mybatis3的mapper文件报Referenced file contains errors

背景：

在springmvc+mybatis+oracle项目中，使用java代码反编译输出的xml报错

错误提示：

The errors below were detected when validating the file "mybatis-3-mapper.dtd" via the file "account-mapper.xml". In most cases these errors can be detected by validating "mybatis-3-mapper.dtd" directly. However it is possible that errors will only occur when mybatis-3-mapper.dtd is validated in the context of account-mapper.xml.

java代码：

少了www.

将

<?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" >

改为

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://www.mybatis.org/dtd/mybatis-3-mapper.dtd" >