[原创]spring及springmvc精简版--继承数据源，声明式事物

1.前期：导入c3p0 jar包，相关数据库连接jar包，我用的是mysql

2.关注事物管理器的配置和AOP配置

代码： 核心关注bean配置文件

application.xml

 <?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:aop="http://www.springframework.org/schema/aop"
     xmlns:context="http://www.springframework.org/schema/context"
     xmlns:tx="http://www.springframework.org/schema/tx"
     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
         http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
         http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
     <!-- 加载属性文件 -->
     <context:property-placeholder location="classpath:db.properties"/>

     <!-- 初始化数据源的bean -->
     <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
         <property name="driverClass" value="${driverClassName1}"></property>
         <property name="jdbcUrl" value="${url1}"></property>
         <property name="user" value="${username1}"></property>
         <property name="password" value="${password1}"></property>
         <property name="maxPoolSize" value="${maxActive1}"></property>
         <property name="initialPoolSize" value="${initialSize1}"></property>
     </bean>
     <!-- 配置jdbcTemplate -->
     <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
         <property name="dataSource" ref="dataSource"></property>

     </bean>

     <bean id="person" class="com.bean.Person"></bean>

     <bean id="dao" class="com.dao.Dao">
         <property name="jdbcTemplate" ref="jdbcTemplate"></property>
     </bean>
     <bean id="service" class="com.service.Service">
         <property name="dao" ref="dao"></property>
     </bean>

     <!-- 购买商品的bean -->
     <bean id="users" class="com.bean.Users"></bean>
     <bean id="goods" class="com.bean.Goods"></bean>
     <bean id="usersDao" class="com.dao.UsersDao">
         <property name="jdbcTemplate" ref="jdbcTemplate"></property>
     </bean>
     <bean id="goodsDao" class="com.dao.GoodsDao">
         <property name="jdbcTemplate" ref="jdbcTemplate"></property>
     </bean>
     <bean id="buyService" class="com.service.BuyService">
         <property name="goodsDao" ref="goodsDao"></property>
         <property name="usersDao" ref="usersDao"></property>
     </bean>
     <bean id="buyMarthService" class="com.service.BuyMarthService">
         <property name="buyService" ref="buyService"></property>
     </bean>

     <!-- 配置事务管理器 -->
     <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
         <property name="dataSource" ref="dataSource"></property>
     </bean>
     <!-- 配置事务属性 -->
     <tx:advice id="txa" transaction-manager="transactionManager">
         <tx:attributes>
             <tx:method name="buyOneGoods" propagation="REQUIRES_NEW"/>
             <tx:method name="*"/>
         </tx:attributes>
     </tx:advice>
     <!-- 配置事务aop

      -->

     <aop:config>
         <aop:pointcut expression="execution(* com.service.*.*(..))" id="pc"/>
         <aop:advisor advice-ref="txa" pointcut-ref="pc"/>
     </aop:config>
 </beans>

db.properties

 driverClassName1 = com.mysql.jdbc.Driver
 url1 = jdbc:mysql://localhost:3306/test
 username1 = root
 password1 = mysql
 maxActive1 = 50
 initialSize1 =20

com.bean

Users

 package com.bean;

 public class Goods {

     private int gid;
     private int gprice;
     private int gnum;
     public int getGid() {
         return gid;
     }
     public void setGid(int gid) {
         this.gid = gid;
     }
     public int getGprice() {
         return gprice;
     }
     public void setGprice(int gprice) {
         this.gprice = gprice;
     }
     public int getGnum() {
         return gnum;
     }
     public void setGnum(int gnum) {
         this.gnum = gnum;
     }

 }

Person

 package com.bean;

 public class Person {

     private String name;
     private int age;
     public String getName() {
         return name;
     }
     public void setName(String name) {
         this.name = name;
     }
     public int getAge() {
         return age;
     }
     public void setAge(int age) {
         this.age = age;
     }

