android中get方式和post方式提交数据到服务器的区别

1.请求的URL地址不同

get: http://10.0.2.2:8080/HttpTest/index.jsp?option=getUser&uName=jerehedu
post: http://10.0.2.2:8080/HttpTest/index.jsp

2.post方式多了对请求头的设置

  //设置一些请求头的信息 field：http请求的请求头   newValue：请求头的值
            httpURLConnection.setRequestProperty("Charset","UTF-8");
            httpURLConnection.setRequestProperty("Content-type","application/x-www-form-urlencoded");

3.post方式还多了请求的内容—option=getUser&uName=jerehedu，而get方式的相应内容在URL地址中

            //设置httpURLConnection可以请求的内容
            httpURLConnection.setDoOutput(true);
            //option=getUser&uName=jerehedu
            String params=args;
            //获取一个outputstream，并将内容写入该流
            OutputStream os=httpURLConnection.getOutputStream();

4.请求时携带的内容大小不同

get：1k
post：理论上无限制
即post适合传大量数据

5.get方式的数据直接明文显示在URL地址中，是不安全的；而post方式则不会，安全性相对较高

get方式的代码：

public static String doGet(String u){
        HttpURLConnection con=null;
        InputStream is=null;
        StringBuilder sbd=new StringBuilder();
        try {
            URL url=new URL(u);
            con= (HttpURLConnection) url.openConnection();
            con.setConnectTimeout(5*1000);  //设置超时时间
            con.setReadTimeout(5*1000);     //设置读取时间
// con.setRequestMethod("GET");
            if(con.getResponseCode()==200){ //判断是否连接成功
                is=con.getInputStream();    //获取输入
                int next=0;
                byte[] bt=new byte[1024];
                while((next=is.read(bt))!=-1){
                    sbd.append(new String(bt),0,next);  //读入到sbd中
                }
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if(con!=null){
                con.disconnect();
            }
        }
        return sbd.toString();
    }

post方式的代码：

 public static String doPost(String uri,String args){
        HttpURLConnection httpURLConnection=null;
        InputStream is=null;
        StringBuilder sbd=new StringBuilder();
        try {
            URL url=new URL(uri);
            httpURLConnection= (HttpURLConnection) url.openConnection();
            httpURLConnection.setConnectTimeout(5*1000);
            httpURLConnection.setReadTimeout(5*1000);
            httpURLConnection.setRequestMethod("POST");
            //设置httpURLConnection可以请求的内容
            httpURLConnection.setDoInput(true);
            httpURLConnection.setDoOutput(true);
            httpURLConnection.setUseCaches(false);
            //设置一些请求头的信息 field：http请求的请求头 newValue：请求头的值
            httpURLConnection.setRequestProperty("Charset","UTF-8");
            httpURLConnection.setRequestProperty("Content-type","application/x-www-form-urlencoded");
            //option=getUser&uName=jerehedu
            String params=args;
            //获取一个outputstream，并将内容写入该流
            OutputStream os=httpURLConnection.getOutputStream();
            os.write(params.getBytes());
            os.flush();
            os.close();

            if(httpURLConnection.getResponseCode()==200){
                is=httpURLConnection.getInputStream();
                int next=0;
                byte[] b=new byte[1024*10];
                while((next=is.read(b))>0){
                    sbd.append(new String(b,0,next));
                }
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if(is!=null){
                    is.close();
                }
                if(httpURLConnection!=null){
                    httpURLConnection.disconnect();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return sbd.toString();
    }