实体类
- package com.itheima.domain;
- import java.io.Serializable;
- /**
- * @Author: lijiahao
- * @Description: 账户的实体类
- * @Data: Create in 1:32 2020/2/9
- * @Modified By:
- */
- public class Account implements Serializable {
- private Integer id;
- private String name;
- private Float money;
- @Override
- public String toString() {
- return "account{" +
- "id=" + id +
- ", name='" + name + '\'' +
- ", money=" + money +
- '}';
- }
- public Integer getId() {
- return id;
- }
- public void setId(Integer id) {
- this.id = id;
- }
- public String getName() {
- return name;
- }
- public void setName(String name) {
- this.name = name;
- }
- public Float getMoney() {
- return money;
- }
- public void setMoney(Float money) {
- this.money = money;
- }
- }
Dao 接口
- package com.itheima.Dao;
- import com.itheima.domain.Account;
- /**
- * @Author: lijiahao
- * @Description: 帐户的持久性接口
- * @Data: Create in 2:30 2020/2/9
- * @Modified By:
- */
- public interface IAccountDao {
- /**
- * @Author Lijiahao
- * @Description 根据 id 查帐户
- * @Date 2:31 2020/2/9
- * @Param [id]
- * @return com.itheima.domain.Account
- **/
- Account findAccountById(Integer id);
- // 根据名字查帐户
- Account findAccountByName(String name);
- // 更新帐户
- void updateAccount(Account account);
- }
Dao 具体实现类
- package com.itheima.Dao.impl;
- import com.itheima.Dao.IAccountDao;
- import com.itheima.domain.Account;
- import org.springframework.jdbc.core.BeanPropertyRowMapper;
- import org.springframework.jdbc.core.JdbcTemplate;
- import java.util.List;
- /**
- * @Author: lijiahao
- * @Description:
- * @Data: Create in 2:32 2020/2/9
- * @Modified By:
- */
- public class AccountDaoImpl implements IAccountDao {
- private JdbcTemplate jdbcTemplate;
- public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
- this.jdbcTemplate = jdbcTemplate;
- }
- public Account findAccountById(Integer id) {
- List<Account> accountList = jdbcTemplate.query("select * from account where id = ?", new BeanPropertyRowMapper<Account>(Account.class),id);
- return accountList.isEmpty()?null:accountList.get(0);
- }
- public Account findAccountByName(String name) {
- List<Account> accountList = jdbcTemplate.query("select * from account where name = ?", new BeanPropertyRowMapper<Account>(Account.class),name);
- if(accountList.isEmpty()){
- return null;
- }
- if(accountList.size()>1){
- throw new RuntimeException("结果集不唯一");
- }
- return accountList.get(0);
- }
- public void updateAccount(Account account) {
- jdbcTemplate.update("update account set name=? ,money=? where id = ?", account.getName(),account.getMoney(),account.getId());
- }
- }
测试
- package com.itheima.jdbctemplate;
- import com.itheima.Dao.IAccountDao;
- import com.itheima.domain.Account;
- import org.springframework.context.ApplicationContext;
- import org.springframework.context.support.ClassPathXmlApplicationContext;
- import org.springframework.jdbc.core.BeanPropertyRowMapper;
- import org.springframework.jdbc.core.JdbcTemplate;
- import org.springframework.jdbc.core.RowMapper;
- import java.sql.ResultSet;
- import java.sql.SQLException;
- import java.util.List;
- /**
- * @Author: lijiahao
- * @Description: jdbctemplate 的最基本用法: CRUD
- * @Data: Create in 1:34 2020/2/9
- * @Modified By:
- */
- public class JdbcTemplateDemo4 {
- public static void main(String[] args) {
- //1. 获取容器
- ApplicationContext applicationContext = new ClassPathXmlApplicationContext("bean.xml");
- //2. 获取对象
- IAccountDao accountDao = (IAccountDao) applicationContext.getBean("accountDao");
- Account account = accountDao.findAccountById(1);
- System.out.println(account);
- account.setMoney(10000f);
- accountDao.updateAccount(account);
- }
- }
配置文件
- <?xml version="1.0" encoding="UTF-8"?>
- <beans xmlns="http://www.springframework.org/schema/beans"
- xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
- xsi:schemaLocation="http://www.springframework.org/schema/beans
- https://www.springframework.org/schema/beans/spring-beans.xsd">
- <!-- 配置账户的持久层 -->
- <bean id="accountDao" class="com.itheima.Dao.impl.AccountDaoImpl">
- <property name="jdbcTemplate" ref="jdbcTemplate"></property>
- </bean>
- <!-- 配置 JdbTemplate-->
- <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
- <property name="dataSource" ref="dataSource"></property>
- </bean>
- <!-- 配置数据源 -->
- <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
- <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"></property>
- <property name="url" value="jdbc:mysql://localhost:3306/eesy?serverTimezone=Asia/Shanghai&characterEncoding=utf8&useSSL=false"></property>
- <property name="username" value="root"></property>
- <property name="password" value="123456"></property>
- </bean>
- </beans>
来源: http://www.bubuko.com/infodetail-3412564.html