【Spring Boot】Spring Boot结合MyBatis简单实现学生信息管理模块

实战：实现学生信息管理模块

1. 环境准备

• JDK
• Spring Boot
• MyBatis

2. 创建Spring Boot项目
   使用Spring Initializr创建一个新的Spring Boot项目，并添加以下依赖：

• Spring Web
• MyBatis Framework
• MySQL Driver

3. 数据库设计
   在MySQL数据库中创建一个名为studentdb的数据库，并创建一个名为students的表，表结构如下：

CREATE TABLE `students` (
  `id` int NOT NULL AUTO_INCREMENT,
  `name` varchar(255) NOT NULL,
  `email` varchar(255) NOT NULL,
  `address` varchar(255) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

4. 配置数据源和MyBatis
   在application.properties文件中添加以下配置：

# 数据源配置
spring.datasource.url=jdbc:mysql://localhost:3306/studentdb?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT%2B8
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
# MyBatis配置
mybatis.type-aliases-package=com.example.demo.entity
mybatis.mapper-locations=classpath:mapper/*.xml

5. 定义实体类
   创建一个名为Student的实体类，代码如下：

public class Student {
    
    
    private int id;
    private String name;
    private String email;
    private String address;

    // getter和setter方法省略
}

6. 定义Mapper接口
   创建一个名为StudentMapper的Mapper接口，代码如下：

@Mapper
public interface StudentMapper {
    
    
    List<Student> getAllStudents();

    Student getStudentById(int id);

    int addStudent(Student student);

    int updateStudent(Student student);

    int deleteStudent(int id);
}

7. 定义Mapper XML配置文件
   在resources/mapper下创建一个名为StudentMapper.xml的配置文件，代码如下：

<mapper namespace="com.example.demo.mapper.StudentMapper">
    <resultMap id="StudentMap" type="com.example.demo.entity.Student">
        <id property="id" column="id" />
        <result property="name" column="name" />
        <result property="email" column="email" />
        <result property="address" column="address" />
    </resultMap>

    <select id="getAllStudents" resultMap="StudentMap">
        SELECT * FROM students
    </select>

    <select id="getStudentById" resultMap="StudentMap">
        SELECT * FROM students WHERE id=#{id}
    </select>

    <insert id="addStudent" parameterType="com.example.demo.entity.Student">
        INSERT INTO students(name, email, address) VALUES(#{name}, #{email}, #{address})
    </insert>

    <update id="updateStudent" parameterType="com.example.demo.entity.Student">
        UPDATE students SET name=#{name}, email=#{email}, address=#{address} WHERE id=#{id}
    </update>

    <delete id="deleteStudent">
        DELETE FROM students WHERE id=#{id}
    </delete>
</mapper>

8. 实现Controller
   创建一个名为StudentController的Controller，代码如下：

@RestController
@RequestMapping("/api")
public class StudentController {
    
    
    @Autowired
    private StudentMapper studentMapper;

    @GetMapping("/students")
    public List<Student> getAllStudents() {
    
    
        return studentMapper.getAllStudents();
    }

    @GetMapping("/students/{id}")
    public Student getStudentById(@PathVariable int id) {
    
    
        return studentMapper.getStudentById(id);
    }

    @PostMapping("/students")
    public int addStudent(@RequestBody Student student) {
    
    
        return studentMapper.addStudent(student);
    }

    @PutMapping("/students")
    public int updateStudent(@RequestBody Student student) {
    
    
        return studentMapper.updateStudent(student);
    }

    @DeleteMapping("/students/{id}")
    public int deleteStudent(@PathVariable int id) {
    
    
        return studentMapper.deleteStudent(id);
    }
}

9. 测试API
   使用Postman或其他工具测试API，例如：

• GET http://localhost:8080/api/students
• GET http://localhost:8080/api/students/1
• POST http://localhost:8080/api/students
  请求体：

  {
      "name": "张三",
      "email": "[email protected]",
      "address": "北京市海淀区"
  }
  

• PUT http://localhost:8080/api/students
  请求体：

  {
      "id": 1,
      "name": "张三",
      "email": "[email protected]",
      "address": "北京市海淀区"
  }
  

• DELETE http://localhost:8080/api/students/1

完成以上步骤后，就可以使用Spring Boot和MyBatis实现一个简单的学生信息管理模块了。