Android中使用HttpGet和HttpPost訪問HTTP資源

需求：用戶登陸（name:用戶名，pwd:密碼）

（一）HttpGet :doGet()方法
//doGet():將參數的鍵值對附加在url後面來傳遞

public String getResultForHttpGet(String name,String pwd) throws ClientProtocolException, IOException{
                //服務器  ：服務器項目  ：servlet名稱
                String path="http://192.168.5.21:8080/test/test";
                String uri=path+"?name="+name+"&pwd="+pwd;
                //name:服務器端的用戶名，pwd:服務器端的密碼
                //注意字符串鏈接時不能帶空格

                String result="";

                HttpGet httpGet=new HttpGet(uri);//編者按：與HttpPost區別所在，這裏是將參數在地址中傳遞
                HttpResponse response=new DefaultHttpClient().execute(httpGet);
                if(response.getStatusLine().getStatusCode()==200){
                        HttpEntity entity=response.getEntity();
                        result=EntityUtils.toString(entity, HTTP.UTF_8);
                }
                return result;
        }

（二）HttpPost ：doPost()方法
//doPost():將參數打包到http報頭中傳遞

public String getReultForHttpPost(String name,String pwd) throws ClientProtocolException, IOException{
                //服務器  ：服務器項目  ：servlet名稱
                String path="http://192.168.5.21:8080/test/test";
                HttpPost httpPost=new HttpPost(path);
                List<NameValuePair>list=new ArrayList<NameValuePair>();
                list.add(new BasicNameValuePair("name", name));
                list.add(new BasicNameValuePair("pwd", pwd));
                httpPost.setEntity(new UrlEncodedFormEntity(list,HTTP.UTF_8));//編者按：與HttpGet區別所在，這裏是將參數用List傳遞

                String result="";

                HttpResponse response=new DefaultHttpClient().execute(httpPost);
                if(response.getStatusLine().getStatusCode()==200){
                        HttpEntity entity=response.getEntity();
                        result=EntityUtils.toString(entity, HTTP.UTF_8);
                }
                return result;
        }

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由此咱們可知，HttpGet和HttpPost的區別在於前者是將參數在地址中傳遞，後者是將參數用List傳遞。