spring基于注解的声明式事务控制配置
配置文件：
<?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
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx
https://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
https://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd">
<!--配置spring创建容器时需要扫描的包-->
<context:component-scan base-package="com.itheima"></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.cj.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://localhost:3306/eesy?serverTimezone=Asia/Shanghai&characterEncoding=utf8&useSSL=false"></property>
<property name="username" value="root"></property>
<property name="password" value="123456"></property>
</bean>
<!--spring中基于注解的声明式事务控制配置步骤
1.配置事务管理器
2.开启spring对注解事务的支持
3.在需要事务支持的地方使用@Transactional注解-->
<!--配置事务管理-->
<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>
service实现类：
package com.itheima.service.impl;
import com.itheima.Dao.IAccountDao;
import com.itheima.domain.Account;
import com.itheima.service.IAccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import java.util.List;
/**
* @Author: lijiahao
* @Description:
* @Data: Create in 0:16 2020/2/6
* @Modified By:
*/
@Service("accountService")
@Transactional(propagation = Propagation.SUPPORTS,readOnly = true)//只读型事务的配置
public class AccountServiceImpl implements IAccountService {
@Autowired
private IAccountDao accountDao;
public Account findAccountById(Integer accountid) {
return accountDao.findAccountById(accountid);
}
//需要的是读写型事务配置
@Transactional(propagation = Propagation.REQUIRED,readOnly = false)
public void transfer(String sourceName, String targetName, Float money) {
System.out.println("trans......");
//2.1.根据名称查询转出帐户
Account source = accountDao.findAccountByName(sourceName);
//2.2.根据名称查询转入帐户
Account target = accountDao.findAccountByName(targetName);
//2.3.转出账户减钱
source.setMoney(source.getMoney()-money);
//2.4.转入帐户加钱
target.setMoney(target.getMoney()+money);
//2.5.更新转出账户
accountDao.updateAccount(source);
int i = 1/0;
//2.6.更新转入账户
accountDao.updateAccount(target);
}
}
dao层实现类：
package com.itheima.Dao.impl;
import com.itheima.Dao.IAccountDao;
import com.itheima.domain.Account;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.support.JdbcDaoSupport;
import org.springframework.stereotype.Repository;
import java.util.List;
/**
* @Author: lijiahao
* @Description:
* @Data: Create in 2:32 2020/2/9
* @Modified By:
*/
@Repository("accountDao")
public class AccountDaoImpl implements IAccountDao {
@Autowired
private JdbcTemplate jdbcTemplate;
public Account findAccountById(Integer id) {
List<Account> accountList = jdbcTemplate.query("select * from account where id = ?", new BeanPropertyRowMapper<Account>(Account.class),id);
return accountList.isEmpty()?null:accountList.get(0);
}
public Account findAccountByName(String name) {
List<Account> accountList = jdbcTemplate.query("select * from account where name = ?", new BeanPropertyRowMapper<Account>(Account.class),name);
if(accountList.isEmpty()){
return null;
}
if(accountList.size()>1){
throw new RuntimeException("结果集不唯一");
}
return accountList.get(0);
}
public void updateAccount(Account account) {
jdbcTemplate.update("update account set name=? ,money=? where id = ?", account.getName(),account.getMoney(),account.getId());
}
}
实体类：
package com.itheima.domain;
import java.io.Serializable;
/**
* @Author: lijiahao
* @Description: 账户的实体类
* @Data: Create in 1:32 2020/2/9
* @Modified By:
*/
public class Account implements Serializable {
private Integer id;
private String name;
private Float money;
@Override
public String toString() {
return "account{" +
"id=" + id +
", name='" + name + '\'' +
", money=" + 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;
}
}
测试：
package com.itheima.test;
import com.itheima.domain.Account;
import com.itheima.service.IAccountService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import java.util.List;
/**
* @Author: lijiahao
* @Description: 使用junit测试配置
* @Data: Create in 0:59 2020/2/6
* @Modified By:
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations="classpath:bean.xml")
public class AccountServiceTest {
@Autowired
private IAccountService as;
@Test
public void testTransfer(){
as.transfer("aaa", "bbb", 100f);
}
}
