如何在java中使用DOM解析器在XML文件中聲明doctype，xml版本和編碼？

Question

對不起，我不知道如何嘗試做這樣的事情。

public void writeXML(String tableName) { 
    try { 
     DocumentBuilderFactory docFactory = DocumentBuilderFactory 
       .newInstance(); 
     DocumentBuilder docBuilder = docFactory.newDocumentBuilder(); 

     // root elements 
     Document doc = docBuilder.newDocument(); 
     Element rootElement = doc.createElement(tableName); 
     doc.appendChild(rootElement); 

     for(Map m: rows){ 
      Element parent = doc.createElement((String) m.get("ownerNode")); 
      rootElement.appendChild(parent); 
      for(String s: colNames){ 
       String key = (String) m.get(s); 
       System.out.println(key); 
       Element innerNode = doc.createElement(s); 
       innerNode.appendChild(doc.createTextNode((String) m.get(s))); 
       parent.appendChild(innerNode); 
      } 
     } 



     // write the content into xml file 
     TransformerFactory transformerFactory = TransformerFactory 
       .newInstance(); 
     Transformer transformer = transformerFactory.newTransformer(); 
     DOMSource source = new DOMSource(doc); 
     StreamResult result = new StreamResult(new File(tableName + ".xml")); 

     // Output to console for testing 
     // StreamResult result = new StreamResult(System.out); 

     transformer.transform(source, result); 

     System.out.println("File saved!"); 

    } catch (ParserConfigurationException pce) { 
    } catch (TransformerException tfe) { 
    } 

} 

這是我的代碼編寫XML的身體所以將不勝感激，如果任何人可以幫助我補充XML版本，編碼，文檔類型和DTD引用與DOM解析器

Answer 1

代碼顯示默認行爲和方式的變革是：

String inputXml = "<root><value>Test</value></root>"; 

// Build DOM tree for input XML 
DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance(); 
DocumentBuilder domBuilder = domFactory.newDocumentBuilder(); 
Document document = domBuilder.parse(new InputSource(new StringReader(inputXml))); 

// Print DOM XML using default settings 
TransformerFactory transformerFactory = TransformerFactory.newInstance(); 
Transformer transformer = transformerFactory.newTransformer(); 
transformer.transform(new DOMSource(document), new StreamResult(System.out)); 

System.out.println(); System.out.println(); 

// Print DOM XML using specific settings 
document.setXmlVersion("1.1"); 
transformer.setOutputProperty(OutputKeys.ENCODING, "windows-1252"); 
transformer.setOutputProperty(OutputKeys.DOCTYPE_PUBLIC, "ROOT-VALUE"); 
transformer.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM, "RootValue.dtd"); 
transformer.transform(new DOMSource(document), new StreamResult(System.out)); 

輸出（使用Java 1.8.0_51）

<?xml version="1.0" encoding="UTF-8" standalone="no"?><root><value>Test</value></root> 

<?xml version="1.1" encoding="windows-1252" standalone="no"?><!DOCTYPE root PUBLIC "ROOT-VALUE" "RootValue.dtd"> 
<root><value>Test</value></root>