原始jdk javax.xml.parsers xml转化总结

以前遇到xml转化问题是一般直接使用了dom4j和jdom,今天尝试了一下使用普通的javax.xml,总结一下

1,xml转化为String

public static String getTextFromDom(Document doc) {

        TransformerFactory tfFactory = TransformerFactory.newInstance();

        Transformer tf;

        ByteArrayOutputStream bos = null;

        try {

            tf = tfFactory.newTransformer();

            tf.setOutputProperty("encoding", "UTF-8");

            bos = new ByteArrayOutputStream();

            tf.transform(new DOMSource(doc), new StreamResult(bos));

        } catch (Exception e) {

            e.printStackTrace();

        }

        return bos.toString();

    }

2,符合格式的String 转化为document

public static Document getDocument(String xml) {

        Document document = null;

        try {

            StringReader stringReader = new StringReader(xml);

            InputSource inputSource = new InputSource(stringReader);

            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

            DocumentBuilder dBuilder = dbf.newDocumentBuilder();

            document = dBuilder.parse(inputSource);

        } catch (Exception e) {

            e.printStackTrace();

        }

        return document;

    }

3,将xml转化为map(子类如果仍有子类,仍以map形式存,map取值是需判断值是否也是map)

public static Map<String, Object> getMapByDocument(Node node) {

        if (node.hasChildNodes() && node.getFirstChild().getNodeType()==Document.ELEMENT_NODE) {

            Map<String, Object> result = new HashMap<String, Object>();

            NodeList nl = node.getChildNodes();

            for (int i = 0; i < nl.getLength(); i++) {

                Node childNode = nl.item(i);

                if(childNode.hasChildNodes() && childNode.getFirstChild().getNodeType()==Document.ELEMENT_NODE){

                    Map<String, Object> childrenMap = getMapByDocument(childNode);

                    result.put(childNode.getNodeName(), childrenMap);

                }else {

                    result.put(childNode.getNodeName(), childNode.getTextContent());

                }

            }

            return result;

        } 

        return null;

    }

结果查看

public static void main(String[] args) {

        

        String xmlStr = "<body>" +

                "<ResultCode>6202</ResultCode>" +

                "<ResultDesc><aa>fffffffffff</aa></ResultDesc>" +

                "<SmsIds/><RemainCount>0</RemainCount>" +

                "</body>";

        Document doc = getDocument(xmlStr);

        System.out.println(getTextFromDom(doc));

        Map<String, Object> respMap = getMapByDocument(doc);

        Object result = respMap.get("body"); 

        if (result instanceof java.util.Map) {

            Map new_name = (Map) result;

            if (new_name.get("ResultDesc") instanceof java.util.Map) {

                Map ResultDesc = (Map) new_name.get("ResultDesc");

                System.out.println(ResultDesc.get("aa"));

            }

            System.out.println(new_name.get("ResultCode"));

        }

        for (Object obj : respMap.values()) {

            System.out.println(obj);

        }

    }

结果如下

<?xml version="1.0" encoding="UTF-8" standalone="no"?><body><ResultCode>6202</ResultCode><ResultDesc><aa>fffffffffff</aa></ResultDesc><SmsIds/><RemainCount>0</RemainCount></body>

fffffffffff

6202

{ResultDesc={aa=fffffffffff}, ResultCode=6202, SmsIds=, RemainCount=0}

 

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