準備:jdbc.properties

第一步:連線資料庫

<context:property-placeholder location="jdbc.properties"/>
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>

第二步:書寫Dao層和Service層

//Dao層

public class AccountDao extends JdbcDaoSupport {
    public AccountDao() {
    }

    //出錢
    public void out(String name,double monney){
        String sql="update account set monney=monney-? where name=? ";
        Object[] paramarr={monney,name};
        this.getJdbcTemplate().update(sql,paramarr);
    }
    //金錢
    public void in(String name,double monney){
        String sql="update account set monney=monney+? where name=? ";
        Object[] paramarr={monney,name};
        this.getJdbcTemplate().update(sql,paramarr);
    }
}

//service層

public class AccountService {

    private AccountDao accountDao;
    public void setAccountDao(AccountDao accountDao){
        this.accountDao=accountDao;
    }

    @Transactional
    public void transaction(String name1,String name2,Double monney){
        accountDao.out(name1,monney);
        int num=1/0;
        accountDao.in(name2,monney);
    }
}

第三步:配置Dao層和Service層

 <!--配置dao層-->
    <bean id="accountDao" class="it.heima.dao_annotation.AccountDao">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--配置service層-->
    <bean id="accountService" class="it.heima.service_annotation.AccountService">
        <property name="accountDao" ref="accountDao"/>
    </bean>

第四步:開啟事務註釋

<!--開啟事務註釋-->
    <tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven>
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

第五步:測試