Android中使用HttpGet和HttpPost访问HTTP资源和区别

需求：用户登录（name:用户名， pwd :密码）

（一）HttpGet :doGet()方法
//doGet():将参数的键值对附加在url后面来传递

 public String getResultForHttpGet(String name,String pwd) throws ClientProtocolException, IOException{
                 //服务器  ：服务器项目  ：servlet名称
                 String path="http://192.168.5.21:8080/test/test";
                 String uri=path+"?name="+name+"&pwd="+pwd;
                 //name:服务器端的用户名，pwd:服务器端的密码
                 //注意字符串连接时不能带空格

                 String result="";

                 HttpGet httpGet=new HttpGet(uri);//编者按：与HttpPost区别所在，这里是将参数在地址中传递
                 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():将参数打包到http报头中传递

 public String getReultForHttpPost(String name,String pwd) throws ClientProtocolException, IOException{
                 //服务器  ：服务器项目  ：servlet名称
                 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));//编者按：与HttpGet区别所在，这里是将参数用List传递

                 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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由此我们可知，HttpGet和HttpPost的区别在于前者是将参数在地址中传递，后者是将参数用List传递。