第十一講:11.spring宣告式事務管理-xml方式
1,複製專案spring404 ,改名spring404-2,修改BankServiceImpl類,刪除宣告式事務的程式碼。宣告式事務管理的方式缺點是,事務程式碼嚴重嵌入邏輯程式碼中
package com.cruise.service.impl;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.TransactionCallbackWithoutResult;
import org.springframework.transaction.support.TransactionTemplate;
import com.cruise.dao.BankDao;
import com.cruise.service.BankService;
public class BankServiceImpl implements BankService{
private BankDao bankDao;
public void setBankDao(BankDao bankDao) {
this.bankDao = bankDao;
}
@Override
public void transferAccount(int money, int userA, int userB) {
bankDao.OutMoney(money, userA);
bankDao.InMoney(money, userB);
}
}
2,修改beans.xml,新增名稱空間,新增配置事務通知,新增配置事務切面,
<?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.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<context:property-placeholder location="jdbc.properties"/>
<bean id="dataSource1" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driverClassName}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<!--jdbc事物管理器-->
<bean id="transactionManager1"class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource1"></property>
</bean>
<tx:advice id="txAdvice1" transaction-manager="transactionManager1">
<tx:attributes>
<tx:method name="*"/>
</tx:attributes>
</tx:advice>
<aop:config>
<aop:pointcut id="serviceMethod1" expression="execution(* com.cruise.service.*.*(..))"/>
<aop:advisor advice-ref="txAdvice1" pointcut-ref="serviceMethod1"/>
</aop:config>
<bean id="namedParameterJdbcTemplate1"class="org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate">
<constructor-arg ref="dataSource1"></constructor-arg>
</bean>
<bean id="bankDao1" class="com.cruise.dao.impl.BankDaoImpl">
<property name="namedParameterJdbcTemplate" ref="namedParameterJdbcTemplate1"></property>
</bean>
<bean id="bankService" class="com.cruise.service.impl.BankServiceImpl">
<property name="bankDao" ref="bankDao1"></property>
</bean>
</beans>
3,BankDaoImpl程式碼
package com.cruise.dao.impl;
import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
import com.cruise.dao.BankDao;
public class BankDaoImpl implements BankDao{
private NamedParameterJdbcTemplate namedParameterJdbcTemplate;
public void setNamedParameterJdbcTemplate(NamedParameterJdbcTemplate namedParameterJdbcTemplate) {
this.namedParameterJdbcTemplate = namedParameterJdbcTemplate;
}
@Override
public void InMoney(int money, int userid) {
System.out.println(1/0);
String sql ="update t_account set balance=balance+:money where id=:userid";
MapSqlParameterSource msps= new MapSqlParameterSource();
msps.addValue("money", money);
msps.addValue("userid", userid);
namedParameterJdbcTemplate.update(sql, msps);
}
@Override
public void OutMoney(int money, int userid) {
String sql ="update t_account set balance=balance-:money where id=:userid";
MapSqlParameterSource msps= new MapSqlParameterSource();
msps.addValue("money", money);
msps.addValue("userid", userid);
namedParameterJdbcTemplate.update(sql, msps);
}
}
4,測試程式碼
package com.cruise.test;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.cruise.service.BankService;
public class T {
public static void main(String[] args) {
ClassPathXmlApplicationContext CPXAC=new ClassPathXmlApplicationContext("beans.xml");
BankService bankService = (BankService) CPXAC.getBean("bankService");
bankService.transferAccount(120, 1, 2);
}
}