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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>
</mapper>
import lombok.Data;
/**里面的属性跟数据库里的字段要对应*/
@Data
public class User {
private int id;
private String name;
private int age;
private String sex;
}
@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 = "新增用户数",httpMethod = "POST")
public int addUser(@RequestBody User user){
return template.insert("addUser",user);
}
}