Spring事务案例准备

旧城等待， 2024-04-03 10:48 79阅读 0赞

案例准备:  
1.导入jar包  
注意版本一致

<dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>4.1.3.Release</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-core</artifactId>
                <version>4.1.3.Release</version>
            </dependency>
    
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-beans</artifactId>
                <version>4.1.3.Release</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context-support</artifactId>
                <version>4.1.3.Release</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-expression</artifactId>
                <version>4.1.3.RELEASE</version>
            </dependency>
    
            
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.37</version>
            </dependency>
            <dependency>
                <groupId>com.mchange</groupId>
                <artifactId>c3p0</artifactId>
                <version>0.9.5.2</version>
            </dependency>
            
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
                <version>4.1.3.RELEASE</version>
            </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-tx</artifactId>
          <version>4.1.3.RELEASE</version>
        </dependency>
    
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-aspects</artifactId>
          <version>4.1.3.RELEASE</version>
        </dependency>
    
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-aop</artifactId>
              <version>4.1.3.RELEASE</version>
          </dependency>

1.  创建数据库  
    在springjdbc库中直接创建表

/*Table structure for table `cardinfo` (
    ` */
    
    CREATE TABLE `cardinfo` (
      `id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
      `username` VARCHAR(20) NOT NULL,
      `money` DECIMAL(10,2) DEFAULT NULL,
      PRIMARY KEY (`id`)
    ) ENGINE=INNODB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;
    
    /*Data for the table `cardinfo` */
    
    INSERT  INTO `cardinfo`(`id`,`username`,`money`) VALUES (1,'Helen','1000.00');
    INSERT  INTO `cardinfo`(`id`,`username`,`money`) VALUES (2,'Tom','1000.00');

1.  创建dao接口

public interface ICardInfoDao {
        /**
         * 加钱方法
         * @param id
         * @param money
         */
         void increaseMoney(int id , float money);
    
        /**
         * 减钱方法
         * @param id
         * @param money
         */
         void decreaseMoney(int id , float money);
    }

1.  创建dao实现类

@Component
    public class CardInfoDao implements ICardInfoDao {
    
        @Autowired
        private JdbcTemplate jdbcTemplate;
    
        public void increaseMoney(int id , float money) {
    
            jdbcTemplate.update("update cardinfo set money = money + ? where id = ? ;",money,id);
    
        }
    
        public void decreaseMoney(int id , float money) {
    
            jdbcTemplate.update("update cardinfo set money = money - ? where id = ? ;",money,id);
        }
    }

1.  创建service接口

public interface ICardInfoService {
    
        //转账业务
        void  transfer(int from , int to , float money);
    
    }

1.  创建service实现类

@Service
    public class CardInfoService implements ICardInfoService {
        @Autowired
        private ICardInfoDao cardInfoDao;
    
        public void transfer(Integer from, Integer to, Double money) {
    
            cardInfoDao.decreaseMoney(from,money);
    
            cardInfoDao.increaseMoney(to,money);
        }
    }

1.  添加ioc配置文件  
    先不处理事务问题

注意xmlns的导入

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
           xmlns:aop="http://www.springframework.org/schema/aop"
           xmlns:tx="http://www.springframework.org/schema/tx"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xmlns:context="http://www.springframework.org/schema/context"
           xsi:schemaLocation="http://www.springframework.org/schema/beans
    	http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
    	http://www.springframework.org/schema/aop
    	http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
    	http://www.springframework.org/schema/tx
    	http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
    	http://www.springframework.org/schema/context
    	http://www.springframework.org/schema/context/spring-context-4.0.xsd">
    
    
    
           <context:component-scan base-package="com.test"/>
           <context:property-placeholder location="db.properties" />
    
           <bean  id="comboPooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
                  p:driverClass="${jdbc.driverClass}"
                  p:jdbcUrl="${jdbc.jdbcUrl}"
                  p:user="${jdbc.user}"
                  p:password="${jdbc.password}"
           />
    
           <bean id="jdbcTemplate"  class="org.springframework.jdbc.core.JdbcTemplate">
                <property name="dataSource" ref="comboPooledDataSource"/>
           </bean>
    
    </beans>

测试代码:

ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
    
        ICardInfoService service = (ICardInfoService) context.getBean("cardInfoService");
    
        service.transfer(1,2,100.0);