java.lang.ClassCastException: com.javainuse.model.DAOUser 不能转换为 com.javainuse.dao.UserDao

Question

When I run the application its not give an error but when hit the url on postman it showing error.

package com.javainuse.dao;


import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;

import com.javainuse.model.DAOUser;

@Repository
public interface UserDao extends CrudRepository<DAOUser, Integer> {
        UserDao findByUsername(String username);
}

Answer 1

The return type should be your entity not your repository interface

I think your entity is DAOUser

@Repository
public interface UserDao extends CrudRepository<DAOUser, Integer> {
    DAOUser findByUsername(String username);
}