Kite学习框架的第十九天

1 使用注解整合MyBatis

1.1 首先创建一个要进行操作的数据库

SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for department
-- ----------------------------
DROP TABLE IF EXISTS `department`;
CREATE TABLE `department` (
`id` INT(11) NOT NULL AUTO_INCREMENT,
`departmentName` VARCHAR(255) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=INNODB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;

SET FOREIGN_KEY_CHECKS=0;

1.2 创建一个数据库对应的实体类

package cn.kitey.mybatis.bean;

public class Department {

private Integer id;
private String  departmentName;

public Department() {
}

public Department(Integer id, String departmentName) {
this.id = id;
this.departmentName = departmentName;
}

public Integer getId() {
return id;
}

public void setId(Integer id) {
this.id = id;
}

public String getDepartmentName() {
return departmentName;
}

public void setDepartmentName(String departmentName) {
this.departmentName = departmentName;
}

@Override
public String toString() {
return "Department{" +
"id=" + id +
", departmentName='" + departmentName + '\'' +
'}';
}
}

1.3 创建一个Mapper包，并创建一个DepartmentMapper接口，并指定为mapper

在类上添加一个
@Mapper
指定扫面这一个类

package cn.kitey.mybatis.mapper;

import cn.kitey.mybatis.bean.Department;
import org.apache.ibatis.annotations.*;

/**
* 指定这是一个操作的据库的mapper
*/
//@Mapper
public interface DepartmentMapper {

@Select("select * from department where id=#{id}")
public Department getDeptById(Integer id);

@Select("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=#{departmentName} where id={id }")
public int updateDept(Department department);
}

在主程序上加一个
@MapperScan(value = “cn.kitey.mybatis.mapper”)
表示扫描整个mapper包下

package cn.kitey.mybatis;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@MapperScan(value = "cn.kitey.mybatis.mapper")
@SpringBootApplication
public class Demo06BootDataMybatisApplication {

public static void main(String[] args) {
SpringApplication.run(Demo06BootDataMybatisApplication.class, args);
}

}

1.4 创建一个控制类

通过自动注入的方法注入
@Autowired
DepartmentMapper departmentMapper;

package cn.kitey.mybatis.controller;

import cn.kitey.mybatis.bean.Department;
import cn.kitey.mybatis.bean.Employee;
import cn.kitey.mybatis.mapper.DepartmentMapper;
import cn.kitey.mybatis.mapper.EmployeeMapper;
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
DepartmentMapper departmentMapper;

@GetMapping("/dept/{id}")
public Department getDepartment(@PathVariable("id") Integer id){
return  departmentMapper.getDeptById(id);
}

@GetMapping("/dept")
public Department insertDept(Department department){
departmentMapper.insertDept(department);
return  department;
}

1.5 在网页地址栏进行访问

这个是进行数据的插入

还测试了一个进行数据查询

我们再看一下我数据库的内容

也只有之两条数据

以上就是基于注解的SpringBoot整合Mybatis