JdbcTemplate

1       JdbcTemplate

l  spring 提供用于操作JDBC工具类，类似：DBUtils。

l  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

 

1.1.3   javabean

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

 

1.2  使用api（了解）

public staticvoid 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>

 

1.4  配置C3P0

<bean id="dataSourceId" class="com.mchange.v2.c3p0.ComboPooledDataSource">         <property name="driverClass" value="com.mysql.jdbc.Driver">property>         <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/ee19_spring_day02">property>         <property name="user" value="root">property>         <property name="password" value="1234">property>     bean>

1.5  使用JdbcDaoSupport

1.5.1   dao层

 

1.5.2   spring配置文件

<bean id="userDaoId" class="com.itheima.e_jdbcdaosupport.UserDao">         <property name="dataSource" ref="dataSourceId">property>     bean>

 

1.5.3   源码分析

1.6  配置properties

1.6.1   properties文件

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

 

1.6.2   spring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>