为什么DOM库中删除逃出特殊字符？

问题描述

我在XML此内容：

 ＆LT;地方＆GT;
   ＆LT;＆地名GT; @＃$％＆放大器; * / _'（） -  +;！？＆LT; /地名＆GT;
＆LT; /位与GT;
 

这是正确的，当我查看网页源代码

 ＆LT;地方＆GT;
    ＆LT;＆地名GT; @＃$％＆放大器;放大器; * / _＆安培; QUOT;！？（） -  +;＆LT; /地名＆GT;
＆LT; /位
 

我用org.w3c.dom.Document中，org.w3c.dom.Element中，...获取内容地名。问题是DOM库中删除转义特殊字符。它显示了！@＃$％Android中logcat中。为什么？如何解决呢？

这是我的code的一部分，我使用节点:: getNodeValue摆脱以上​​的XML值：

 公共静态文档getDocument（最后弦乐XML）{
        文档DOC = NULL;
        最终的DocumentBuilderFactory DBF = DocumentBuilderFactory.newInstance（）;
            尝试{
            最终的DocumentBuilder DB = dbf.newDocumentBuilder（）;
            最后的InputSource是=新的InputSource（）;
            is.setCharacterStream（新StringReader（XML））;
            DOC = db.parse（是）;            }赶上（最终的ParserConfigurationException E）{
                的System.out.println（XML解析错误：+ e.getMessage（））;
                返回null;
            }赶上（最终的SAXException E）{
                的System.out.println（错的XML文件的结构：+ e.getMessage（））;
                返回null;
            }赶上（最终IOException异常五）{
                的System.out.println（I / O exeption：+ e.getMessage（））;
                返回null;
            }
            返回文档;
    }    私人静态字符串请求（）{
        串线= NULL;
        尝试{
            最后DefaultHttpClient的HttpClient =新DefaultHttpClient（）;
            最终HTTPGET HTTPGET =新HTTPGET（http://api-url.com）;
            最终的Htt presponse HTT presponse = httpClient.execute（HTTPGET）;
            最后HttpEntity httpEntity = HTT presponse.getEntity（）;
            行= EntityUtils.toString（httpEntity）;        }赶上（最终UnsupportedEncodingException五）{
            行=＆lt;结果状态= \\错误\\＆GT;＆LT;味精＆GT;不能连接到服务器16; /味精＆GT;＆LT; /结果＆gt;，
        }赶上（最终MalformedURLException的E）{
            行=＆lt;结果状态= \\错误\\＆GT;＆LT;味精＆GT;不能连接到服务器16; /味精＆GT;＆LT; /结果＆gt;，
        }赶上（最终IOException异常五）{
            行=＆lt;结果状态= \\错误\\＆GT;＆LT;味精＆GT;不能连接到服务器16; /味精＆GT;＆LT; /结果＆gt;，
        }
        回线;
    }
 

解决方案

当你从字符串的文件添加此

  dbf.setCoalescing（真）;
 

其中，DBF是

 的DocumentBuilderFactory DBF = DocumentBuilderFactory.newInstance（）;
 

I have this content in XML:

<place>
   <placeName>!@#$%&*?/_"'()-+;</placeName>
</place>

it's correct when I view Page Source

<place>
    <placeName>!@#$%&amp;*?/_&quot;'()-+;</placeName>
</place

I use org.w3c.dom.Document, org.w3c.dom.Element, ... to get the content "placeName". The problem is the DOM library remove the escaped special characters. It shows "!@#$%" in Android logcat. Why? How to fix it?

This is a part of my code, I use Node::getNodeValue to get values from the above XML:

    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;
    }

解决方案

add this when you get document from string

  dbf.setCoalescing(true); 

where dbf is

 DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

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