserCount> getUsers();