mybatis xml 写法解析

.idea/compiler.xml

@@ -11,6 +11,7 @@
     </annotationProcessing>
     <bytecodeTargetLevel>
       <module name="miaosha" target="1.6" />
+      <module name="springcloud-server" target="1.8" />
     </bytecodeTargetLevel>
   </component>
 </project>

.idea/encodings.xml

@@ -2,5 +2,6 @@
 <project version="4">
   <component name="Encoding">
     <file url="file://$PROJECT_DIR$" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/springcloud-server" charset="UTF-8" />
   </component>
 </project>

README.md

@@ -122,3 +122,7 @@ redis的数量不是库存,他的作用仅仅只是为了阻挡多余的请求
  注意：局部变量是同步或局部线程的一个好的替代，它总是能够保证线程安全。唯一可能限制你这样做的是你的应用设计约束<br>
  
  所以设计threadlocal存储user不会对对象产生影响，每次进来一个请求都会产生自身的线程变量来存储
+ 
+ ### <font color=#0099ff size=3 >15.mybatis如何使用注解与xml配置？</font><br>
+本文使用的是注解方法开发所以不做过多解释<br>
+下面仔细讲解以下如何详细使用xml开发<br>

pom.xml

@@ -96,7 +96,6 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-amqp</artifactId>
         </dependency>
-
     </dependencies>
 
     <build>
@@ -107,5 +106,14 @@
                 <artifactId>spring-boot-maven-plugin</artifactId>
             </plugin>
         </plugins>
+        <resources>
+            <resource>
+                <directory>src/main/java</directory>
+                <includes>
+                    <include>**/*.xml</include>
+                </includes>
+            </resource>
+        </resources>
     </build>
+
 </project>

src/main/java/com/geekq/miaosha/Test.java

@@ -1,15 +1,30 @@
 package com.geekq.miaosha;
 
+import com.geekq.miaosha.domain.MiaoshaUser;
+import org.apache.ibatis.io.Resources;
+import org.apache.ibatis.session.SqlSession;
+import org.apache.ibatis.session.SqlSessionFactory;
+import org.apache.ibatis.session.SqlSessionFactoryBuilder;
+
+import java.io.IOException;
+import java.io.Reader;
+
+/**
+ * mybatis xml 写法的配置测试类
+ */
 public class Test {
-    public static void main(String[] args) {
-        DemoTask demoTask = new DemoTask();
-        DemoTask demoTask1 = new DemoTask();
-        DemoTask demoTask2 = new DemoTask();
-        Thread t = new Thread(demoTask);
-            t.start();
-        new Thread(demoTask).start();
-        new Thread(demoTask2).start();
+    public static void main(String[] args) throws IOException {
+
+        //读取配置文件
+        Reader reader = Resources.getResourceAsReader("config.xml");
+        SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(reader);
 
 
+        SqlSession session  = sessionFactory.openSession();
+
+        String statement = "com.geekq.miaosha.dao.UserMapper.getMiaoShaUserById" ;
+        MiaoshaUser user = session.selectOne(statement,"18612766134");
+
+        System.out.println(user.toString());
     }
 }

src/main/java/com/geekq/miaosha/common/ResponseCode.java

@@ -0,0 +1,27 @@
+package com.geekq.miaosha.common;
+
+/**
+ * 响应类
+ */
+public enum ResponseCode {
+    SUCCESS(0, "SUCCESS"),
+    ERROR(1, "ERROR"),
+    NEED_LOGIN(10, "NEED_LOGIN"),
+    ILLEGAL_ARGUMENT(2, "ILLEGAL_ARGUMENT");
+
+    private final int code;
+    private final String desc;
+
+    private ResponseCode(int code, String desc) {
+        this.code = code;
+        this.desc = desc;
+    }
+
+    public int getCode() {
+        return code;
+    }
+
+    public String getDesc() {
+        return desc;
+    }
+}

