android的GET请求失败，一直无法发送

àì夳堔傛蜴生んèń 2022-09-27 15:30 165阅读 0赞

今天做安卓的时候，需要连接服务器，因为数据传的比较少 ，所以不想用post请求，用的get请求，但是一直无法成功，不得其原因，后来才知道get请求的URL中不能包含空格，

下面是post请求的代码，无注解，要详细看的，请看我以前的文章，网络请求必须开辟新的线程

private void sendRequest(final String sign){
        new Thread(new Runnable() {
            @Override
            public void run() {
                String url="http://"+ MyIp.ip+":8080/CarSafe/InsertBlogServlet";
                HttpURLConnection connection=null;
                try{
                    URL posturl=new URL(url);
                    connection=(HttpURLConnection)posturl.openConnection();
                    connection.setDoOutput(true);
                    connection.setDoInput(true);
                    connection.setRequestMethod("POST");
                    connection.setUseCaches(false);
                    connection.setInstanceFollowRedirects(true);
                    connection.connect();
                    DataOutputStream out=new DataOutputStream(connection.getOutputStream());
                    String content="car_id="+ URLEncoder.encode(String.format("%d",Person.car_id),"utf-8")+
                            "&username="+URLEncoder.encode(Person.usename,"utf-8")+"&mysign="+URLEncoder.encode(sign,"utf-8");
                    out.writeBytes(content);
                    out.flush();
                    out.close();
                    BufferedReader reader=new BufferedReader(new InputStreamReader(connection.getInputStream()));
                    String line;
                    StringBuffer response=new StringBuffer();
                    while((line=reader.readLine())!=null){
                        response.append(line);
                    }
                    reader.close();
                    Message message=new Message();
                    message.what=SEND_SIGN;
                    message.obj=response.toString();
                    handler.sendMessage(message);
                }catch (Exception e){
                    e.printStackTrace();
                }finally {
                    if(connection!=null){
                        connection.disconnect();
                    }
                }
            }
        }).start();
    
    }