Spring JdbcTemplate

最新推荐文章于 2025-06-21 15:09:14 发布

茹果_遇见T

最新推荐文章于 2025-06-21 15:09:14 发布

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本文介绍了一个使用Spring框架中JdbcTemplate进行数据库操作的简单示例。通过XML配置文件设置数据源和JdbcTemplate，演示了插入、更新、删除和查询等基本操作。

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简单的JdbcTemplate程序，先看bean.xml配置：

<?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:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                           http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://www.springframework.org/schema/context
                           http://www.springframework.org/schema/context/spring-context.xsd
                           http://www.springframework.org/schema/aop
                           http://www.springframework.org/schema/aop/spring-aop.xsd">

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

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
        <property name="url" value="jdbc:mysql://localhost:3306/demo"></property>
        <property name="username" value="root"></property>
        <property name="password" value="1234"></property>
    </bean>
</beans>

执行类：

public class JdbcTemplateDemo1 {

    public static void main(String[] args) {
        //1、获取容器
        ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
        //2、跟id获取bean对象
        JdbcTemplate jt = (JdbcTemplate) ac.getBean("jdbcTemplate");
        //3、执行操作
        jt.execute("insert into account(name,money) values('ddd', 1234)");
        //保存
        jt.update("insert into account(name, money) values (?,?)", "fff", 3456);
        //更新
        jt.update("update account set money = ? where id = ?", 3567, 3);
        //删除
        jt.update("delete from account where id = ?", 5);
        //查询所有
//        List<Account> accounts = jt.query("select * from account where money > ?",
//                new BeanPropertyRowMapper<Account>(Account.class), 10000);
//        for(Account account : accounts) {
//            account.toString();
//        }
        //查询一个
//        List<Account> accounts = jt.query("select * from account where money = ?",
//            new BeanPropertyRowMapper<Account>(Account.class), 10000);
        //查询返回一行一列：聚合函数的使用
        Integer count = jt.queryForObject("select count(*) from account where money > ? ", Integer.class, 1000)

    }
}