Java高并发秒杀Api-业务分析与DAO层构建3

章节目录

• mybatis与spring整合过程
  • spring-dao.xml 配置
  • junit4 单元测试

1.mybatis与spring整合过程

1.1 spring-dao.xml 配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
    <!--配置整合mybatis-->
    <!--1:配置数据库相关参数-->
    <!-- 1:配置数据库相关参数properties的属性:${url} -->
    <context:property-placeholder location="classpath:jdbc.properties"/>

    <!--2.数据库连接池配置-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <!-- 配置连接池属性-->
        <property name="driverClass" value="${driver}" />
        <property name="jdbcUrl" value="${url}" />
        <property name="user" value="${username}" />
        <property name="password" value="${password}" />

        <!-- c3p0连接池的私有属性-->
        <property name="maxPoolSize" value="30" />
        <property name="minPoolSize" value="10" />
        <!-- 关闭连接后不自动commit-->
        <property name="autoCommitOnClose" value="false" />
        <!-- 获取连接超时时间 30个连接用完-->
        <property name="checkoutTimeout" value="1000" />
        <!-- 当获取连接失败重试次数-->
        <property name="acquireRetryAttempts" value="2" />
    </bean>

    <!-- 约定大于配置-->
    <!-- 3:配置SqlSessionFactory对象-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入数据库连接池-->
        <property name="dataSource" ref="dataSource" />
        <!-- 配置MyBatis全局配置文件：mybatis-config.xml-->
        <property name="configLocation" value="classpath:mybatis-config.xml" />
        <!-- 扫描entity包 使用别名-->
        <property name="typeAliasesPackage" value="org.seckill.domain" />
        <!-- 扫描sql配置文件；mapper需要的xml文件-->
        <property name="mapperLocations" value="classpath:mapper/*.xml" />
    </bean>

    <!--配置扫描Dao接口包，动态实现Dao接口 mapper 代理，并注入到Spring容器中 MapperScannerConfigurer-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--注入sqlSessionFactory,懒加载，用到的时候才加载-->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
        <!--给出扫描DAO接口包-->
        <property name="basePackage" value="org.seckill.dao"></property>
    </bean>

</beans>

2.junit 单元测试
SecKillDaoTest.java - 测试秒杀

package org.seckill.dao;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.seckill.domain.SecKill;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.util.Date;
import java.util.List;

/**
 * 配置spring 与 junit 启动时加载Spring IOC容器
 * spring-test,junit整合
 * 告诉junit Spring配置文件位置
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration({"classpath:spring/spring-dao.xml"})
public class SecKillDaoTest {
    //注入Dao类实现
    @Autowired
    private SecKillDao secKillDao;

    @Test
    public void queryById() throws Exception {
        long id = 1000;
        SecKill secKill = secKillDao.queryById(id);
        System.out.println(secKill.getName());
        System.out.println(secKill);
        /**
         * 1000元秒杀iphone x
         SecKill{seckillId=1000, name='1000元秒杀iphone x', stock=100, startTime=Fri May 04 00:00:00 CST 2018,
         endTime=Sat May 05 00:00:00 CST 2018, createTime=Sat May 05 00:05:03 CST 2018
         }
         */
    }

    /**
     * @throws Exception
     */
    @Test
    public void queryAll() throws Exception {
        // queryAll(offset,limit)->queryAll(arg0,arg1)
        List<SecKill> secKillList = secKillDao.queryAll(0, 100);
        for (SecKill secKill : secKillList) {
            System.out.println(secKill);
        }
        /**
         * SecKill{seckillId=1000, name='1000元秒杀iphone x', stock=100, startTime=Fri May 04 00:00:00 CST 2018, endTime=Sat May 05 00:00:00 CST 2018, createTime=Sat May 05 00:05:03 CST 2018}
         SecKill{seckillId=1001, name='500元秒杀ipad x', stock=200, startTime=Fri May 04 00:00:00 CST 2018, endTime=Sat May 05 00:00:00 CST 2018, createTime=Sat May 05 00:05:03 CST 2018}
         SecKill{seckillId=1002, name='300元秒杀小米4', stock=300, startTime=Fri May 04 00:00:00 CST 2018, endTime=Sat May 05 00:00:00 CST 2018, createTime=Sat May 05 00:05:03 CST 2018}
         SecKill{seckillId=1003, name='200元秒杀小米note', stock=400, startTime=Fri May 04 00:00:00 CST 2018, endTime=Sat May 05 00:00:00 CST 2018, createTime=Sat May 05 00:05:03 CST 2018}
         */
    }

    @Test
    public void reduceStock() throws Exception {
        Date killTime = new Date();
        int updateCount = secKillDao.reduceStock(1000L, killTime);
        System.out.println(updateCount);
    }


}

测试秒杀明细

package org.seckill.dao;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.seckill.domain.SuccessKilled;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:spring/spring-dao.xml")
public class SuccessKilledDaoTest {
    @Autowired
    private SuccessKilledDao successKilledDao;

    @Test
    public void insertSuccessKilled() throws Exception {
        int successCount = successKilledDao.insertSuccessKilled(1001L, "15300815999");
        System.out.println("insertCount=" + successCount);
    }

    @Test
    public void queryByIdWithSecKill() throws Exception {
        //1个用户只能查询到属于自己的一个秒杀明细
        long id = 1001L;
        String phone = "15300815999";
        SuccessKilled successKilled = successKilledDao.queryByIdWithSecKill(id, phone);
        System.out.println(successKilled);

    }

}

接下来是service 层的构建