今天在玩mybatis的时候，遇到这个奇葩问题。
最后发现，原因是 dtd文件配置错误了。错把Mapper的直接copy过来
把DOCTYPE mapper改成configuration，Mapper改成config即可
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<configuration> <typeAliases>
<typeAlias alias="Jit" type="springmvcexample.demo.model.Jit"/>
</typeAliases> <!-- 注册对象的空间命名 -->
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://10.199.160.35:3306/vop_data_stg"/>
<property name="username" value="root"/>
<property name="password" value="test"/>
</dataSource>
</environment>
</environments> <mappers>
<mapper resource="jitMapper.xml" />
</mappers>
</configuration>