<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.6.RELEASE</version>
        <relativePath/>
    </parent>

 <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

package com.zhu.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/test")
public class HelloController {

    @RequestMapping("/hello")
    public String hello(){
        return "hello";
    }
}

package com.zhu;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class MybatisplusDemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(MybatisplusDemoApplication.class, args);
    }
}

<!--mybatisplus-->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.2.0</version>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>
<!--數(shù)據(jù)庫連接-->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <scope>runtime</scope>
</dependency>

# DataSource Config
spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/此處為你的數(shù)據(jù)庫名?useUnicode=true&useSSL=false&characterEncoding=utf8&serverTimezone=Asia/Shanghai
    username: 你的數(shù)據(jù)庫用戶名
    password: 你的數(shù)據(jù)庫密碼
mybatis-plus:
  # xml文件掃描
  mapper-locations: classpath*:/mapper/**Mapper.xml

package com.zhu.config;

import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;

@Configuration
@MapperScan("com.zhu.mapper")//mapper接口掃描注解
@EnableTransactionManagement
public class MyBatisPlusConfig {//分頁配置,本博客不展示分頁操作

    @Bean
    public PaginationInterceptor paginationInterceptor() {
        PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
        return paginationInterceptor;
    }
}

package com.zhu.entity;

import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import java.io.Serializable;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.experimental.Accessors;

/**
 * <p>
 * 
 * </p>
 *
 * @author xiaozhu
 * @since 2022-04-13
 */
//使用lombok，簡化了代碼，不用書寫set get等方法
@Data
@EqualsAndHashCode(callSuper = false)
@Accessors(chain = true)
public class Student implements Serializable {

    private static final long serialVersionUID = 1L;

    /**
     * 自動(dòng)遞增
     */
    @TableId(value = "sno", type = IdType.AUTO)
    private Integer sno;

    private String sname;

    private String sex;

    private Integer age;

    private Integer clas;
}

package com.zhu.mapper;

import com.zhu.entity.Student;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;

/**
 * <p>
 *  Mapper 接口
 * </p>
 *
 * @author xiaozhu
 * @since 2022-04-13
 */
public interface StudentMapper extends BaseMapper<Student> {

}

package com.zhu.service;

import com.zhu.entity.Student;
import com.baomidou.mybatisplus.extension.service.IService;

/**
 * <p>
 *  服務(wù)類
 * </p>
 *
 * @author xiaozhu
 * @since 2022-04-13
 */
public interface StudentService extends IService<Student> {

}

package com.zhu.service.impl;

import com.zhu.entity.Student;
import com.zhu.mapper.StudentMapper;
import com.zhu.service.StudentService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.stereotype.Service;

/**
 * <p>
 *  服務(wù)實(shí)現(xiàn)類
 * </p>
 *
 * @author xiaozhu
 * @since 2022-04-13
 */
@Service
public class StudentServiceImpl extends ServiceImpl<StudentMapper, Student> implements StudentService {

}

package com.zhu.controller;


import com.zhu.entity.Student;
import com.zhu.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

/**
 * <p>
 *  前端控制器
 * </p>
 *
 * @author xiaozhu
 * @since 2022-04-13
 */
@RestController
@RequestMapping("/student")
public class StudentController {
    
    @Autowired
    private StudentService studentService;

    //返回所有學(xué)生
    @GetMapping("/allStudent")
    public List<Student> findAllStudent(){

        return studentService.list();
    }

    //根據(jù)學(xué)號(hào)查詢學(xué)生
    @GetMapping("/findBySno/{sno}")
    public Student findBySno(@PathVariable("sno") Integer sno){

        return studentService.getById(sno);
    }

    //根據(jù)學(xué)號(hào)刪除學(xué)生信息（此方法可以使用軟件postman進(jìn)行測試）
    @DeleteMapping("/deleteBySno/{sno}")
    public boolean deleteBySno(@PathVariable("sno") Integer sno){
        return  studentService.removeById(sno);
    }

    //增加一個(gè)學(xué)生信息（此方法可以使用軟件postman進(jìn)行測試）,注意學(xué)號(hào)自增
    @PostMapping("/add")
    public boolean add(@RequestBody Student student){
        return studentService.save(student);
    }

    //根據(jù)學(xué)號(hào)修改學(xué)生信息（此方法可以使用軟件postman進(jìn)行測試），注意學(xué)號(hào)自增
    @PutMapping("/update")
    public boolean update(@RequestBody Student student){
        return studentService.updateById(student);
    }
}