JdbcTemplate增删改

（1）Accountsdao层

//删除单个账户
int delaccount(Integer accountid);
//添加单个用户
int addaccount(Accounts accounts);
//修改单个用户
int updateaccount(Accounts accounts);

（2）AccountdaoImpl实现类

@Repository
public class AccountDaoImpl implements AccountsDao {
    @Resource
    private JdbcTemplate jdbcTemplate;
 
    @Override
    public int delaccount(Integer accountid) {

        String sql="delete from accounts where accountid=5";
        int count = jdbcTemplate.update(sql);
        return count;
    }

    @Override
    public int addaccount(Accounts accounts) {
        String sql="INSERT INTO accounts(accountname,balance) VALUES (?,?)";
        int add = jdbcTemplate.update(sql,accounts.getAccountname(),accounts.getBalance());
        return add;
    }

    @Override
    public int updateaccount(Accounts accounts) {
        String sql="update accounts set accountname=?,balance=? where accountid=?";
        int update = jdbcTemplate.update(sql, accounts.getAccountname(), accounts.getBalance(),accounts.getAccountid());
        return update;
    }
}

（3）AccountService层

//删除单个账户
int delaccount(Integer accountid);
//添加单个用户
int addaccount(Accounts accounts);
//修改单个用户
int updateaccount(Accounts accounts);

（4）AccountServiceImpl实现类

@Service("accountsServiceImpl")
public class AccountsServiceImpl implements AccountsService{
    //使用Spring IOC 将AccountDao对象注入
    @Autowired
    AccountsDao dao;


    @Override
    public int delaccount(Integer accountid) {
        return dao.delaccount(accountid);
    }

    @Override
    public int addaccount(Accounts accounts) {
        return dao.addaccount(accounts);
    }

    @Override
    public int updateaccount(Accounts accounts) {
        return dao.updateaccount(accounts);
    }


    public AccountsDao getDao() {
        return dao;
    }

    public void setDao(AccountsDao dao) {
        this.dao = dao;
    }
}

（5）applicationContext.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:p="http://www.springframework.org/schema/p"
       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/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">

    <!--1.配置数据源   spring内置的数据源-->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="${jdbc.driver}"></property>
        <property name="url" value="${jdbc.url}"></property>
        <property name="username" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>

    <!--2.引入属性文件-->
    <context:property-placeholder location="jdbc.properties"></context:property-placeholder>

    <!--3.构建jdbcTemplate-->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!--扫描注解：包扫描器-->
    <context:component-scan base-package="cn.spring"></context:component-scan>

    <!--开启AOP注解支持-->
    <aop:aspectj-autoproxy></aop:aspectj-autoproxy>
</beans>

（6）测试类

@Test
public void delaccountTest(){
    ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
    AccountsService accountsService=(AccountsService) context.getBean(AccountsService.class);
    int delaccount = accountsService.delaccount(5);
    if (delaccount>0){
        System.out.println("删除成功！");
    }
}

@Test
public void addaccountTest(){
    ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
    AccountsService accountsServiceImpl = (AccountsService)context.getBean("accountsServiceImpl");
    Accounts accounts=new Accounts();
    accounts.setAccountname("小丫头");
    accounts.setBalance(500);
    int addaccount = accountsServiceImpl.addaccount(accounts);
    if (addaccount>0){
        System.out.println("添加成功！");
    }
}

@Test
public void updateaccountTest(){
    ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
    AccountsService accountsServiceImpl = (AccountsService)context.getBean("accountsServiceImpl");
    Accounts accounts=new Accounts();
    accounts.setAccountname("丫头片子");
    accounts.setBalance(1200);
    accounts.setAccountid(9);
    int updateaccount = accountsServiceImpl.updateaccount(accounts);
    if (updateaccount>0){
        System.out.println("修改成功！");
    }