Question

我有一个案例，比如获取XML并将XML元素转换为文档对象并获取已经创建的元素值和属性

这是我试图将字符串转换为DOM文档对象

的代码片段

String xmlString = " <r><e>d</e></r>";
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
org.w3c.dom.Document document = builder.parse(new InputSource(new StringReader(xmlString)));    
TransformerFactory transformerFactory = TransformerFactory.newInstance(); 
Transformer transformer = transformerFactory.newTransformer();
DOMSource source = new DOMSource(document);
StreamResult result =  new StreamResult(new StringWriter());
transformer.transform(source, result);
String str1 = result.getWriter().toString();
System.out.println(str1);

但是这种情况仅适用于没有属性的元素

，我们该怎么办？

String xmlString = "<element attribname="value" attribname1="value1"> pcdata</element>"

我们使用双引号作为属性值“value”。编译器显示错误

建议我是否有任何xml编码器和解码器来处理这种情况？

Answer 1

你可以尝试

DocumentBuilder db = DocumentBuilderFactory.newInstance().newDocumentBuilder();
InputSource is = new InputSource();
is.setCharacterStream(new StringReader("<root><node1></node1></root>"));

Document doc = db.parse(is);

参考此http://www.java2s.com/Code/Java/XML/ParseanXMLstringUsingDOMandaStringReader.htm

Answer 2

使用\

转义双引号

String xmlString = "<element attribname=\"value\" attribname1=\"value1\"> pcdata</element>"

或改为使用单引号

String xmlString = "<element attribname='value' attribname1='value1'> pcdata</element>"

Answer 3

     public static void main(String[] args) {
    final String xmlStr = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\n"+
                            "<Emp id=\"1\"><name>Pankaj</name><age>25</age>\n"+
                            "<role>Developer</role><gen>Male</gen></Emp>";
   DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();  
        DocumentBuilder builder;  
        try 
        {  
            builder = factory.newDocumentBuilder();  
            Document doc = builder.parse( new InputSource( new StringReader( xmlStr )) ); 

        } catch (Exception e) {  
            e.printStackTrace();  
        } 
  }

Answer 4

DocumentBuilder db = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document document = db.parse(new ByteArrayInputStream(xmlString.getBytes("UTF-8"))); //remove the parameter UTF-8 if you don't want to specify the Encoding type.

即使XML结构很复杂，这对我也很有用。

请确保您的xmlString对XML有效，请注意转义字符应在前面添加“\”。

主要问题可能不是来自属性。

如何在java中将String转换为DOM Document对象？

4 个答案: