SSM 实现单表 CRUD

文章目录

SSM 实现单表 CRUD
一、数据库
二、后端
- 1.依赖项
- 2.项目结构
- 3.Student.java 实体类
- 4.StudentDao 接口
- 5.StudentMapper.xml
- 6.StudentService 接口
- 7.StudentServiceImpl.java
- 8.StudentController.java
- 9.application.yml
- 10.StudentSsmApplication.java

一、数据库

数据库名 student
表名 student

字段

二、后端

1.依赖项

2.项目结构

3.Student.java 实体类

package com.sisyphus.studentssm.pojo;/*** @Description: $* @Param: $* @return: $* @Author: Sisyphus* @Date: $*/
public class Student {private Integer id;private String name;private String email;private Integer age;@Overridepublic String toString() {return "Student{" +"id=" + id +", name='" + name + '\'' +", email='" + email + '\'' +", age=" + age +'}';}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 getEmail() {return email;}public void setEmail(String email) {this.email = email;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}
}

4.StudentDao 接口

package com.sisyphus.studentssm.dao;import com.sisyphus.studentssm.pojo.Student;public interface StudentDao {Student queryById(Integer id);void insert(Integer id, String name, String email, Integer age);void deleteById(Integer id);void update(Student student);
}

5.StudentMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="com.sisyphus.studentssm.dao.StudentDao"><select id="queryById" resultType="com.sisyphus.studentssm.pojo.Student">select id,name,email,age from student where id = #{id}</select><insert id="insert">insert into student values (#{id},#{name},#{email},#{age})</insert><delete id="deleteById">delete from student where id = #{id}</delete><update id="update">update student set name=#{name},email=#{email},age=#{age} where id = #{id}</update>
</mapper>

6.StudentService 接口

package com.sisyphus.studentssm.service;import com.sisyphus.studentssm.pojo.Student;public interface StudentService {Student queryById(Integer id);void insert(Integer id, String name, String email, Integer age);void deleteById(Integer id);void update(Student student);
}

7.StudentServiceImpl.java

package com.sisyphus.studentssm.service;import com.sisyphus.studentssm.dao.StudentDao;
import com.sisyphus.studentssm.pojo.Student;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;/*** @Description: $* @Param: $* @return: $* @Author: Sisyphus* @Date: $*/
@Service
public class StudentServiceImpl implements StudentService{@Autowiredprivate StudentDao studentDao;@Overridepublic Student queryById(Integer id) {return studentDao.queryById(id);}@Overridepublic void insert(Integer id, String name, String email, Integer age) {studentDao.insert(id,name,email,age);}@Overridepublic void deleteById(Integer id) {studentDao.deleteById(id);}@Overridepublic void update(Student student) {studentDao.update(student);}
}

8.StudentController.java

package com.sisyphus.studentssm.controller;import com.sisyphus.studentssm.pojo.Student;
import com.sisyphus.studentssm.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;/*** @Description: $* @Param: $* @return: $* @Author: Sisyphus* @Date: $*/
@RestController
@RequestMapping("student")
public class StudentController {@Autowiredprivate StudentService studentService;@RequestMapping("query")public Student queryById(@RequestParam("id") Integer id){return studentService.queryById(id);}@RequestMapping("insert")public void insert(@RequestParam("id") Integer id, @RequestParam("name") String name, @RequestParam("email") String email, @RequestParam("age") Integer age){studentService.insert(id,name,email,age);}@RequestMapping("delete")public void deleteById(@RequestParam("id") Integer id){studentService.deleteById(id);}@RequestMapping("update")public void update(@RequestParam("student") Student student){studentService.update(student);}
}

9.application.yml

spring:datasource:driver-class-name: com.mysql.cj.jdbc.Driverurl: jdbc:mysql://localhost:3306/student?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTCusername: rootpassword: rootmybatis:mapper-locations: classpath:mapper/*.xml

10.StudentSsmApplication.java

package com.sisyphus.studentssm;import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplication
@MapperScan("com.sisyphus.studentssm.dao")
public class StudentSsmApplication {public static void main(String[] args) {SpringApplication.run(StudentSsmApplication.class, args);}}

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【小项目】SSM 实现单表 CRUD

SSM 实现单表 CRUD

文章目录

一、数据库

二、后端

1.依赖项

2.项目结构

3.Student.java 实体类

4.StudentDao 接口

5.StudentMapper.xml

6.StudentService 接口

7.StudentServiceImpl.java

8.StudentController.java

9.application.yml

10.StudentSsmApplication.java

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