day5.23总结_Socket(单聊和群聊)

一、一个客户端对应一个服务器

class Server{          ServerSocket ss;          public void start(){                   try {                            ss=new ServerSocket(38383);//创建一个服务端                            while(true){                                     Socket s = ss.accept();//获取链接上的客户端                                     new Task(s).start();                            }                   } catch (IOException e) {                            e.printStackTrace();                   }finally{                            try {                                     ss.close();                            } catch (IOException e) {                                     e.printStackTrace();                            }                   }          }            private class Task extends Thread{                   Socket socket;                   public Task(Socket s){                            this.socket=s;                   }                   @Override                   public void run() {                            try {                            OutputStream out = socket.getOutputStream();                            InputStream in = socket.getInputStream();                            PrintWriter pw = new PrintWriter(new OutputStreamWriter(out, "utf-8"), true);                            BufferedReader br = new BufferedReader(new InputStreamReader(in, "utf-8"));                                     pw.println("吃点啥");                                     while(true){                                              String req=br.readLine();                                              if (req.equals("都有啥")) {                                                       pw.println("山珍海味");                                              }else if (req.equals("bye")) {                                                       pw.println("欢迎下次光临");                                                       break;                                              }else{                                                       pw.println("木有"+req);                                              }                                     }                                     br.close();                                     pw.close();                                     socket.close();                            } catch (Exception e) {                                     e.printStackTrace();                            }                            super.run();                   }          } }   public class ServerDemo {            public static void main(String[] args) {                   new Server().start();          } }

class Client{          Socket socket;          public void start(){                   try {                            socket=new Socket("192.168.11.145", 38383);                            InputStream in = socket.getInputStream();                            OutputStream out = socket.getOutputStream();                            PrintWriter pw = new PrintWriter(new OutputStreamWriter(out, "utf-8"), true);                            BufferedReader br = new BufferedReader(new InputStreamReader(in, "utf-8"));                            System.out.println(br.readLine());                            Scanner sc = new Scanner(System.in);                            while( true){                                     String req = sc.nextLine();                                     pw.println(req);                                     String resp=br.readLine();                                     System.out.println(resp);                                     if ("欢迎下次光临".equals(resp)) {                                              break;                                     }                            }                            br.close();                            pw.close();                            socket.close();                   } catch (Exception e) {                            e.printStackTrace();                   }          } } public class ClientDemo {          public static void main(String[] args) {                   new Client().start();          } }

二、群聊

class Server{          ServerSocket ss;          List<Socket> sockets;          public void start(){                   try {                            ss=new ServerSocket(38383);                            sockets=new ArrayList<Socket>();                            while(true){                                     Socket s = ss.accept();                                     sockets.add(s);                                     new Task(s).start();                            }                   } catch (Exception e) {                            e.printStackTrace();                   }finally{                            try {                                     ss.close();                            } catch (IOException e) {                                     e.printStackTrace();                            }                   }          }            public class Task extends Thread{                   Socket socket;                     public Task(Socket s) {                            super();                            this.socket = s;                   }                   @Override                   public void run() {                            try {                            InputStream in = socket.getInputStream();                            BufferedReader br = new BufferedReader(new InputStreamReader(in,"utf-8"));                                     while(true){                                              String line =br.readLine();                                              if (line==null) {//客户端发过来是空就关闭                                                       br.close();                                                       throw new RuntimeException("客户端已关闭");                                              }                                              for(Socket s:sockets){                            OutputStream out = s.getOutputStream();                            PrintWriter pw = new PrintWriter(new OutputStreamWriter(out, "utf-8"), true);                                                       pw.println(line);                                              }                                     }                              } catch (Exception e) {                                     e.printStackTrace();                            }finally{                                     try {                                              socket.close();                                              sockets.remove(socket);                                     } catch (IOException e) {                                              e.printStackTrace();                                     }                            }                   }          } } public class ChatServer {            public static void main(String[] args) {                   new Server().start();          } }

