用httpurlconnection时当要outputstream时中断连接，这是为什么

2017-03-23 12:42:09 241 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

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Java生产级文件下载：HTTP协议、NIO与移动端适配实战文件下载是Web和移动应用的基础能力，其本质是HTTP协议交互与本地I/O协同的过程。理解状态码语义、连接生命周期、Range断点续传等核心原理，是构建稳定下载能力的前提。Java中HttpURLConnection与HttpClient在超时控制、重定向处理、连接复用上存在关键差异；NIO的transferTo零拷贝可显著提升大文件性能，但也需规避Linux内核限制与FAT32兼容性问题；Android Scoped Storage强制要求MediaStore适配，而‘stream disconnecte 阅读详情





 protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        input=(EditText)this.findViewById(R.id.input);

        output=(TextView)this.findViewById(R.id.output);

        send=(Button) this.findViewById(R.id.send);



        send.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {



                final String Output=input.getText().toString().trim();

                new Thread(new Runnable() {

                    @Override

                    public void run() {

                        String path="http://192.168.11.254:8080";

                        

                        try {

                            URL url=new URL(path);

                            //打开http连接

                            HttpURLConnection conn= (HttpURLConnection) url.openConnection();



                            conn.setDoInput(true);

                            conn.setDoOutput(false);

                            conn.setRequestMethod("POST");

                          //  conn.setRequestMethod("GET");

                            conn.setConnectTimeout(1000*30);//连接超时时间

                            conn.setReadTimeout(1000*30);//读取数据的超时时间

                            conn.setUseCaches(false);

//                            conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

//                            conn.setRequestProperty("Connection", "Keep-Alive");// 维持长连接

//                            conn.setRequestProperty("Charset", "UTF-8");

//                            conn.setRequestProperty("Content-type", "application/x-java-serialized-object");

                              conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

                            conn.connect();

                            //对服务器端读取或写入数据

                            OutputStream outStrm=conn.getOutputStream();

                            //获取响应数据

                            ObjectOutputStream outputStream=new ObjectOutputStream(outStrm);

                            outputStream.writeObject(Output);

                            int code=conn.getResponseCode();

                            String sCurrentLine="";

                            String sTotalString="";

                            if(code==200){

                                InputStream os=conn.getInputStream();

                                BufferedReader reader=new BufferedReader(new InputStreamReader(os));

                                while((sCurrentLine=reader.readLine())!=null){

                                    if(sCurrentLine.length()>0){

                                        sTotalString=sTotalString+sCurrentLine.trim();

                                     

                                    }

                                }

                                final String finalLine = sTotalString;

                                runOnUiThread(new Runnable() {

                                    @Override

                                    public void run() {

                                        output.setText("内容:"+ finalLine);

                                        Toast.makeText(MainActivity.this,"try!!!",Toast.LENGTH_SHORT).show();

                                    }

                                });

                            }else{

                                Toast.makeText(MainActivity.this,"fail!",Toast.LENGTH_LONG).show();

                            }



                            //System.out.println("result"+result);

                            conn.disconnect();//关闭连接



                        } catch (MalformedURLException e) {

                            e.printStackTrace();

                        } catch (IOException e) {

                            e.printStackTrace();

                        }





                    }

                }).start();



            }

        });

    }



}