Question

我在XML中有这个内容：

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

当我查看页面源

时它是正确的

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

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

这是我的代码的一部分，我使用Node :: getNodeValue从上面的XML中获取值：

    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

从字符串

获取文档时添加此项

  dbf.setCoalescing(true);

其中dbf是

 DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

为什么DOM库会删除转义的特殊字符？

1 个答案: