HashMap泛型程式設計

　　基於Java HashMap的泛型程式設計，常用的代碼形式如下(開發中遇到的一個Case)：

        //HashMap的建立和值添加
　　　　 HashMap<String, String> hashMap = new HashMap<String, String>();        hashMap.put("appName", "IPAD APP");        hashMap.put("appVer", "2.0");        hashMap.put("cmd","CV_Services.GetIndustryNews('consumer discretionary','en',0,10,'','XSHG,XSHE')");        hashMap.put("alg", "alg");        hashMap.put("appID", "device02154698");
　　　　 //泛型HashMap的遍曆        StringBuffer urlBuffer = new StringBuffer();        Iterator<Entry<String, String>> iterator = hashMap.entrySet().iterator();        while (iterator.hasNext()) {            Entry<String, String> entry = iterator.next();            urlBuffer.append(entry.getKey());            urlBuffer.append("&");            urlBuffer.append(entry.getValue());            urlBuffer.append("&;");        }                String url="";        try {            url=URLEncoder.encode(urlBuffer.toString(), "UTF-8");　　//URL編碼        } catch (UnsupportedEncodingException e) {            e.printStackTrace();        }                System.out.println(url);