create private external DTD through java

Question

如何通过java程序使用DOCTYPE中指定的私有外部DTD创建XML文件，如下所示：

<!DOCTYPE MY1 SYSTEM "my1.dtd">

Answer 1

Assuming you want to use the W3C DOM implementation that is part of the Oracle JRE then use a DOMImplementation https://www.w3.org/TR/DOM-Level-3-Core/core.html#ID-102161490 and do eg

Document doc = domImplementation.createDocument(
  null,
  "MY1",
  domImplementation.createDocumentType("MY1", null, "my1.dtd")
);