Spring 事务管理 —— JdbcTemplate用法

1.Spring中得JdbcTemplate
JdbcTemplate的作用：用于和数据库交互的，实现对表的CURD操作

package com.fy.jdbctemplate;

import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DriverManagerDataSource;

/**
 * Jabctemplate得最基础用法
 */
public class JDBCTemplateDemo1 {
    public static void main(String[] args) {
        DriverManagerDataSource ds = new DriverManagerDataSource();
        ds.setDriverClassName("com.mysql.jdbc.Driver");
        ds.setUrl("jdbc:mysql://localhost:3306/account?serverTimezone=UTC");
        ds.setUsername("root");
        ds.setPassword("****");
        JdbcTemplate jdbcTemplate = new JdbcTemplate();
        jdbcTemplate.setDataSource(ds);
        jdbcTemplate.execute("insert into account.demo1 values(1,'aaa',1000)");
    }
}

看见 set new 是不是就联想到IOC 所以我们来用XML配置一下

<?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 http://www.springframework.org/schema/beans/spring-beans.xsd">

    <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/account?serverTimezone=UTC"></property>
        <property name="username" value="root"></property>
        <property name="password" value="991206"></property>
    </bean>
</beans>

package com.fy.jdbctemplate;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DriverManagerDataSource;

/**
 * Jabctemplate得最基础用法
 */
public class JDBCTemplateDemo1 {
    public static void main(String[] args) {
     /*   DriverManagerDataSource ds = new DriverManagerDataSource();
        ds.setDriverClassName("com.mysql.jdbc.Driver");
        ds.setUrl("jdbc:mysql://localhost:3306/account?serverTimezone=UTC");
        ds.setUsername("root");
        ds.setPassword("991206");*/

        //1.获取容器
        ApplicationContext ac = new ClassPathXmlApplicationContext("JDBCBean.xml");
        //2.获取对象
        JdbcTemplate jt = ac.getBean("jdbcTemplate",JdbcTemplate.class);
        //3.执行操作
        jt.execute("insert into account.demo1 values(2,'bbb',2000)");

        /*JdbcTemplate jdbcTemplate = new JdbcTemplate();
        jdbcTemplate.setDataSource(ds);
        jdbcTemplate.execute("insert into account.demo1 values(1,'aaa',1000)");*/
    }
}

查看表：

2.JdbcTemplate的CRUD操作

package com.fy.jdbctemplate;

import com.fy.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.datasource.DriverManagerDataSource;

import java.util.List;

/**
 * Jabctemplate得最基础用法
 */
public class JDBCTemplateDemo1 {
    public static void main(String[] args) {
        //1.获取容器
        ApplicationContext ac = new ClassPathXmlApplicationContext("JDBCBean.xml");
        //2.获取对象
        JdbcTemplate jt = ac.getBean("jdbcTemplate",JdbcTemplate.class);
        //3.执行操作
       //保存
        jt.update("insert into account.demo1 values(?,?,?)",4,"ccc",500);
        //更新
        jt.update("update account.demo1 set name=?,money=? where id=?","aa1",1111,2);
        //删除
        //jt.update("delete from account.demo1 where id=?",1);
        //查询所有
        List<Account> accounts=jt.query("select * from account.demo1 where money > ?",new BeanPropertyRowMapper<Account>(Account.class),1000);
        for (Account account : accounts) {
            System.out.println(account);
        }
        //查询一个
        List<Account> accounts=jt.query("select * from account.demo1 where id = ?",new BeanPropertyRowMapper<Account>(Account.class),4);
        System.out.println(accounts.isEmpty()?"没有内容":accounts.toString());
    }
}

总结：CRUD掌握好逻辑，分析各个作用用法，练习几遍就可以了