src/main/java/com/geekq/miaosha/common/ServerResponse.java

@@ -0,0 +1,78 @@
+package com.geekq.miaosha.common;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+
+import java.io.Serializable;
+
+@JsonSerialize(include = JsonSerialize.Inclusion.NON_NULL)
+//保证序列化的时候 不会有空
+public class ServerResponse<T> implements Serializable  {
+
+    private int status ;
+    private String msg ;
+    private T data ;
+    private ServerResponse( int status ){
+        this.status =status;
+    }
+    private ServerResponse( int status ,T data){
+        this.status =status;
+        this.data = data;
+    }
+    private ServerResponse( int status ,String msg ,T data){
+        this.status =status;
+        this.msg = msg ;
+        this.data = data;
+    }
+
+    private ServerResponse( int status ,String msg ){
+        this.status =status;
+        this.msg = msg ;
+    }
+
+    @JsonIgnore
+    public boolean isSuccess(){
+        return this.status == ResponseCode.SUCCESS.getCode();
+    }
+
+    public int getStatus() {
+        return status;
+    }
+
+    public String getMsg() {
+        return msg;
+    }
+
+    public T getData() {
+        return data;
+    }
+
+    public static <T> ServerResponse<T> createBySuccess(){
+        return new ServerResponse<T>(ResponseCode.SUCCESS.getCode());
+    }
+
+    public static <T> ServerResponse<T> createBySuccessMessage(String msg){
+        return new ServerResponse<T>(ResponseCode.SUCCESS.getCode(),msg);
+    }
+
+    public static <T> ServerResponse<T> createBySuccess(T data){
+        return new ServerResponse<T>(ResponseCode.SUCCESS.getCode(),data);
+    }
+
+    public static <T> ServerResponse<T> createBySuccess(String msg,T data){
+        return new ServerResponse<T>(ResponseCode.SUCCESS.getCode(),msg,data);
+    }
+
+    public static <T> ServerResponse<T> createByError(){
+        return new ServerResponse<T>(ResponseCode.ERROR.getCode(),ResponseCode.ERROR.getDesc());
+    }
+
+    public static <T> ServerResponse<T> createByErrorMessage(String errorMsg){
+        return new ServerResponse<T>(ResponseCode.ERROR.getCode(),errorMsg);
+    }
+    public static <T> ServerResponse<T> createByErrorCodeMessage(int errorCode , String errorMsg){
+        return new ServerResponse<T>(errorCode,errorMsg);
+    }
+
+
+}

src/main/java/com/geekq/miaosha/controller/LoginController.java

@@ -1,14 +1,17 @@
 package com.geekq.miaosha.controller;
 
-import com.geekq.miaosha.result.CodeMsg;
+import com.geekq.miaosha.dao.UserMapper;
+import com.geekq.miaosha.domain.MiaoshaUser;
 import com.geekq.miaosha.result.Result;
 import com.geekq.miaosha.service.MiaoShaUserService;
 import com.geekq.miaosha.vo.LoginVo;
+import org.apache.ibatis.annotations.Mapper;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.ResponseBody;
 
 import javax.servlet.http.HttpServletResponse;
@@ -24,6 +27,9 @@ public class LoginController {
     private MiaoShaUserService userService;
 
 
+    @Autowired
+    private UserMapper userMapper;
+
     @RequestMapping("/to_login")
     public String tologin(LoginVo loginVo) {
         log.info(loginVo.toString());
@@ -38,4 +44,31 @@ public class LoginController {
         return Result.success(true);
     }
 
