SpringBoot开发，如何使用MyBatis全面代替JPA？

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <scope>runtime</scope>
</dependency>
<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.2.0</version>
</dependency>

spring.datasource.url=jdbc:mysql://localhost:3306/boot
spring.datasource.username=root
spring.datasource.password=root

# spring.jpa.hibernate.ddl-auto=update
# spring.jpa.show-sql=true
# spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL57Dialect
# spring.jpa.properties.hibernate.format_sql=true
# logging.level.org.hibernate.SQL=DEBUG
# logging.level.org.hibernate.type.descriptor.sql.BasicBinder=TRACE

mybatis.mapper-locations=classpath*:mappers/*.xml
logging.level.com.example.demo.mapper=DEBUG
logging.level.org.mybatis=DEBUG
logging.level.jdbc.sqlonly=DEBUG

package com.example.demo.entity;
import org.apache.ibatis.type.Alias;

@Alias("User")
public class User {
    private Integer id; // Ensure the ID field is Integer
    private String name;
    private String password;

    // Getters and Setters
    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}

package com.example.demo.mapper;

import com.example.demo.model.User;
import org.apache.ibatis.annotations.*;

import java.util.List;

@Mapper
public interface UserMapper {
    @Select("SELECT * FROM user")
    List<User> findAll();

    @Select("SELECT * FROM user WHERE id = #{id}")
    User findById(Long id);

    @Select("SELECT * FROM user WHERE name = #{name}")
    User findByName(String name);

    @Insert("INSERT INTO user(name, password) VALUES(#{name}, #{password})")
    @Options(useGeneratedKeys = true, keyProperty = "id")
    void insert(User user);

    @Update("UPDATE user SET name = #{name}, password = #{password} WHERE id = #{id}")
    void update(User user);

    @Delete("DELETE FROM user WHERE id = #{id}")
    void deleteById(Long id);

    @Select("SELECT COUNT(*) FROM user")
    int count();
}

//...
import com.example.demo.mapper.UserMapper;
//...

@Service
public class UserService {
    @Autowired
    private UserMapper userMapper;
    //...
    public List<User> getAllUsers() {
        return userMapper.findAll();
    }

    public User getUserById(Long id) {
        if (id == null) {
            throw new IllegalArgumentException("ID不能为空");
        }
        return userMapper.findById(id);
    }
    //...
}

//...
import com.example.demo.mapper.UserMapper;
//...
@Controller
public class LoginController {
    @Autowired
    private UserMapper userMapper;
    //...
    private boolean isValidUser(String username, String password) {
        User user = userMapper.findByName(username);
        if (user != null && user.getPassword().equals(password)) {
            return true;
        }
        return false;
    }
}