以下这种写法对于我来说不行,但我们老师就是这样写的
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper SYSTEM "http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd" PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN">
<mapper namespace="...">
</mapper>
下面是我在网上看到的,实验后可行
<?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">