解析还是打印？

这是基于我对so的微小研究。

解析：

对于inputstream的xml解析，可以执行以下操作：

// the SAX way:
XMLReader myReader = XMLReaderFactory.createXMLReader();
myReader.setContentHandler(handler);
myReader.parse(new InputSource(new URL(url).openStream()));

// or if you prefer DOM:
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(new URL(url).openStream());

打印：

如果要将xml直接打印到屏幕上，可以使用 TransformerFactory ```
URL url = new URL(urlString);
URLConnection conn = url.openConnection();

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder.parse(conn.getInputStream());

TransformerFactory factory = TransformerFactory.newInstance();
Transformer xform = factory.newTransformer();

// that’s the default xform; use a stylesheet to get a real one
xform.transform(new DOMSource(doc), new StreamResult(System.out));

以下是我用于此类任务的代码：

public void readFromUrl(String inurl){
try {
    URL url = new URL(inurl);

    BufferedReader in = new BufferedReader(
        new InputStreamReader(url.openStream()));

        String inputLine;
        while ((inputLine = in.readLine()) != null) {
            // HERE YOU CAN PRINT/LOG/SAVE THE LINE.
        }
        in.close();
} catch (Exception e) {
    e.printStackTrace();
}
}

附笔
可以使用stringbuilder构建包含xml的字符串。