半注解实现
- 配置spring中基于注解的申明事务控制的配置步骤
- 配置事务管理器
- 开启spring对注解事务的支持
- 在需要事务支持的地方使用@Transactional
- 建立事务通知和切入点表达式的关系
- 配置事务的属性:是在事务通知tx:advice标签内部
- 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创建容器时需要扫描的包-->
<context:component-scan base-package="com.whut"/>
<!--配置jdbcTemplate-->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"/>
</bean>
<!--配置数据源-->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<!--连接数据库必备信息-->
<property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/my_db?serverTimezone=UTC"/>
<property name="username" value="root"/>
<property name="password" value="fy123"/>
</bean>
<!--配置事务管理器-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!--开启spring对注解事务的支持-->
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>
- 业务层
@Service("accountService")
@Transactional(propagation = Propagation.SUPPORTS, readOnly = true)
public class AccountServiceImp implements AccountService {
@Autowired
private AccountDao accountDao;
@Override
public Account findAccountById(int id) {
return accountDao.findAccountById(id);
}
@Transactional(propagation = Propagation.REQUIRED, readOnly = false)
public void transfer(String sourceName, String targetName, float money) {
Account sourceAccount = accountDao.findAccountByName(sourceName);
Account targetAccount = accountDao.findAccountByName(targetName);
sourceAccount.setAccount(sourceAccount.getAccount() - money);
targetAccount.setAccount(targetAccount.getAccount() + money);
accountDao.updateAccount(sourceAccount);
accountDao.updateAccount(targetAccount);
}
}
- 持久层
@Repository("accountDao")
public class AccountDaoImp implements AccountDao {
@Autowired
private JdbcTemplate jdbcTemplate;
@Override
public Account findAccountByName(String name) {
try {
List<Account> accounts = jdbcTemplate.query("select * from springaccount where name=?", new BeanPropertyRowMapper<Account>(Account.class),name);
if (accounts == null || accounts.size() == 0){
return null;
}
if (accounts.size() > 1){
throw new RuntimeException("结果不唯一,数据有问题");
}
return accounts.get(0);
}catch (Exception e){
throw new RuntimeException(e);
}
}
@Override
public void updateAccount(Account account) {
try {
jdbcTemplate.update("update springaccount set name=? ,account=? where id=?",account.getName(),account.getAccount(),account.getId());
}catch (Exception e){
throw new RuntimeException(e);
}
}
@Override
public Account findAccountById(int id) {
try {
List<Account> accounts = jdbcTemplate.query("select * from springaccount where id=?", new BeanPropertyRowMapper<Account>(Account.class),id);
return accounts.isEmpty() ? null : accounts.get(0);
}catch (Exception e){
throw new RuntimeException(e);
}
}
}
- 测试方法
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:bean.xml")
public class AccountServiceTest {
@Autowired
private AccountService accountService;
@Test
public void testFindAllUsers(){
accountService.transfer("张三","李四",100);
Account user1 = accountService.findAccountById(1);
Account user2 = accountService.findAccountById(2);
System.out.printf(user1.toString());
System.out.printf(user2.toString());
}
}
纯注解实现
- 创建spring的配置类
@Configuration
@ComponentScan("com.whut")
@Import({
JdbcConfig.class,TransactionConfig.class})
@PropertySource("classpath:jdbcConfig.properties")
@EnableTransactionManagement
public class SpringConfiguration {
}
- 创建jdbc配置类
public class JdbcConfig {
@Value("${jdbc.driver}")
private String driverClass;
@Value("${jdbc.url}")
private String url;
@Value("${jdbc.username}")
private String username;
@Value("${jdbc.password}")
private String password;
@Bean(name = "jdbcTemplate")
public JdbcTemplate createJdbcTemplate(DataSource dataSource){
return new JdbcTemplate(dataSource);
}
@Bean(name = "dataSource")
public DataSource createDataSource(){
DriverManagerDataSource ds = new DriverManagerDataSource();
ds.setDriverClassName(driverClass);
ds.setUrl(url);
ds.setUsername(username);
ds.setPassword(password);
return ds;
}
}
- 创建事务配置类
public class TransactionConfig {
@Bean(name = "transactionManager")
public PlatformTransactionManager creatTransactionManager(DataSource dataSource){
return new DataSourceTransactionManager(dataSource);
}
}
- 测试方法
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = SpringConfiguration.class)
public class AccountServiceTest {
@Autowired
private AccountService accountService;
@Test
public void testFindAllUsers(){
accountService.transfer("张三","李四",-800);
Account user1 = accountService.findAccountById(1);
Account user2 = accountService.findAccountById(2);
System.out.printf(user1.toString());
System.out.printf(user2.toString());
}
}