SpringBoot的Mybatis注解版数据库操作

mybatis的依赖：

<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.0</version>
</dependency>

还是不使用tomcat的数据源，选择使用的是druid的数据源

还是引入druid的依赖、以及druid的yml配置、包括druid的config

我们在数据库再创建一个新的数据库，名为mybatis，用schame进行创表sql的执行，然后添加employee和department的变量的set/get的设定;

我们设定一个Mapper进行注解版的设定：（我们可以在每个Mapper上添加@Mapper的注解，也可以在主函数或者是配置函数上加上，这样，就可以随我们文件夹下的所有文件设定成Mapper）

@MapperScan(value  = "com.zch.springboot_mybatis.Mapper"

package com.zch.springboot_mybatis.Mapper;
import com.zch.springboot_mybatis.bean.Department;
import org.apache.ibatis.annotations.*;
//@Mapper
public interface DepaertmentMapper {
// mybatis的注解版
@Select("select * from department where id=#{id}")
public Department getDdeptByid(Integer id);
@Delete("delete from department where id=#{id}")
public int deleteDeptByid(Integer id);
@Options(useGeneratedKeys = true ,keyProperty = "id")
@Insert("insert into department(departmentName) values(#{departmentName})")
public int insertDept(Department department);
@Update("update department set departmentName=#department where id={#id}")
public int updateDept(Department depaertment);
}

所有的sql都是写在@下

然后在controller进行请求的解析：

package com.zch.springboot_mybatis.Controller;
 
import com.zch.springboot_mybatis.Mapper.DepaertmentMapper;
import com.zch.springboot_mybatis.bean.Department;
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 DeptController {
@Autowired
DepaertmentMapper depaertmentMapper;
private Department deleteDepartment;
Department department=new Department();
 
//select实现
@GetMapping("/dept/{id}")
public Department getDepartment(@PathVariable("id") Integer id){
return depaertmentMapper.getDdeptByid(id);
}
//delete实现
@GetMapping("/dept/delete/{id}")
public Department deleteDepartment(@PathVariable("id") Integer id){
depaertmentMapper.deleteDeptByid(id);
return deleteDepartment;
}
//insert实现
@GetMapping("/dept")
public Department insertDept(Department department){
depaertmentMapper.insertDept(department);
return department;
}
//update实现（失败）
@GetMapping("/dept/update")
public Department updateDepartment(@PathVariable("id") Department id ,@PathVariable("departmentName" )Department departmentname){
depaertmentMapper.updateDept(department);
return deleteDepartment;
}
}

然后我们在进行数据的插入和访问的时候，我们就可以得到我们想要的东西