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Spring模拟转账开发

news 来源：原创 2025/5/17 14:16:49

完成转账代码的编写

service

public class AccountServiceImpl implements AccountService {@Autowiredprivate AccountDao accountDao;public void setAccountDao(AccountDao accountDao) {this.accountDao = accountDao;}public void pay(String out, String in, Double money) {accountDao.outMoney(out,money);accountDao.inMoney(in,money);}
}

dao

public class AccountDaoImpl implements AccountDao {@Autowiredprivate JdbcTemplate jdbcTemplate;public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {this.jdbcTemplate = jdbcTemplate;}public void outMoney(String out, double money) {jdbcTemplate.update("update account set money = money - ? where name = ?",money,out);}public void inMoney(String in, double money) {jdbcTemplate.update("update account set money = money + ? where name = ?",money,in);}
}

配置文件

<!--第二种写法:使用提供标签的方式-->
<context:property-placeholder location="classpath:jd.properties"/><!--加载属性的文件（使用开源连接池）-->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"><property name="driverClassName" value="${jdbc.driverClassName}"/><property name="url" value="${jdbc.url}"/><property name="username" value="${jdbc.username}"/><property name="password" value="${jdbc.password}"/>
</bean>
<!--配置jdbc模板-->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"><property name="dataSource" ref="dataSource"/>
</bean>
<!--配置 service-->
<bean id="accountService" class="com.qcby.demo2.AccountServiceImpl"><property name="accountDao" ref="accountDao"/>
</bean>
<!--配置 dao-->
<bean id="accountDao" class="com.qcby.demo2.AccountDaoImpl"><property name="jdbcTemplate" ref="jdbcTemplate" />
</bean>

测试代码

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext.xml")
public class Demo1 {@Autowiredprivate AccountService accountService;@Testpublic void run1(){accountService.pay("熊大","熊二",10.0);}
}

Dao编写的方式（第二种方式）

service

public class AccountServiceImpl implements AccountService {@Autowiredprivate AccountDao accountDao;public void setAccountDao(AccountDao accountDao) {this.accountDao = accountDao;}public void pay(String out, String in, Double money) {accountDao.outMoney(out,money);accountDao.inMoney(in,money);}
}

dao

public class AccountDaoImpl extends JdbcDaoSupport implements AccountDao{//付款public void outMoney(String out, double money) {this.getJdbcTemplate().update("update account set money = money-? where name = ?",money,out);}public void inMoney(String in, double money) {this.getJdbcTemplate().update("update account set money = money + ? where name = ?",money,in);}
}

配置文件编写

<!--第二种写法:使用提供标签的方式-->
<context:property-placeholder location="classpath:jd.properties"/><!--加载属性的文件（使用开源连接池）-->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"><property name="driverClassName" value="${jdbc.driverClassName}"/><property name="url" value="${jdbc.url}"/><property name="username" value="${jdbc.username}"/><property name="password" value="${jdbc.password}"/>
</bean>
<!--配置 service-->
<bean id="accountService" class="com.qcby.demo2.AccountServiceImpl"><property name="accountDao" ref="accountDao"/>
</bean>
<!--配置 dao-->
<bean id="accountDao" class="com.qcby.demo2.AccountDaoImpl"><property name="dataSource" ref="dataSource" />
</bean>

测试方法

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext.xml")
public class Demo1 {@Autowiredprivate AccountService accountService;@Testpublic void run1(){accountService.pay("熊大","熊二",10.0);}
}