这个bug怎么改？第一次用Idea和第一次写boot

UnsatisfiedDependencyException: Error creating bean with name 'areaDao' defined in file [C:\Users\37991\IdeaProjects\test\mvndemo\target\classes\com\mvn\mvndemo\dao\AreaDao.class]: Unsatisfied dependency expressed through bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [com/mvn/mvndemo/config/dao/SessionFactoryConfiguration.class]: Invocation of init method failed; nested exception is org.apache.ibatis.builder.BuilderException: Error creating document instance.  Cause: org.xml.sax.SAXParseException; lineNumber: 22; columnNumber: 6; 不允许有匹配 "[xX][mM][lL]" 的处理指令目标。

 Error creating bean with name 'areaDao' defined in file [C:\Users\37991\IdeaProjects\test\mvndemo\target\classes\com\mvn\mvndemo\dao\AreaDao.class]: Unsatisfied dependency expressed through bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [com/mvn/mvndemo/config/dao/SessionFactoryConfiguration.class]: Invocation of init method failed; nested exception is org.apache.ibatis.builder.BuilderException: Error creating document instance.  Cause: org.xml.sax.SAXParseException; lineNumber: 22; columnNumber: 6; 不允许有匹配 "[xX][mM][lL]" 的处理指令目标。