在springbootdata数据库中创建表user，包括字段id name pass，并输入数据。用Mybatis按i d查询，将查询结果输出到控制台

在Spring Boot Data JPA中，首先需要设置数据库连接配置并添加JPA和MyBatis的支持。假设我们已经在pom.xml文件中配置了相关依赖。以下是创建User实体类（User.java）、配置数据库表(user)以及插入数据的步骤：

1. **创建User实体类**（User.java）:

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Entity
public class User {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;
    private String password;

    // getter和setter方法
    public Long getId() {
        return id;
    }

    public void setId(Long 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;
    }
}

2. **配置实体扫描和数据源** (application.properties):

spring.datasource.url=jdbc:mysql://localhost:3306/your_database_name
spring.datasource.username=your_username
spring.datasource.password=your_password
spring.jpa.hibernate.ddl-auto=update
mybatis.mapper-locations=classpath:mapper/*.xml

3. **创建MyBatis映射文件** (mapper/UserMapper.xml):

<?xml version="1.0" encoding="UTF-8"?>
<mapper namespace="com.example.demo.mapper.UserMapper">
    <select id="findById" resultType="com.example.demo.entity.User">
        SELECT * FROM user WHERE id = #{id}
    </select>
</mapper>

4. **编写Service层** (UserService.java):

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.example.demo.mapper.UserMapper;

@Service
public class UserService {

    @Autowired
    private UserMapper userMapper;

    public User getUserById(Long id) {
        return userMapper.findById(id);
    }
}

5. **在Controller中调用并打印结果** (UserController.java):

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class UserController {

    @Autowired
    private UserService userService;

    @GetMapping("/users/{id}")
    public User getUser(@PathVariable("id") Long id) {
        User user = userService.getUserById(id);
        System.out.println("User details: " + user);
        return user;
    }
}

现在你可以通过HTTP请求`http://localhost:8080/users/{id}`来获取指定ID的用户信息，其中{id}会被实际的用户ID替换。