MyBatis 4 ways to register Mapper

<?xml version= "1.0" encoding= "UTF-8" standalone= "no"?>
<! DOCTYPE configuration Public "-//mybatis.org//dtd Config 3.0//en" "Http://mybatis.org/dtd/mybatis-3-config.dtd" >
<configuration>
	<mappers>  
		<!--The package element will register all mapper interfaces below the specified packet-  
		< Package name= "Com.tiantian.mybatis.mapperinterface"/>  
		<!-- The resource property of the Mapper element allows you to specify a mapper.xml file that is relative to the classpath and  
		<mapper resource= "com/tiantian/mybatis/mapper/ Usermapper.xml "/>  
		<!--The URL property of the mapper element allows you to specify a mapper.xml file through a URL request--  
		<mapper url=" File:///E :/usermapper.xml "/>  
		<!--through the class attribute of the mapper element you can specify a mapper interface to register--  
		<mapper class=" Com.tiantian.mybatis.mapperinterface.UserMapper "/>  
	</mappers>  
</configuration>