初学mybatis，遇到些问题

报错是Attribute "resource" must be declared for element type "mapper”

代码：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">

楼主有解决这个问题吗，最近也遇到了，解决了麻烦告知下，谢谢