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); }}
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