基于XML的方式配置事务

直接看代码：

package logan.study.spring.tx.xml;

public interface BookShopDao {

    //根据书号获取书的单价

    public int findBookPriceIsbn(String isbn);

    //更新书的库存，使书号对应的库存-1

    public void updateBookStock(String isbn);

    public void updateUserAccount(String username,int price);

}
package logan.study.spring.tx.xml;

import org.springframework.jdbc.core.JdbcTemplate;

public class BookShopDaoImpl implements BookShopDao {

    private JdbcTemplate jdbcTemplate;

    public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {

        this.jdbcTemplate = jdbcTemplate;

    }

    @Override

    public int findBookPriceIsbn(String isbn) {

        // TODO Auto-generated method stub

        String sql = "SELECT price FROM book WHERE isbn=?";

        return jdbcTemplate.queryForObject(sql, Integer.class, isbn);

    }

    @Override

    public void updateBookStock(String isbn) {

        // TODO Auto-generated method stub

        //检查书的库存是否足够，若不够，则抛出异常

        String sql2 = "SELECT stock FROM book_stock WHERE isbn = ?";

        int stock = jdbcTemplate.queryForObject(sql2, Integer.class, isbn);

        if(stock == 0){

            throw new BookStockException("库存不足！");

        }

        String sql = "UPDATE book_stock SET stock = stock -1 WHERE isbn = ?";

        jdbcTemplate.update(sql, isbn);

    }

    @Override

    public void updateUserAccount(String username, int price) {

        // TODO Auto-generated method stub

        //检查书的库存是否足够，若不够，则抛出异常

        String sql2 = "SELECT balance FROM account WHERE username = ?";

        int balance = jdbcTemplate.queryForObject(sql2, Integer.class, username);

        if(balance < price){

            throw new UserAccountException("余额不足！");

        }

        String sql = "UPDATE account SET balance = balance - ? WHERE username = ?";

        jdbcTemplate.update(sql, price, username);

    }

}
package logan.study.spring.tx.xml;

public interface BookShopService {

    public void purchase(String username, String isbn);

}
package logan.study.spring.tx.xml;

public class BookShopServiceImpl implements BookShopService {

    private BookShopDao bookShopDao;

    public void setBookShopDao(BookShopDao bookShopDao) {

        this.bookShopDao = bookShopDao;

    }

    @Override

    public void purchase(String username, String isbn) {

        // TODO Auto-generated method stub

        //1.获取书的单价

        int price = bookShopDao.findBookPriceIsbn(isbn);

        //2.更新书的库存

        bookShopDao.updateBookStock(isbn);

        //3.更新用户余额

        bookShopDao.updateUserAccount(username, price);

    }

}
package logan.study.spring.tx.xml;

public class BookStockException extends RuntimeException{

    public BookStockException() {

        super();

        // TODO Auto-generated constructor stub

    }

    public BookStockException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {

        super(message, cause, enableSuppression, writableStackTrace);

        // TODO Auto-generated constructor stub

    }

    public BookStockException(String message, Throwable cause) {

        super(message, cause);

        // TODO Auto-generated constructor stub

    }

    public BookStockException(String message) {

        super(message);

        // TODO Auto-generated constructor stub

    }

    public BookStockException(Throwable cause) {

        super(cause);

        // TODO Auto-generated constructor stub

    }

}
package logan.study.spring.tx.xml;

import java.util.List;

public interface Cashier {

    public void checkout(String username,List<String> isbns);

}
package logan.study.spring.tx.xml;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

import org.springframework.transaction.annotation.Isolation;

import org.springframework.transaction.annotation.Propagation;

import org.springframework.transaction.annotation.Transactional;

public class CashierImpl implements Cashier{

    private BookShopService bookShopService;

    public void setBookShopService(BookShopService bookShopService) {

        this.bookShopService = bookShopService;

    }

    @Override

    public void checkout(String username, List<String> isbns) {

        // TODO Auto-generated method stub

        for(String isbn:isbns){

            bookShopService.purchase(username, isbn);

