HashMap泛型编程
基于Java HashMap的泛型编程,常用的代码形式如下(开发中遇到的一个Case):
复制代码
//HashMap的创建和值添加
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的遍历
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编码
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
System.out.println(url) |
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