HttpUrlConnection用get和post请求发送参数_urlconnection get参数-优快云博客

本文介绍如何使用Java通过POST和GET请求实现HTTP登录功能，包括设置连接超时、读取超时、组装请求参数、处理响应数据及JSON解析等关键步骤。

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post请求:

    final String nameValue = username.getText().toString();
    final String passValue = password.getText().toString();
            new Thread(){
                public void run() {
                    try {
                        URL url = new URL(login_url);
                        HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
                        urlConn.setConnectTimeout(5*1000);//设置连接时间为5秒
                        urlConn.setReadTimeout(5*1000);//设置读取时间为5秒
                        urlConn.setRequestMethod("POST");//设置请求方式为post
                        urlConn.setDoOutput(true);
                        urlConn.setDoInput(true);
                        //添加参数
                        OutputStream outputStream = urlConn.getOutputStream();
                        String data = "username="+nameValue+"&password="+passValue;//拼装参数
                        outputStream.write(data.getBytes());//上传参数
                        int code = urlConn.getResponseCode();
                        if(code == 200){//相应成功，获得相应的数据
                            InputStream is = urlConn.getInputStream();//得到数据流（输入流）

                            byte[] buffer = new byte[1024];
                            int length = 0;
                            String str = "";
                            while((length = is.read(buffer)) > -1){
                                str += new String(buffer,0,length);
                            }
                            Log.d("main", str);
                            //解析json，展示在ListView（GridView）
                            //h.sendMessage(h.obtainMessage(3, str));
                            LoginResult lr = new Gson().fromJson(str, LoginResult.class);
                            if(lr.getCode() == 1){
                                //可以本地保存服务器发送过来的完整的账号信息
                                User user = lr.getUser();//得到账号的完整信息（从服务器发送过来）
                                String header = user.getHeader();//得到头像url
                                Intent it = new Intent(MainActivity.this,SuccessActivity.class);
                                it.putExtra("headerUrl", header);
                                startActivity(it);
                            }else{
                                Toast.makeText(MainActivity.this, "登陆失败，请重新输入", 0).show();
                            }
                        }

                    } catch (MalformedURLException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                };
            }.start();

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get请求

login.setOnClickListener(new OnClickListener() {        
        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            final String nameValue = username.getText().toString();
            final String passValue = password.getText().toString();
            //访问服务器
            new Thread(){
                public void run() {
                    //拼装url
                    //URLEncoder.encode对汉字进行编码，服务器进行解码设置，解决中文乱码
                    try {
                        String lastUrl = login_url + "?username="+URLEncoder.encode(nameValue, "utf-8")+"&password="+passValue;
                        URL url = new URL(lastUrl);
                        HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();//开发访问此连接
                        //设置访问时长和相应时长
                        urlConn.setConnectTimeout(5*1000);//设置连接时间为5秒
                        urlConn.setReadTimeout(5*1000);//设置读取时间为5秒
                        int code = urlConn.getResponseCode();//获得相应码
                        if(code == 200){//相应成功，获得相应的数据
                            InputStream is = urlConn.getInputStream();//得到数据流（输入流）
                            byte[] buffer = new byte[1024];
                            int length = 0;
                            String data = "";
                            while((length = is.read(buffer)) != -1){
                                String str = new String(buffer,0,length);
                                data += str;
                            }

                            Log.d("main", data);
                            //解析json，展示在ListView（GridView）
                            h.sendMessage(h.obtainMessage(2, data));


                        }

                    } catch (MalformedURLException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }

                };
            }.start();
        };
    });