xml文件中警告no grammar constraints (DTD or XML schema) referenced in the document

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Eclipse中的xml文件警告no grammar constraints (DTD or XML schema) referenced in the document

根据http://blog.csdn.net/clementad/article/details/46314745

以及https://stackoverflow.com/questions/4551783/no-grammar-constraints-dtd-or-xml-schema-detected-for-the-document高票答案的回答

应该在xml头部加上：

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

另外可在eclipse的窗口选项页面选择关闭验证