java之XML

//转为XML格式
    public static String ArrayToXml(Map<String, String> arr) {
        String xml = "<xml>";
        Iterator<Entry<String, String>> iter = arr.entrySet().iterator();
        while (iter.hasNext()) {
            Entry<String, String> entry = iter.next();
            String key = entry.getKey();
            String val = entry.getValue();
            if (IsNumeric(val)) {
                xml += "<" + key + ">" + val + "</" + key + ">";
            } else
                xml += "<" + key + "><![CDATA[" + val + "]]></" + key + ">";
        }
        xml += "</xml>";
        return xml;
    }

    public static boolean IsNumeric(String str) {
        if (str.matches("\d *")) {
            return true;
        } else {
            return false;
        }
    }

//解析XML
        private Map<String, String> doXMLParse(String xml)  
                throws XmlPullParserException, IOException {  

            InputStream inputStream = new ByteArrayInputStream(xml.getBytes());  

            Map<String, String> map = null;  

            XmlPullParser pullParser = XmlPullParserFactory.newInstance()  
                    .newPullParser();  

            pullParser.setInput(inputStream, "UTF-8");// 为xml设置要解析的xml数据  

            int eventType = pullParser.getEventType();  

            while (eventType != XmlPullParser.END_DOCUMENT) {  
                switch (eventType) {  
                case XmlPullParser.START_DOCUMENT:  
                    map = new HashMap<String, String>();  
                    break;  

                case XmlPullParser.START_TAG:  
                    String key = pullParser.getName();  
                    if (key.equals("xml"))  
                        break;  
                    String value = pullParser.nextText();  
                    map.put(key, value);  
                    break;  
                case XmlPullParser.END_TAG:  
                    break; 
                }  
                eventType = pullParser.next();  
            } 
            return map;  
        }