mybatis配置文件--未和spring整合前，jdbc

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE configurationPUBLIC "-//mybatis.org//DTD Config 3.0//EN""http://mybatis.org/dtd/mybatis-3-config.dtd"><configuration>  <properties resource="db.properties"></properties><typeAliases><package name="cn.itcast.mybatis.po"/></typeAliases><environments default="development"><environment id="development"><transactionManager type="JDBC" /><dataSource type="POOLED"><property name="driver" value="${jdbc.driver}" /><property name="url" value="${jdbc.url}" /><property name="username" value="${jdbc.username}" /><property name="password" value="${jdbc.password}" /></dataSource></environment></environments><mappers><mapper resource="sqlmap/User.xml"/><package name="cn.itcast.mybatis.mapper"/></mappers></configuration>