        }

    }

}
package logan.study.spring.tx.xml;

import static org.junit.Assert.*;

import java.util.Arrays;

import org.junit.Test;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import org.springframework.jdbc.core.JdbcTemplate;

public class SpringTransactionTest {

    private ApplicationContext ctx = null;

    private BookShopDao bookShopDao = null;

    private BookShopService bookShopService = null;

    private Cashier cashier = null;

    {

        ctx = new ClassPathXmlApplicationContext("applicationContext-xml.xml");

        bookShopDao = ctx.getBean(BookShopDao.class);

        bookShopService = ctx.getBean(BookShopService.class);

        cashier = ctx.getBean(Cashier.class);

    }

    @Test

    public void testTransactionalPropagation(){

        cashier.checkout("AA", Arrays.asList("1001","1002"));

    }

    @Test

    public void testBookShopService(){

        bookShopService.purchase("AA", "1001");

    }

}
package logan.study.spring.tx.xml;

public class UserAccountException extends RuntimeException{

    public UserAccountException() {

        super();

        // TODO Auto-generated constructor stub

    }

    public UserAccountException(String message, Throwable cause, boolean enableSuppression,

            boolean writableStackTrace) {

        super(message, cause, enableSuppression, writableStackTrace);

        // TODO Auto-generated constructor stub

    }

    public UserAccountException(String message, Throwable cause) {

        super(message, cause);

        // TODO Auto-generated constructor stub

    }

    public UserAccountException(String message) {

        super(message);

        // TODO Auto-generated constructor stub

    }

    public UserAccountException(Throwable cause) {

        super(cause);

        // TODO Auto-generated constructor stub

    }

}
<?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"

    xmlns:tx="http://www.springframework.org/schema/tx"

    xmlns:aop="http://www.springframework.org/schema/aop"

    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-4.3.xsd

        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd

        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">

    <context:component-scan base-package="logan.study.spring.tx"></context:component-scan>

    <!-- 导入资源文件 -->

    <context:property-placeholder location="classpath:db.properties"/>

    <!-- 配置C3P0数据源 -->

    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">

        <property name="user" value="${jdbc.user}"></property>

        <property name="password" value="${jdbc.password}"></property>

        <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>

        <property name="driverClass" value="${jdbc.driverClass}"></property>

        <property name="initialPoolSize" value="${jdbc.initPoolSize}"></property>

        <property name="maxPoolSize" value="${jdbc.maxPoolSize}"></property>

    </bean>

    <!-- 配置Spring的JDBCTemplate -->

    <bean id="jdbcTemplate"

    class="org.springframework.jdbc.core.JdbcTemplate">

        <property name="dataSource" ref="dataSource"></property>

    </bean>

    <!-- 配置bean -->

    <bean id="bookShopDao" class="logan.study.spring.tx.xml.BookShopDaoImpl">

        <property name="jdbcTemplate" ref="jdbcTemplate"></property>

    </bean>

    <bean id="bookShopService" class="logan.study.spring.tx.xml.BookShopServiceImpl">

        <property name="bookShopDao" ref="bookShopDao"></property>

    </bean>

    <bean id="cashier" class="logan.study.spring.tx.xml.CashierImpl">

        <property name="bookShopService" ref="bookShopService"></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="txAdvice" transaction-manager="transactionManager">

        <tx:attributes>

            <!-- 根据方法名指定事务的属性 -->

            <tx:method name="purchase" propagation="REQUIRES_NEW"/>

            <tx:method name="get*" read-only="true"/>

            <tx:method name="find*" read-only="true"/>

            <tx:method name="*"/>

        </tx:attributes>

    </tx:advice>

    <!-- 配置事务切入点，以及把事务切入点和事务属性关联起来 -->

    <aop:config>

        <aop:pointcut expression="execution(* logan.study.spring.tx.xml.BookShopService.*(..) )"

        id="txPointCut"/>

        <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointCut"/>

    </aop:config>

</beans>

db.properties

jdbc.user=root

jdbc.password=logan123

jdbc.driverClass=com.mysql.jdbc.Driver

jdbc.jdbcUrl=jdbc:mysql://localhost:3306/spring

jdbc.initPoolSize=5

jdbc.maxPoolSize=10

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