 }

User

 package com.bean;

 public class Users {

     private int uid    ;
     private String uname;
     private int umoney;
     public int getUid() {
         return uid;
     }
     public void setUid(int uid) {
         this.uid = uid;
     }
     public String getUname() {
         return uname;
     }
     public void setUname(String uname) {
         this.uname = uname;
     }
     public int getUmoney() {
         return umoney;
     }
     public void setUmoney(int umoney) {
         this.umoney = umoney;
     }

 }

DAO

DAO

 package com.dao;
 import org.springframework.jdbc.core.JdbcTemplate;

 import com.bean.Person;

 public class Dao {

     private JdbcTemplate jdbcTemplate;
     public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
         this.jdbcTemplate = jdbcTemplate;
     }

     public int update(Person p){
         int num = jdbcTemplate.update("update person set name=? where age=?", p.getName(),p.getAge());
         return num;
     }
 }

GoodsDao

 package com.dao;

 import org.springframework.jdbc.core.JdbcTemplate;

 public class GoodsDao {

     private JdbcTemplate jdbcTemplate;

     public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
         this.jdbcTemplate = jdbcTemplate;
     }

     public int getGpriceByGid(int gid){
         int gprice = jdbcTemplate.queryForObject("select gprice from goods where gid=?", Integer.class, gid);
         return gprice;
     }

     public int getGnumByGid(int gid){
         int gnum = jdbcTemplate.queryForObject("select gnum from goods where gid=?", Integer.class, gid);
         return gnum;
     }

     public void updateGnum(int gid,int num){
         jdbcTemplate.update("update goods set gnum=gnum-? where gid=?", num,gid);
     }
 }

UserDao

package com.dao;

import org.springframework.jdbc.core.JdbcTemplate;

public class UsersDao {
    private JdbcTemplate jdbcTemplate;
    public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }

    public int getMoneyByUid(int uid){
        int umoney = jdbcTemplate.queryForObject("select umoney from users where uid=?", Integer.class, uid);
        return umoney;
    }
    public void updateUmoney(int uid,int price){
        jdbcTemplate.update("update users set umoney=umoney-? where uid=?", price,uid);
    }
}

Service

 package com.service;

 public class BuyMarthService {

     private BuyService buyService;
     public void setBuyService(BuyService buyService) {
         this.buyService = buyService;
     }

     public void buygoodsList(int uid,int[] gids,int[] nums){
         for(int i = 0;i<gids.length;i++){
             buyService.buyOneGoods(uid, gids[i], nums[i]);
         }

     }
 }

 package com.service;

 import com.dao.GoodsDao;
 import com.dao.UsersDao;

 public class BuyService {

     private UsersDao usersDao;
     private GoodsDao goodsDao;
     public void setGoodsDao(GoodsDao goodsDao) {
         this.goodsDao = goodsDao;
     }
     public void setUsersDao(UsersDao usersDao) {
         this.usersDao = usersDao;
     }

     public void buyOneGoods(int uid,int gid,int num){
         /*
          * 1-获取商品的库存
          * 2-验证库存是否足够
          *  1-不足：抛出异常  (回滚)
          *  2-足：修改商品的库存
          * 3-修改余额等同2
          */
         int gnum = goodsDao.getGnumByGid(gid);
         if(gnum <= num){
             throw new RuntimeException("商品库存不足");
         }
         goodsDao.updateGnum(gid, num);
         int gprice = goodsDao.getGpriceByGid(gid);
         int umoney = usersDao.getMoneyByUid(uid);
         if(umoney < gprice*num){
             throw new RuntimeException("用户余额不足");
         }
         usersDao.updateUmoney(uid, gprice*num);
     }

 }

 package com.service;

 import com.bean.Person;
 import com.dao.Dao;

 public class Service {

     private Dao dao;
     public void setDao(Dao dao) {
         this.dao = dao;
     }
     public void updatePerson(Person p){
         dao.update(p);
     }
 }