JdbcTemplate(概念和准备)

向日葵花圆又圆

已于 2022-04-20 16:27:29 修改

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文章标签： spring

于 2022-04-20 16:27:04 首次发布

本文链接：https://blog.youkuaiyun.com/m0_63734254/article/details/124298373

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1.什么是JdbcTemplate

（1）Spring框架对JDBC进行封装，使用JdbcTemplate方便实现对数据库操作

2.准备工作

（1）引入相关jar包

（）@（2）在spring中配置数据库的连接池（）

<?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">

<!--  数据库连接池-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close">
        <property name="url" value="jdbc:mysql://userdb"/>
        <property name="username" value="root"/>
        <property name="password" value="root"/>
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>

    </bean>

</beans>

（3）配置jdbcTemplate对象，注入DataSource

<?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">

<!--  数据库连接池-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close">
        <property name="url" value="jdbc:mysql://userdb"/>
        <property name="username" value="root"/>
        <property name="password" value="root"/>
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>


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


</beans>

（4）创建service类创建dao类，在dao注入jdbcTemplate对象

配置文件：

<context:component-scan base-package="com.atguigu"></context:component-scan>

Service

package com.atguigu.spring5.service;

import com.atguigu.spring5.dao.BookDao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class BookService {
    //注入dao
    @Autowired
    private BookDao bookDao;

}

Dao

package com.atguigu.spring5.dao;

public interface BookDao  {
    

}

package com.atguigu.spring5.dao;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;

@Repository
public class BookDaoImpl implements BookDao {

    //注入JdbcTemplate
    @Autowired
    private JdbcTemplate jdbcTemplate;
}