一個轉賬案例-Spring聲明式事務全註解開發

xml配置文件

在使用全註解形式去完成轉賬案例之前，我們先看看在使用純xml配置的applicationConfiguration.xml

<bean id="accountDao" class="com.xxx.dao.impl.AccountDaoImpl">
    <property name="jdbcTemplate" ref="jdbcTemplate"/>
</bean>

<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
    <property name="dataSource" ref="dataSource"/>
</bean>

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
    <property name="driverClass" value="com.mysql.jdbc.Driver"/>
    <property name="jdbcUrl" value="jdbc:mysql:///account_db"/>
    <property name="user" value="root"/>
    <property name="password" value="123456"/>
</bean>

<bean id="accountService" class="com.xxx.service.impl.AccountServiceImpl">
    <property name="accountDao" ref="accountDao"/>
</bean>

<!--配置平臺事務管理器 同樣要依賴dataSource-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"/>
</bean>

<!--通知事務的增強-->
<!--propagation 事務傳播行爲
REQUIRED：指定當前方法必需在事務環境中運行，如果當前有事務環境就加入當前正在執行的事務環境，
如果當前沒有事務，就新建一個事務。這是默認值。
isolation 事務隔離級別
DEFAULT：採用數據庫默認隔離級別-->
<tx:advice id="tx" transaction-manager="transactionManager">
    <tx:attributes>
        <tx:method name="transfer" isolation="DEFAULT" propagation="REQUIRED" read-only="false"/>
        <tx:method name="find" isolation="DEFAULT" propagation="REQUIRED" read-only="true"/>
        <tx:method name="*"/>
    </tx:attributes>
</tx:advice>

<!--事務的織入-->
<aop:config proxy-target-class="true">
    <aop:advisor advice-ref="tx" pointcut="execution(* com.xxxservice.impl.*.*(..))"/>
</aop:config>

全註解形式源碼

0. 建表

    CREATE TABLE account(
    	id INT PRIMARY KEY AUTO_INCREMENT,
    	NAME VARCHAR(20),
    	money DECIMAL
    );
   

1. 導入所需座標

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.8.4</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.32</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
    </dependencies>
   

2. AccountDaoImpl.java

    @Repository
    public class AccountDaoImpl implements AccountDao {
    
    @Autowired
    private JdbcTemplate jdbcTemplate;
   
   
    public void out(String outMan, double money) {
        jdbcTemplate.update("update account set money=money-? where name=?",money,outMan);
    }
   
    public void in(String inMan, double money) {
        jdbcTemplate.update("update account set money=money+? where name=?",money,inMan);
    }
   

   }

3. AccountServiceImpl.java

    @Service
    @EnableTransactionManagement
    public class AccountServiceImpl implements AccountService {
    
        @Autowired
        private AccountDao accountDao;
    
        @Transactional(isolation = Isolation.DEFAULT,propagation = Propagation.REQUIRED,readOnly = false)
        public void transfer(String outMan, String inMan, double money) {
            accountDao.out(outMan,money);
    //        int i = 1/0;
            accountDao.in(inMan,money);
        }
    }
   

4. SpringConfiguration.java

    @Configuration
    @ComponentScan("com.xxx")
    @Import(DataSourceConfiguration.class)
    public class SpringConfiguration {
    
    }
   

5. DataSourceConfiguration.java

    @Configuration
    @PropertySource("classpath:jdbc.properties")
    public class DataSourceConfiguration {
    
    
        @Value("${jdbc.driver}")
        private String driverClass;
        @Value("${jdbc.url}")
        private String url;
        @Value("${jdbc.username}")
        private String user;
        @Value("${jdbc.password}")
        private String password;
    
        @Bean
        public DataSource getDataSource() throws PropertyVetoException {
            ComboPooledDataSource dataSource = new ComboPooledDataSource();
            dataSource.setDriverClass(driverClass);
            dataSource.setJdbcUrl(url);
            dataSource.setUser(user);
            dataSource.setPassword(password);
            return dataSource;
        }
    
        @Bean
        public JdbcTemplate getTemplate(DataSource dataSource){
            return new JdbcTemplate(dataSource);
        }
        @Bean
        public DataSourceTransactionManager getDSTM(DataSource dataSource){
            return new DataSourceTransactionManager(dataSource);
        }
    }
   

6. jdbc.properties

    jdbc.driver=com.mysql.jdbc.Driver
    jdbc.url=jdbc:mysql:///account_db
    jdbc.username=root
    jdbc.password=123456
   

7. 測試

    @RunWith(SpringJUnit4ClassRunner.class)
    @ContextConfiguration(classes = SpringConfiguration.class)
    public class AnnoTest {
        @Autowired
        private AccountService accountService;
        @Test
        public void test02(){
            accountService.transfer("tom","lucy",500f);
        }
    }
   

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