+
+    @RequestMapping(value = "/register", method = RequestMethod.POST)
+    public Result<String> register(MiaoshaUser user) {
+        return userService.insertMiaoShaUser(user);
+    }
+
+    @RequestMapping("/mybatis")
+    public void mybatisXml() {
+        //
+        int count = userMapper.getMiaoShaUserNum();
+        System.out.println(count);
+        MiaoshaUser user = userMapper.getMiaoShaUserById(Long.valueOf("18612766134"));
+        System.out.println(user);
+//
+//        MiaoshaUser miaoshaUser =new MiaoshaUser();
+//        miaoshaUser.setId(Long.valueOf("1234569879"));
+//        miaoshaUser.setNickname("test");
+//        Long num = userMapper.insertMiaoShaUser(miaoshaUser);
+
+        MiaoshaUser upmiaoshaUser =new MiaoshaUser();
+        upmiaoshaUser.setId(Long.valueOf("1234569879"));
+        upmiaoshaUser.setNickname("test1");
+        userMapper.updateMiaoShaUser(upmiaoshaUser);
+
+        userMapper.deleteMiaoShaUser(Long.valueOf("1234569879"));
+    }
+
 }

src/main/java/com/geekq/miaosha/controller/UserController.java

@@ -0,0 +1,24 @@
+package com.geekq.miaosha.controller;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+
+import javax.servlet.http.HttpSession;
+
+@Controller
+@RequestMapping("/user/")
+public class UserController {
+    /**
+     * 用户登录
+     * @param username
+     * @param password
+     * @param session
+     * @return
+     */
+    @RequestMapping(value = "/login",method = RequestMethod.POST)
+    public Object login(String username , String password , HttpSession session){
+
+        return null;
+    }
+}

src/main/java/com/geekq/miaosha/dao/MiaoShaUserDao.java

@@ -1,10 +1,7 @@
 package com.geekq.miaosha.dao;
 
 import com.geekq.miaosha.domain.MiaoshaUser;
-import org.apache.ibatis.annotations.Mapper;
-import org.apache.ibatis.annotations.Param;
-import org.apache.ibatis.annotations.Select;
-import org.apache.ibatis.annotations.Update;
+import org.apache.ibatis.annotations.*;
 
 @Mapper
 public interface MiaoShaUserDao {
@@ -15,4 +12,9 @@ public interface MiaoShaUserDao {
 
     @Update("update miaosha_user set password = #{password} where id = #{id}")
     public void update(MiaoshaUser toBeUpdate);
+
+
+    @Insert("insert into miaosha_user (id , nickname ,password , salt ,head,register_date,last_login_date)value (#{id},#{nickname},#{password},#{salt},#{nickname},#{head},#{register_date},#{last_login_date}) ")
+    public long insertMiaoShaUser(MiaoshaUser miaoshaUser);
+
 }

src/main/java/com/geekq/miaosha/dao/MiaoshaUserDao.java

@@ -1,13 +0,0 @@
-package com.geekq.miaosha.dao;
-
-import com.geekq.miaosha.domain.MiaoshaUser;
-import org.apache.ibatis.annotations.Mapper;
-import org.apache.ibatis.annotations.Param;
-import org.apache.ibatis.annotations.Select;
-
-@Mapper
-public interface MiaoshaUserDao {
-	
-	@Select("select * from miaosha_user where id = #{id}")
-	public MiaoshaUser getById(@Param("id") long id);
-}

src/main/java/com/geekq/miaosha/dao/UserMapper.java

@@ -0,0 +1,30 @@
+package com.geekq.miaosha.dao;
+
+import com.geekq.miaosha.domain.MiaoshaUser;
+import org.apache.ibatis.annotations.Mapper;
+
+import java.util.List;
+
+/**
+ * mybatis xml  写法
+ */
+@Mapper
+public interface UserMapper {
+    int countbyMenuId();
+    MiaoshaUser getMiaoShaUserById(Long phoneId);
+    //秒杀对象获取 mybatis的#与$的区别
+    List<MiaoshaUser> queryMiaoShaUserOrderByColumn(String column);
+
+
+    //查询总条数
+    public int getMiaoShaUserNum();
+
+    public Long insertMiaoShaUser(MiaoshaUser user);
+
+    //更改表数据
+    void updateMiaoShaUser(MiaoshaUser user) ;
+
+    //删除表数据
+
+    void deleteMiaoShaUser(long id );
+}

