SpringMVC-3

它是spring框架中提供的一个对象，是对原始繁琐的Jdbc API对象的简单封装，spring框架为我们提供了很多的操作模板类，例如：操作关系型数据库JdbcTemplate和Hibernate Template，操作nosql数据库的RedistTemplate，操作消息队列的JmsTemplate等等

1、导入spring-jdbc和spring-tx坐标

 
            junit
            junit
            4.13
            test
        
        
        
            org.springframework
            spring-test
            5.0.5.RELEASE
        

2、创建数据库表和实体
3、创建JdbcTemplate对象
4、执行数据库操作

  @Test
    //测试JdbcTemplate开发步骤
    public void test1() throws Exception {
        //创建数据源对象
        ComboPooledDataSource dataSource = new ComboPooledDataSource();
        dataSource.setDriverClass("com.mysql.cj.jdbc.Driver");
        dataSource.setJdbcUrl("jdbc:mysql://localhost:3306/test?serverTimezone=UTC");
        dataSource.setUser("root");
        dataSource.setPassword("root");
        JdbcTemplate jdbcTemplate = new JdbcTemplate();
        //设置数据源对象，知道数据源在哪
        jdbcTemplate.setDataSource(dataSource);
        //执行操作
        int row = jdbcTemplate.update("insert into account values (?,?)", "bob", 5000);
        System.out.println(row);
    }

我们可以将JdbcTemplate的创建权交给Spring，将数据源DataSource的创建权也交给Spring，在Spring容器内部将数据源DataSource注入到jdbcTemplate模板对象中，配置如下：

@Test
    public void testSpringJdbcTemplate(){
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
        JdbcTemplate jdbcTemplate = applicationContext.getBean(JdbcTemplate.class);
        jdbcTemplate.update("insert into account values (?,?)","Aclice",5000);
    }

jdbc.driver = com.mysql.cj.jdbc.Driver
jdbc.url = jdbc:mysql://localhost:3306/test?serverTimezone=UTC
jdbc.username = root
jdbc.password = root

 @Test
    public void testSpringJdbcTemplate(){
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
        JdbcTemplate jdbcTemplate = applicationContext.getBean(JdbcTemplate.class);
        jdbcTemplate.update("insert into account values (?,?)","Aclice",5000);
    }

package com.zg.test;


import com.zg.domain.Account;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.util.List;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class JdbcTemplateCRUDTest {

    @Autowired
    private JdbcTemplate jdbcTemplate;

    @Test
    public void testQueryCount(){
        Long count = jdbcTemplate.queryForObject("select count(*) from account", Long.class);
        System.out.println(count);
    }

    @Test
    public void testQueryOne(){
        Account account = jdbcTemplate.queryForObject("select * from account where name=?", new BeanPropertyRowMapper(Account.class), "tom");
        System.out.println(account);
    }

    @Test
    public void testQueryAll(){
        List accountList = jdbcTemplate.query("select * from account", new BeanPropertyRowMapper(Account.class));
        System.out.println(accountList);
    }

    @Test
    public void testUpdate(){
        jdbcTemplate.update("update account set money=? where name=?",10000,"bob");
    }

    @Test
    public void testDelete(){
        jdbcTemplate.update("delete from account where name=?","tom");
    }

}