pom配置:
<?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>cn.mepu</groupId> <artifactId>day06_spring_tx</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>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>org.springframework</groupId> <artifactId>spring-test</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.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.8.7</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> </dependencies> </project>
bean配置:
<?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"> <!-- 配置容器扫描包--> <context:component-scan base-package="cn.mepu"></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/javaee"></property> <property name="username" value="root"></property> <property name="password" value="root"></property> </bean> <!-- spring中基于xml的声明事务控制 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 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <!-- 注入DataSource--> <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>
dao配置;
package cn.mepu.dao.imp; import cn.mepu.dao.IAccountDao; import cn.mepu.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; /** * @author shkstart * @create 2019-11-10 16:09 */ @Repository("accountDao") public class AccountDaoImp implements IAccountDao { @Autowired private JdbcTemplate jdbcTemplate; public Account findAccountById(Integer accountId) { List<Account> accounts = jdbcTemplate.query("select * from account where id = ?",new BeanPropertyRowMapper<Account>(Account.class),accountId); return accounts.isEmpty()?null:accounts.get(0); } public Account findAccountByName(String accountName) { List<Account> accounts = jdbcTemplate.query("select * from account where name = ?",new BeanPropertyRowMapper<Account>(Account.class),accountName); if(accounts.isEmpty()){ return null; } if(accounts.size()>1){ throw new RuntimeException("结果集不唯一"); } return accounts.get(0); } public void updateAccount(Account account) { jdbcTemplate.update("update account set name=?,money=? where id=?",account.getName(),account.getMoney(),account.getId()); } }
service配置;
package cn.mepu.service.impl; import cn.mepu.dao.IAccountDao; import cn.mepu.domain.Account; import cn.mepu.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; /** * @author shkstart * @create 2019-11-11 8:43 */ @Service("accountService") @Transactional(propagation = Propagation.SUPPORTS,readOnly=true)//只读配置 public class AccountServiceImpl implements IAccountService { @Autowired private IAccountDao accountDao; @Override public Account findAccountById(Integer accountId) { return accountDao.findAccountById(accountId); } @Transactional(propagation = Propagation.REQUIRED,readOnly=false)//只读配置 public void transfer(String sourceName, String targetName, float money) { //2.1根据名称查询转出账户 Account source = accountDao.findAccountByName(sourceName); //2.2根据名称查询转入账户 Account target = accountDao.findAccountByName(targetName); //2.3转出账户减钱 source.setMoney(source.getMoney()-money); //2.4转入账户加钱 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); } }