src/main/java/com/geekq/miaosha/domain/MiaoshaUser.java

@@ -59,4 +59,18 @@ public class MiaoshaUser {
 	public void setLoginCount(Integer loginCount) {
 		this.loginCount = loginCount;
 	}
+
+	@Override
+	public String toString() {
+		return "MiaoshaUser{" +
+				"id=" + id +
+				", nickname='" + nickname + '\'' +
+				", password='" + password + '\'' +
+				", salt='" + salt + '\'' +
+				", head='" + head + '\'' +
+				", registerDate=" + registerDate +
+				", lastLoginDate=" + lastLoginDate +
+				", loginCount=" + loginCount +
+				'}';
+	}
 }

src/main/java/com/geekq/miaosha/result/CodeMsg.java

@@ -7,6 +7,11 @@ public class CodeMsg {
 	
 	//通用的错误码
 	public static CodeMsg SUCCESS = new CodeMsg(0, "success");
+
+	public static CodeMsg SUCCESS_RESIGETER = new CodeMsg(200,"注册成功！");
+
+	public static CodeMsg RESIGETER_FAIL = new CodeMsg(300,"注册失败！");
+
 	public static CodeMsg SERVER_ERROR = new CodeMsg(500100, "服务端异常");
 	public static CodeMsg BIND_ERROR = new CodeMsg(500101, "参数校验异常：%s");
 	public static CodeMsg REQUEST_ILLEGAL = new CodeMsg(500102, "请求非法");

src/main/java/com/geekq/miaosha/result/Result.java

@@ -8,6 +8,7 @@ public class Result<T> {
 
     /**
      * 成功时候的调用
+     *
      * @param data
      * @param <T>
      * @return
@@ -16,8 +17,23 @@ public class Result<T> {
         return new Result<T>(data);
     }
 
+    /**
+     * 注册时候调用
+     *
+     * @param msg
+     * @param data
+     * @param <T>
+     * @return
+     */
+    public static <T> Result<T> success(CodeMsg msg) {
+
+        return new Result<T>(CodeMsg.SUCCESS_RESIGETER);
+
+    }
+
     /**
      * 失败的时候调用
+     *
      * @param cm
      * @param <T>
      * @return
@@ -26,6 +42,11 @@ public class Result<T> {
         return new Result<T>(cm);
     }
 
+//    public Result(CodeMsg msg, T data) {
+//        this.code = msg.getCode();
+//        this.msg = msg.getMsg();
+//        this.data = data;
+//    }
 
     private Result(CodeMsg cm) {
         if (cm == null) {

src/main/java/com/geekq/miaosha/service/IUserService.java

@@ -0,0 +1,7 @@
+package com.geekq.miaosha.service;
+
+public interface IUserService {
+
+    Object login(String username , String password) ;
+
+}

src/main/java/com/geekq/miaosha/service/MiaoShaUserService.java

@@ -7,8 +7,10 @@ import com.geekq.miaosha.exception.GlobleException;
 import com.geekq.miaosha.redis.MiaoShaUserKey;
 import com.geekq.miaosha.redis.RedisService;
 import com.geekq.miaosha.result.CodeMsg;
+import com.geekq.miaosha.result.Result;
 import com.geekq.miaosha.utils.UUIDUtil;
 import com.geekq.miaosha.vo.LoginVo;
+import com.sun.org.apache.bcel.internal.classfile.Code;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
@@ -74,6 +76,17 @@ public class MiaoShaUserService {
         return true;
     }
 
+    public Result<String> insertMiaoShaUser(MiaoshaUser miaoshaUser){
+
+        long resultRegister  = miaoShaUserDao.insertMiaoShaUser(miaoshaUser);
+
+        if(resultRegister == 0){
+            throw new GlobleException(CodeMsg.RESIGETER_FAIL);
+        }
+
+        return Result.success(CodeMsg.SUCCESS_RESIGETER);
+    }
+
     public boolean login(HttpServletResponse response , LoginVo loginVo) {
         if(loginVo ==null){
             throw  new GlobleException(CodeMsg.SERVER_ERROR);

src/main/resources/application.properties

@@ -8,10 +8,13 @@ spring.thymeleaf.encoding=UTF-8
 spring.thymeleaf.mode=HTML5
 
 #mybatis
-mybatis.type-aliases-package=com.imooc.miaosha.domain
+mybatis.type-aliases-package=com.geekq.miaosha.domain
 #开启驼峰转换
 mybatis.configuration.map-underscore-to-camel-case=true
-mybatis.mapperLocations = classpath:com/imooc/miaosha/dao/*.xml
+#mybatis.mapperLocations = classpath:com/geekq/miaosha/dao/*.xml
+mybatis.mapperLocations=classpath:mybatis/mapper/*.xml
+#add mybatis
+mybatis.config-locations=classpath:mybatis/config.xml
 #datasource
 spring.datasource.url=jdbc:mysql://localhost:3306/miaosha?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false
 spring.datasource.username=root

src/main/resources/mybatis/config.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
+<configuration>
+
+<typeAliases>
+    <typeAlias alias="miaoshauser1" type="com.geekq.miaosha.domain.MiaoshaUser"/>
+</typeAliases>
+  <!--  <mappers>
+        <mapper resource="/mybatis/mapper/UserMapper.xml"></mapper>
+    </mappers>-->
+</configuration>

src/main/resources/mybatis/mapper/UserMapper.xml

@@ -0,0 +1,62 @@
+<?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.geekq.miaosha.dao.UserMapper">
+
+    <!--结果集映射-->
+    <resultMap id="BaseResultMap" type="com.geekq.miaosha.domain.MiaoshaUser">
+        <id column="id" property="id" jdbcType="BIGINT"/>
+        <result column="nickname" property="nickname" jdbcType="VARCHAR"/>
+        <result column="salt" property="salt" jdbcType="VARCHAR"/>
+        <result column="head" property="head" jdbcType="VARCHAR"/>
+        <result column="register_date" property="registerDate" jdbcType="TIMESTAMP"/>
+        <result column="last_login_date" property="lastLoginDate" jdbcType="TIMESTAMP"/>
+        <result column="login_Count" property="loginCount" jdbcType="INTEGER"/>
+    </resultMap>
+
+    <!--增加一条数据-->
+
+    <insert id="insertMiaoShaUser" parameterType="com.geekq.miaosha.domain.MiaoshaUser"  keyProperty="id">
+
+        insert into miaosha_user (id, nickname, salt, register_date,last_login_date,login_Count ) values
+        (#{id,jdbcType=BIGINT},#{nickname,jdbcType=VARCHAR},
+        #{salt,jdbcType=VARCHAR},#{registerDate,jdbcType=DATE},#{lastLoginDate,jdbcType=DATE},
+        #{loginCount,jdbcType=INTEGER}
+        )
+    </insert>
+    
+    <!--更新一条数据-->
+    
+    <update id="updateMiaoShaUser" >
+        update miaosha_user set nickname = #{nickname},
+        login_Count = #{loginCount}
+        where id=#{id}
+    </update>
+
+    <!--删除一条数据-->
+    <delete id="deleteMiaoShaUser" parameterType="Long">
+    delete from miaosha_user
+    where id = #{id,jdbcType=BIGINT}
+    </delete>
+
+
+    <sql id="Base_Column_List"> id, nickname, salt, register_date,last_login_date,login_Count </sql>
+
+    <select id="getMiaoShaUserById" parameterType="LONG"  resultType="miaoshauser">
+        SELECT
+        <include refid="Base_Column_List"/>
+        FROM miaosha_user WHERE id = #{id}
+    </select>
+
+
+    <select id="getMiaoShaUserNum" resultType="int">
+      select count(*) from miaosha_user
+    </select>
+
+
+    <select id="countbyMenuId" parameterType="java.lang.Integer"
+            resultType="java.lang.Integer"> select count(*) from miaosha_user
+    </select>
+
+
+</mapper>

