微信公衆號回調接口HttpServletRequest 操作

微信公衆號回調接口，解析參數

1、獲取request 參數

Map<?, ?>  parameterMap = request.getParameterMap();

2、map 轉json

JSONObject requestParam = JSONObject.fromObject((parameterMap==null||parameterMap.isEmpty())?"{}":parameterMap);

3、讀取request

private String parse(HttpServletRequest request) {
        BufferedReader buf = null;
        try {
            buf = new BufferedReader(new InputStreamReader(request.getInputStream(),"UTF-8"));
            StringBuilder sb = new StringBuilder();
            String line = null;
            while (null != (line = buf.readLine())) {
                sb.append(line);
            }
            if (sb.length() > 0) {
                return sb.toString();
            }
        } catch (Exception e) {
            log.error("weimob parse request error!", e);
            return null;
        } finally {
            try {
                buf.close();
            } catch (Exception e) {
                log.error("weimob parse request error!", e);
            }
        }
        return null;
    }

4、解析讀取request內容，將xml格式的字符串解析成map(針對子節點中沒有重複的節點名)

xmlDoc爲parse方法讀取到的request內容，解析爲map

 private Map<String, String> parseXMl(String xmlDoc) throws Exception {
        if (StringUtils.isBlank(xmlDoc)) {
            return null;
        }
        StringReader xmlString = new StringReader(xmlDoc);
        // 創建新的輸入源SAX 解析器將使用 InputSource 對象來確定如何讀取 XML 輸入
        InputSource source = new InputSource(xmlString);
        // 創建一個新的SAXBuilder
        SAXBuilder saxb = new SAXBuilder();
        // 通過輸入源構造一個Document
        Document doc = saxb.build(source);
        Element root = doc.getRootElement();
        // 得到根元素所有子元素的集合
        List<?> node = root.getChildren();
        Map<String, String> m = new HashMap<String, String>();
        if (node.size() > 0) {
            for (int i = 0; i < node.size(); i++) {
                Element el = (Element) node.get(i);
                m.put(el.getName(), el.getText());
            }
        } else {
            m.put(root.getName(), root.getText());
        }
        return m;
    }

requestInputMap.get(key);獲取參數