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秒杀系统(二)——构建maven多模块项目及用户模块测试

作者:互联网

项目地址:https://github.com/shenweiquan/ms

后端整体项目结构:

 

 

 步骤说明:

1):创建父工程

创建一个maven工程,填写基本信息。创建完成后可以删除src文件夹

 

 

 2): 创建子工程

创建子工程的步骤基本一样,这里举例创建web子工程,我这里创建的是springboot项目。

 

 

 同样填写你自己的信息。

 

 

 创建好项目之后,可以看一下pom.xml文件看parent是否正确。

 

 

 不正确的话可以相应修改。这里我原本是不正确的,parent是上图注释内容。后来我直接修改了。注意我这里修改后父工程中的

parent也进行了修改。下面是父工程的pom.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.7.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.xxx</groupId>
    <artifactId>ms-parent</artifactId>
    <packaging>pom</packaging>
    <version>1.0</version>
  <!--子模块--> <modules> <module>ms-pojo</module> <module>ms-dao</module> <module>ms-service</module> <module>ms-web</module> <module>ms-common</module> </modules> <dependencies> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.2</version> </dependency> <!--<dependency>--> <!--<groupId>mysql</groupId>--> <!--<artifactId>mysql-connector-java</artifactId>--> <!--</dependency>--> <!--mysql驱动包--> <!--<dependency>--> <!--<groupId>mysql</groupId>--> <!--<artifactId>mysql-connector-java</artifactId>--> <!--<version>5.1.35</version>--> <!--</dependency>--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <!--druid连接池--> <!--<dependency>--> <!--<groupId>com.alibaba</groupId>--> <!--<artifactId>druid</artifactId>--> <!--<version>1.0.18</version>--> <!--</dependency>--> </dependencies> </project>

其余模块步骤基本一致。我这里除web模块是springboot工程之外,其余都是普通的maven工程。

3): 测试用户模块

  pojo模块创建bean

package com.swq.pojo;

/**
 * 商家实体类
 * @date:5.11
 * @author :swq
 *
 */
public class Merchant {
    private long id; //主键
    private String merchantname; //商家名
    private String merchantaccount;//商家账号

    public String getMerchantpassword() {
        return merchantpassword;
    }

    public void setMerchantpassword(String merchantpassword) {
        this.merchantpassword = merchantpassword;
    }

    private String merchantpassword;//商家账号密码

    public long getId() {
        return id;
    }

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

    public String getMerchantname() {
        return merchantname;
    }

    public void setMerchantname(String merchantname) {
        this.merchantname = merchantname;
    }

    public String getMerchantaccount() {
        return merchantaccount;
    }

    public void setMerchantaccount(String merchantaccount) {
        this.merchantaccount = merchantaccount;
    }



    @Override
    public String toString() {
        return "Merchant{" +
                "id=" + id +
                ", merchantname='" + merchantname + '\'' +
                ", merchantaccount='" + merchantaccount + '\'' +
                ", merchantpassword='" + merchantpassword + '\'' +
                '}';
    }
}

  dao模块创建mapper接口文件

package com.swq.ms.dao.merchant;

import com.swq.pojo.Merchant;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;


import java.util.List;

/**
 * 商家mapper
 * @date: 5.11
 * @author : swq
 */

@Mapper
public interface MerchantMapper {

    void insertMerchant(Merchant merchant); //添加商家

    Merchant selectMerchantById(long id); //根据id查询商家

    List<Merchant> selectAllMerchant(); //查询所有商家

    void updateMerchant(Merchant merchant); //更新商家信息

    void deleteMerchant(long id);//删除商家

}

其次在dao模块下的resource文件夹中创建mapper文件夹,以及mapper.xml文件

 

 

 MerchantMapper.xml

<?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.swq.ms.dao.merchant.MerchantMapper">

    <resultMap id="MerchantMap" type="Merchant">
        <id property="id" column="id"/>
        <result property="merchantname" column="merchant_name"/>
        <result property="merchantaccount" column="merchant_account" />
        <!--不需要密码-->
    </resultMap>

    <insert id="insertMerchant" parameterType="Merchant" >
        insert into merchant(merchant_name,merchant_account,merchant_password)
        values (#{merchantname},#{merchantaccount},#{merchantpassword})
    </insert>

    <select id="selectMerchantById" parameterType="Long" resultMap="MerchantMap">
        select * from merchant where id = #{id}
    </select>


    <select id="selectAllMerchant" resultMap="MerchantMap">
        select * from merchant;
    </select>

    <update id="updateMerchant" parameterType="Merchant">
        update merchant
        <trim prefix="set" suffixOverrides=",">

          <if test="merchantname != null">
              merchant_name = #{merchantname},
          </if>
          <if test=" merchantaccount !=  null ">
              merchant_account = #{merchantaccount},
          </if>
          <if test=" merchantpassword !=  null ">
                merchant_password = #{merchantpassword},
          </if>

        </trim>
        where  id = #{id}

    </update>

    <delete id="deleteMerchant" parameterType="Long">
        delete from merchant where id = #{id}
    </delete>

</mapper>

注意dao模块需要导入pojo模块。

service模块创建service接口及实现,实现类记得加@service

 

 

 

package com.swq.ms.service.merchant;


import com.swq.pojo.Merchant;
import org.springframework.stereotype.Service;

import java.util.List;



public interface MerchantService {

    void insertMerchant(Merchant merchant); //添加商家

    Merchant selectMerchantById(long id); //根据id查询商家

    List<Merchant> selectAllMerchant(); //查询所有商家

    void updateMerchant(Merchant merchant); //更新商家信息

    void deleteMerchant(long id);//删除商家
}
package com.swq.ms.service.merchant.impl;

import com.swq.ms.dao.merchant.MerchantMapper;
import com.swq.ms.service.merchant.MerchantService;
import com.swq.pojo.Merchant;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;



@Service
public class MerchantServiceImpl implements MerchantService {

    @Autowired
    MerchantMapper merchantMapper;

    @Override
    public void insertMerchant(Merchant merchant) {
        merchantMapper.insertMerchant(merchant);
    }

    @Override
    public Merchant selectMerchantById(long id) {
        return merchantMapper.selectMerchantById(id);
    }

    @Override
    public List<Merchant> selectAllMerchant() {
        return merchantMapper.selectAllMerchant();
    }

    @Override
    public void updateMerchant(Merchant merchant) {
        merchantMapper.updateMerchant(merchant);
    }

    @Override
    public void deleteMerchant(long id) {
        merchantMapper.deleteMerchant(id);
    }
}

最重要的是web模块

先看配置文件,重点是mybatis的配置

server:
  port: 8099
  #配置数据源
spring:
  datasource:
    driverClassName: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/swqms?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=UTC
    username: root
    password: root
#      type: com.alibaba.druid.pool.DruidDataSource
#      #连接池配置
#      # 初始化大小,最小等待连接数量,最大等待连接数量,最大连接数
#      initialsize: 1
#      minidle: 1
#      maxidle: 5
#      maxActive: 20
#      #最长等待时间
#      maxWait: 6000
#      # 配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒
#      timeBetweenEvictionRunsMillis: 60000
#      # 配置一个连接在池中最小生存的时间,单位是毫秒
#      minEvictableIdleTimeMillis: 300000
#      validationQuery: SELECT 1 FROM DUAL
#      testWhileIdle: true
#      testOnBorrow: true
#      testOnReturn: false
#      # 打开PSCache,并且指定每个连接上PSCache的大小
#      poolPreparedStatements: false
#      maxPoolPreparedStatementPerConnectionSize: 20
#      # 配置监控统计拦截的filters,去掉后监控界面sql无法统计,'wall'用于防火墙
#      filters: stat,wall,log4j
#      # 通过connectProperties属性来打开mergeSql功能;慢SQL记录
#      connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
#      # 合并多个DruidDataSource的监控数据
#      #spring.datasource.useGlobalDataSourceStat=true
#
#
#  #druid监控
#  druid:
#    login:
#      username: root
#      password: root

#mybatis配置
mybatis:
  mapper-locations: classpath*:/mapper/*.xml
  type-aliases-package: com.swq.pojo

然后是web模块的启动文件:

这里重要的是mapper扫描和service扫描。起初我sacnbasePackage扫描service,能扫描serivice但是无法扫描controller包下的内容。

 

 

 后来干脆使用@ComponSacn显式扫描controller,注意不能使用scanbasePackage配置扫描service和controller,有人可以,但我这里尝试后不行。

package com.swq.ms.web;


import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;




@MapperScan("com.swq.ms.dao") //扫描mapper
@SpringBootApplication
@ComponentScan({"com.swq.ms.service.*","com.swq.ms.web.controller"}) //扫描服务类和接口
public class MsWebApplication {

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

}

最后使用postman测试成功。

 

标签:merchant,public,maven,秒杀,模块,swq,import,com,id
来源: https://www.cnblogs.com/swqblog/p/12871011.html