为什么DOM库删除转义的特殊字符？

Question

我在这个XML内容：

<place> 
    <placeName>[email protected]#$%&*?/_"'()-+;</placeName> 
</place> 

这是正确的，当我查看网页源代码

<place> 
    <placeName>[email protected]#$%&amp;*?/_&quot;'()-+;</placeName> 
</place 

我用org.w3c.dom.Document中，org.w3c.dom.Element中，.. 。获取内容“placeName”。问题是DOM库删除转义的特殊字符。它在Android logcat中显示“！@＃$％”。为什么？如何解决它？

这是我的代码的一部分，我使用节点:: getNodeValue从上面的XML得到的值：

public static Document getDocument(final String xml) { 
     Document doc = null; 
     final DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); 
      try { 
      final DocumentBuilder db = dbf.newDocumentBuilder(); 
      final InputSource is = new InputSource(); 
      is.setCharacterStream(new StringReader(xml)); 
      doc = db.parse(is); 

      } catch (final ParserConfigurationException e) { 
       System.out.println("XML parse error: " + e.getMessage()); 
       return null; 
      } catch (final SAXException e) { 
       System.out.println("Wrong XML file structure: " + e.getMessage()); 
       return null; 
      } catch (final IOException e) { 
       System.out.println("I/O exeption: " + e.getMessage()); 
       return null; 
      } 
      return doc; 
    } 

    private static String request() { 
     String line = null; 
     try { 
      final DefaultHttpClient httpClient = new DefaultHttpClient(); 
      final HttpGet httpGet = new HttpGet("http://api-url.com"); 
      final HttpResponse httpResponse = httpClient.execute(httpGet); 
      final HttpEntity httpEntity = httpResponse.getEntity(); 
      line = EntityUtils.toString(httpEntity); 

     } catch (final UnsupportedEncodingException e) { 
      line = "<results status=\"error\"><msg>Can't connect to server</msg></results>"; 
     } catch (final MalformedURLException e) { 
      line = "<results status=\"error\"><msg>Can't connect to server</msg></results>"; 
     } catch (final IOException e) { 
      line = "<results status=\"error\"><msg>Can't connect to server</msg></results>"; 
     } 
     return line; 
    } 

Answer 1

添加此当你从字符串

dbf.setCoalescing(true); 

其中DBF文件获取是

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();