<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.course">
    <select id="getUserCount" parameterType="com.course.model.User" resultType="Integer">
        select count(*) from user;
    </select>
    <insert id="addUser" parameterType="com.course.model.User">
        insert into user(id,name,age,sex)
        values(#{id},#{name},#{age},#{sex})
    </insert>

</mapper>
 

import lombok.Data;
/**裡面的屬性跟資料庫裡的欄位要對應*/
@Data
public class User {
    private int id;
    private String name;
    private int age;
    private String sex;


}

@Log4j
@RestController
@Api(value = "v1",description = "這是我的第一個版本的demo")
@RequestMapping("/v1/")
public class Demo {
    /**
     * 首先獲取一個執行sql語句的物件
     * @Autowired這個註解的含義是啟動及載入，
     * 啟動這個Demo類，
     * 這個物件就被載入了
     */
    @Autowired
    private SqlSessionTemplate template;

    @RequestMapping(value = "/getUserCount",method = RequestMethod.GET)
    @ApiOperation(value = "可以獲取到使用者數",httpMethod = "GET")
    public int getUserCount(){
        return template.selectOne("getUserCount");
    }
    @RequestMapping(value = "/addUser",method = RequestMethod.POST)
    @ApiOperation(value = "新增使用者數",httpMethod = "POST")
    public int addUser(@RequestBody User user){
        return template.insert("addUser",user);

    }

}