xml中标签含义

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC" />
            <!-- 配置数据库连接信息 -->
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver" />
                <property name="url" value="jdbc:mysql://localhost:3306/frame" />
                <property name="username" value="root" />
                <property name="password" value="111111" />
            </dataSource>
        </environment>
    </environments>
    
       <mappers>
           <!-- 注册userMapper.xml文件， 
        userMapper.xml位于me.gacl.mapping这个包下，所以resource写成me/gacl/mapping/userMapper.xml-->
        <mapper resource="me/gacl/domain/userMapper.xml"/>
       </mappers> 
   
</configuration>

<？xml version =“1.0”encoding =“UTF-8”？>
<！DOCTYPE configuration PUBLIC“ - // mybatis.org //DTD Config 3.0 // EN”“http://mybatis.org/dtd/mybatis-3-config.dtd”>
<配置>
   <环境 default =“development”>
      <环境 id =“development”>
          <事务管理器 type =“JDBC”/>
          <！ - 配置数据库连接信息 - >
          <数据源 type =“POOLED”>
             <属性 name =“driver” value =“com.mysql.jdbc.Driver”/>
             <属性 name =“url” value =“jdbc：mysql：//localhost：3306/frame”/>
             <属性 name =“username” value =“root”/>
             <属性 name =“password” value =“111111”/>
          </数据源>
      </环境>
   </环境>
    
   <映射器>
    <！ - 注册userMapper.xml文件，userMapper.xml位于me.gacl.mapping这个包下，所以资源写成我/的GaCl/制图/ userMapper.xml - >
        
         <mapper resource =“me/gacl/domain/userMapper.xml”/>
   </映射器>
   
</配置>