项目组织结构如下：
一、pom依赖：
pom.xml
<?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>
<groupId>com.zl</groupId>
<artifactId>spring_day04_transaction_xml</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.0.2.RELEASE</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.0.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>5.0.2.RELEASE</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.13</version>
</dependency>
</dependencies>
</project>
二、实体类Account:
package com.zl.domain;
import java.io.Serializable;
public class Account implements Serializable {
private Integer id;
private String name;
private Float money;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Float getMoney() {
return money;
}
public void setMoney(Float money) {
this.money = money;
}
@Override
public String toString() {
return "Account{" +
"id=" + id +
", name='" + name + '\'' +
", money=" + money +
'}';
}
}
三、Service层：
com.zl.service.AccountService接口:
package com.zl.service;
public interface AccountService {
/**
* 转账
* @param sourceName 转出账户名称
* @param targetName 转入账户名称
* @param money 转账金额
*/
void transfer(String sourceName,String targetName,Float money);
}
com.zl.service.AccountServiceImpl实现类：
package com.zl.service.impl;
import com.zl.dao.AccountDao;
import com.zl.domain.Account;
import com.zl.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
@Service("accountService")
//只读型
@Transactional(propagation = Propagation.SUPPORTS,readOnly = true)
public class AccountServiceImpl implements AccountService {
@Autowired
private AccountDao accountDao;
//读写型
@Transactional(propagation = Propagation.REQUIRED,readOnly = false)
public void transfer(String sourceName, String targetName, Float money) {
//1.根据名称查询两个账户名称
Account source = accountDao.findAccountByName(sourceName);
Account target = accountDao.findAccountByName(targetName);
//修改两个账户的金额
source.setMoney(source.getMoney()-money);
target.setMoney(target.getMoney()+money);
//3.更新两个账户
accountDao.updateAccount(source);
// int i = 1/0;
accountDao.updateAccount(target);
}
}
四、Dao层：
`com.zl.Dao接口：
package com.zl.dao;
import com.zl.domain.Account;
public interface AccountDao {
/**
* 根据账户名称查询账户
* @param name
* @return
*/
Account findAccountByName(String name);
/**
* 更新账户
* @param account
*/
void updateAccount(Account account);
}
com.zl.dao.impl.AccountDaoImpl实现类：
package com.zl.dao.impl;
import com.zl.dao.AccountDao;
import com.zl.domain.Account;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;
import java.util.List;
@Repository("accountDao")
public class AccountDaoImpl implements AccountDao {
@Autowired
private JdbcTemplate jt;
public Account findAccountByName(String name) {
List<Account> accounts = jt.query("select * from account where name=?", new BeanPropertyRowMapper<Account>(Account.class), name);
if(accounts.isEmpty()){
return null;
}else if(accounts.size()>1){
throw new RuntimeException("根据名称查询得到的结果不唯一...");
}
return accounts.get(0);
}
public void updateAccount(Account account) {
jt.update("update account set money=? where id=?",account.getMoney(),account.getId());
}
}
四、AOP主配置文件：
resources.bean.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:tx="http://www.springframework.org/schema/tx"
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/tx
http://www.springframework.org/schema/tx/spring-tx.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">
<!-- 配置spring创建容器时要扫描的包-->
<context:component-scan base-package="com.zl"></context:component-scan>
<!-- 配置JdbcTemplate-->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 配置数据源-->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://localhost:3306/spring"></property>
<property name="username" value="root"></property>
<property name="password" value="root"></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>
<!-- 开启spring对注解事务的支持-->
<tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven>
</beans>
需要注意的是：当我们使用环绕通知时，其他四个通知无法使用，否则反之。
五、测试类：
import com.zl.service.AccountService;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class TestTx {
private ApplicationContext app;
private AccountService accountService;
@Before
public void init(){
app = new ClassPathXmlApplicationContext("bean.xml");
accountService = app.getBean("accountService", AccountService.class);
}
@Test
public void testTransfer(){
accountService.transfer("aaa","bbb",100f);
}
}
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