Spring的JdbcTemplate

￡神魔★判官ぃ 2022-05-17 12:15 231阅读 0赞

**JdbcTemplate**  
spring 提供用于操作JDBC工具类，类似：DBUtils。  
依赖 连接池DataSource （数据源）

**1.1环境搭建**

**1.1.1创建表**

create database ee19_spring_day02;
    use ee19_spring_day02;
    create table t_user( id int primary key auto_increment, username varchar(50), password varchar(32) );
    
    insert into t_user(username,password) values('jack','1234');
    insert into t_user(username,password) values('rose','5678');

**1.1.2导入jar包**  
![这里写图片描述][70]  
**1.1.3javabean**

package com.itheima.domain;
    
    public class User {
    
        private Integer id;
        private String username;
        private String password;

**1.2使用api（了解）**

public static void main(String[] args) {
    
            //1 创建数据源（连接池） dbcp
            BasicDataSource dataSource = new BasicDataSource();
            // * 基本4项
            dataSource.setDriverClassName("com.mysql.jdbc.Driver");
            dataSource.setUrl("jdbc:mysql://localhost:3306/ee19_spring_day02");
            dataSource.setUsername("root");
            dataSource.setPassword("1234");
    
    
            //2 创建模板
            JdbcTemplate jdbcTemplate = new JdbcTemplate();
            jdbcTemplate.setDataSource(dataSource);
    
    
            //3 通过api操作
            jdbcTemplate.update("insert into t_user(username,password) values(?,?);", "tom","998");
    
        }

**1.3配置DBCP**

<bean id="dataSourceId" class="org.apache.commons.dbcp.BasicDataSource">
            <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
            <property name="url" value="jdbc:mysql://localhost:3306/ee19_spring_day02"></property>
            <property name="username" value="root"></property>
            <property name="password" value="1234"></property>
        </bean>
        
        <bean id="jdbcTemplateId" class="org.springframework.jdbc.core.JdbcTemplate">
            <property name="dataSource" ref="dataSourceId"></property>
        </bean>
    
        
        <bean id="userDaoId" class="com.itheima.c_dbcp.UserDao">
            <property name="jdbcTemplate" ref="jdbcTemplateId"></property>
        </bean>

**1.5使用JdbcDaoSupport**

**1.5.1dao层**  
![这里写图片描述][70 1]  
**15.3源码分析**  
![这里写图片描述][70 2]  
**1.6配置properties**

**1.6.1properties文件**

jdbc.driverClass=com.mysql.jdbc.Driver
    jdbc.jdbcUrl=jdbc:mysql://localhost:3306/ee19_spring_day02
    jdbc.user=root
    jdbc.password=1234

**1.6.2spring配置**

<context:property-placeholder location="classpath:com/itheima/f_properties/jdbcInfo.properties"/>
    
        
        <bean id="dataSourceId" class="com.mchange.v2.c3p0.ComboPooledDataSource">
            <property name="driverClass" value="${jdbc.driverClass}"></property>
            <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
            <property name="user" value="${jdbc.user}"></property>
            <property name="password" value="${jdbc.password}"></property>
        </bean>

**over~~~**

[70]: /images/20220517/d5d274e27c3945f3b554b39004740572.png
[70 1]: /images/20220517/1909d22c7448446d9f1a50e99a364b56.png
[70 2]: /images/20220517/2898996598434b80a35e9c9688193a24.png