使用mybaits实现数据的更新和删除

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<?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>

    <update id="updateUser" parameterType="com.course.model.User">
        update user set name=#{name},age=#{age},sex=#{sex}
        where id =#{id}
    </update>

    <delete id="deleteUser" parameterType="Integer">
        delete from user where id = #{id}
    </delete>
</mapper>

@Log4j
@RestController
@Api(value = "v1",description = "这是我的第一个版本的demo")
@RequestMapping("/v1/")
public class Demo {
    /**
     * 首先获取一个执行sql语句的对象
     * @Autowired这个注解的含义是启动及加载，
     * 启动这个Demo类，
     * 这个对象就被加载了
     */
    @Autowired
    private SqlSessionTemplate template;

    @RequestMapping(value = "/getUserCount",method = RequestMethod.GET)
    @ApiOperation(value = "可以获取到用户数",httpMethod = "GET")
    public int getUserCount(){
        return template.selectOne("getUserCount");
    }
    @RequestMapping(value = "/addUser",method = RequestMethod.POST)
    @ApiOperation(value = "新增用户",httpMethod = "POST")
    public int addUser(@RequestBody User user){
        return template.insert("addUser",user);
    }
    @RequestMapping(value = "/updateUser",method = RequestMethod.POST)
    @ApiOperation(value = "更新用户",httpMethod = "POST")
    public int updateUser(@RequestBody User user){
      return  template.update("updateUser",user);
    }
    @RequestMapping(value = "deleteUser",method = RequestMethod.POST)
    @ApiOperation(value = "删除用户",httpMethod = "POST")
    public int delUser(@RequestParam int id){
    return template.delete("deleteUser",id);
    }
}