target/classes/application.properties

@@ -8,10 +8,13 @@ spring.thymeleaf.encoding=UTF-8
 spring.thymeleaf.mode=HTML5
 
 #mybatis
-mybatis.type-aliases-package=com.imooc.miaosha.domain
+mybatis.type-aliases-package=com.geekq.miaosha.domain
 #开启驼峰转换
 mybatis.configuration.map-underscore-to-camel-case=true
-mybatis.mapperLocations = classpath:com/imooc/miaosha/dao/*.xml
+#mybatis.mapperLocations = classpath:com/geekq/miaosha/dao/*.xml
+mybatis.mapperLocations=classpath:mybatis/mapper/*.xml
+#add mybatis
+mybatis.config-locations=classpath:mybatis/config.xml
 #datasource
 spring.datasource.url=jdbc:mysql://localhost:3306/miaosha?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false
 spring.datasource.username=root

target/classes/mybatis/config.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
+<configuration>
+
+<typeAliases>
+    <typeAlias alias="miaoshauser1" type="com.geekq.miaosha.domain.MiaoshaUser"/>
+</typeAliases>
+  <!--  <mappers>
+        <mapper resource="/mybatis/mapper/UserMapper.xml"></mapper>
+    </mappers>-->
+</configuration>

target/classes/mybatis/mapper/UserMapper.xml

@@ -0,0 +1,62 @@
+<?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.geekq.miaosha.dao.UserMapper">
+
+    <!--结果集映射-->
+    <resultMap id="BaseResultMap" type="com.geekq.miaosha.domain.MiaoshaUser">
+        <id column="id" property="id" jdbcType="BIGINT"/>
+        <result column="nickname" property="nickname" jdbcType="VARCHAR"/>
+        <result column="salt" property="salt" jdbcType="VARCHAR"/>
+        <result column="head" property="head" jdbcType="VARCHAR"/>
+        <result column="register_date" property="registerDate" jdbcType="TIMESTAMP"/>
+        <result column="last_login_date" property="lastLoginDate" jdbcType="TIMESTAMP"/>
+        <result column="login_Count" property="loginCount" jdbcType="INTEGER"/>
+    </resultMap>
+
+    <!--增加一条数据-->
+
+    <insert id="insertMiaoShaUser" parameterType="com.geekq.miaosha.domain.MiaoshaUser"  keyProperty="id">
+
+        insert into miaosha_user (id, nickname, salt, register_date,last_login_date,login_Count ) values
+        (#{id,jdbcType=BIGINT},#{nickname,jdbcType=VARCHAR},
+        #{salt,jdbcType=VARCHAR},#{registerDate,jdbcType=DATE},#{lastLoginDate,jdbcType=DATE},
+        #{loginCount,jdbcType=INTEGER}
+        )
+    </insert>
+    
+    <!--更新一条数据-->
+    
+    <update id="updateMiaoShaUser" >
+        update miaosha_user set nickname = #{nickname},
+        login_Count = #{loginCount}
+        where id=#{id}
+    </update>
+
+    <!--删除一条数据-->
+    <delete id="deleteMiaoShaUser" parameterType="Long">
+    delete from miaosha_user
+    where id = #{id,jdbcType=BIGINT}
+    </delete>
+
+
+    <sql id="Base_Column_List"> id, nickname, salt, register_date,last_login_date,login_Count </sql>
+
+    <select id="getMiaoShaUserById" parameterType="LONG"  resultType="miaoshauser">
+        SELECT
+        <include refid="Base_Column_List"/>
+        FROM miaosha_user WHERE id = #{id}
+    </select>
+
+
+    <select id="getMiaoShaUserNum" resultType="int">
+      select count(*) from miaosha_user
+    </select>
+
+
+    <select id="countbyMenuId" parameterType="java.lang.Integer"
+            resultType="java.lang.Integer"> select count(*) from miaosha_user
+    </select>
+
+
+</mapper>