解析Json和xml数据

解析xml数据

private void parseXMLWithPull(String xmlData) {
    try {
        XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
        XmlPullParser xmlPullParser = factory.newPullParser();
        xmlPullParser.setInput(new StringReader(xmlData));
        int eventType = xmlPullParser.getEventType();
        String id = "";
        String name = "";
        String version = "";
        while (eventType != XmlPullParser.END_DOCUMENT) {
            String nodeName = xmlPullParser.getName();
            switch (eventType) {
                // 开始解析某个结点
case XmlPullParser.START_TAG: {
                    if ("id".equals(nodeName)) {
                        id = xmlPullParser.nextText();
                    } else if ("name".equals(nodeName)) {
                        name = xmlPullParser.nextText();
                    } else if ("version".equals(nodeName)) {
                        version = xmlPullParser.nextText();
                    }
                    break;
                }
                // 完成解析某个结点
case XmlPullParser.END_TAG: {
                    if ("app".equals(nodeName)) {
                        Log.d("MainActivity", "id is " + id);
                        Log.d("MainActivity", "name is " + name);
                        Log.d("MainActivity", "version is " + version);
                    }
                    break;
                }
                default:
                    break;
            }
            eventType = xmlPullParser.next();
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

private void parseXMLWithSAX(String xmlData) {
    try {
        SAXParserFactory factory = SAXParserFactory.newInstance();
        XMLReader xmlReader = factory.newSAXParser().getXMLReader();
        ContentHandler handler = new ContentHandler();
        // 将ContentHandler的实例设置到XMLReader中
xmlReader.setContentHandler(handler);
        // 开始执行解析
xmlReader.parse(new InputSource(new StringReader(xmlData)));
    } catch (Exception e) {
        e.printStackTrace();
    }
}

 

解析Json数据

private void parseJSONWithJSONObject(String jsonData) {
    try {
        JSONArray jsonArray = new JSONArray(jsonData);
        for (int i = 0; i < jsonArray.length(); i++) {
            JSONObject jsonObject = jsonArray.getJSONObject(i);
            String id = jsonObject.getString("id");
            String name = jsonObject.getString("name");
            String version = jsonObject.getString("version");
            Log.d("MainActivity", "id is " + id);
            Log.d("MainActivity", "name is " + name);
            Log.d("MainActivity", "version is " + version);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}


//使用Gson之前要先创建一个JavaBean
private void parseJSONWithGSON(String jsonData) {
    Gson gson = new Gson();
    List<App> appList = gson.fromJson(jsonData, new TypeToken<List<App>>() {}.getType());
    for (App app : appList) {
        Log.d("MainActivity", "id is " + app.getId());
        Log.d("MainActivity", "name is " + app.getName());
        Log.d("MainActivity", "version is " + app.getVersion());
    }
}