mybatis浅显认识

Posted 2020-11-29 凉心、惊梦。

mybatis主配置文件：

<?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里:连接那个数据库

<environments default="development">

   <environment id="development">   

   <transactionManager type="JDBC"/>    

  <dataSource type="POOLED">     

   <property name="driver" value="${driver}"/>    

    <property name="url" value="${url}"/> 

       <property name="username" value="${username}"/>  

      <property name="password" value="${password}"/>  

    </dataSource>  

    </environment>

</environments>

//注册映射文件，一般让namespace与接口的权限类名相同后，不写这个映射文件也可以找到

  <mappers> 

   <mapper resource="org/mybatis/example/BlogMapper.xml"/> 

</mappers>

</configuration>

---