public class MainActivity extends Activity {            ListView listview;          List<String> chats;          ArrayAdapter<String> adapter;          EditText etNickName,etContent;          TextView tvEmpty;          LinearLayout llConnect,llChat;          Socket socket;          BufferedReader br;          PrintWriter pw;          Button btnconnetct,btnsend;          boolean flag=true;          @Override          protected void onCreate(Bundle savedInstanceState) {                   super.onCreate(savedInstanceState);                   setContentView(R.layout.activity_main);                   initView();                   listview.setAdapter(adapter);                            }            private void initView() {                     listview=(ListView) findViewById(R.id.listView1);                   chats=new ArrayList<String>();                   adapter=new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,chats);                                     etNickName=(EditText) findViewById(R.id.nickName);                   etContent=(EditText) findViewById(R.id.content);                                     tvEmpty=(TextView) findViewById(R.id.nochat);                   listview.setEmptyView(tvEmpty);                                     llConnect=(LinearLayout) findViewById(R.id.connet);                   llChat=(LinearLayout) findViewById(R.id.ll_chat);                   btnconnetct=(Button) findViewById(R.id.btn_connect);                   btnsend=(Button) findViewById(R.id.btn_send);                   }                   public void connect(View v){                   new Thread(){                            public void run() {                                     try {                                              socket=new Socket("192.168.11.145", 38383);          br = new BufferedReader(new InputStreamReader(socket.getInputStream(), "utf-8"));          pw = new PrintWriter(new OutputStreamWriter(socket.getOutputStream(), "utf-8"), true);                                                                                           //启动一个线程，时刻保持对服务器发送过来的信息                                              new Thread(){                                                       public void run() {                                                                try {                                                                         while(flag){                                                                                  final String resp = br.readLine();                                                                                  if (resp==null) {                                                                                           throw new RuntimeException("服务器已关闭");                                                                                  }                                                                                                                                                                   //更新listview                                                                                  runOnUiThread(new Runnable() {                                                                                                                                                                                     public void run() {                                                                                                    chats.add(resp);                                                                                                    adapter.notifyDataSetChanged();                                                                                           }                                                                                  });                                                                         }                                                                } catch (Exception e) {                                                                         e.printStackTrace();                                                                }                                                       };                                              }.start();                                                                                           runOnUiThread(new Runnable() {更新UI                                                                                                             @Override                                                       public void run() {                                                                llConnect.setVisibility(View.GONE);                                                                llChat.setVisibility(View.VISIBLE);                                                       }                                              });                                     } catch (Exception e) {                                              e.printStackTrace();                                     }                            };                   }.start();          }                   public void send(View v){                   final String line = etContent.getText().toString();                   if (TextUtils.isEmpty(line)) {                            return;                   }                                     new Thread(){                            public void run() {                                     String nickname =etNickName.getText().toString();                                     if (TextUtils.isEmpty(nickname)) {                                              nickname="1602A学员";                                     }                                     pw.println(nickname+":"+line);                            };                   }.start();          }                   @Override          protected void onDestroy() {                   super.onDestroy();                   try {                            socket.close();                            flag=false;                   } catch (IOException e) {                            e.printStackTrace();                   }          } }

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="vertical"     tools:context=".MainActivity" >       <ListView         android:id="@+id/listView1"         android:layout_width="match_parent"         android:layout_height="0dp"         android:layout_weight="1"         android:transcriptMode="alwaysScroll">     </ListView>     <TextView         android:id="@+id/nochat"         android:layout_width="match_parent"         android:layout_height="0dp"         android:layout_weight="1"         android:text="没有聊天内容……"         android:gravity="center"         android:textSize="30sp"/>       <LinearLayout         android:id="@+id/connet"         android:layout_width="wrap_content"         android:layout_height="wrap_content" >           <EditText             android:id="@+id/nickName"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_alignParentBottom="true"             android:layout_alignParentLeft="true"             android:ems="10"             android:hint="请输入昵称……" >               <requestFocus />         </EditText>           <Button             android:id="@+id/btn_connect"             android:layout_width="102dp"             android:layout_height="wrap_content"             android:onClick="connect"             android:text="链接" />     </LinearLayout>       <LinearLayout         android:id="@+id/ll_chat"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:visibility="gone" >           <EditText             android:id="@+id/content"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:hint="请输入发送内容…………"             android:ems="10" >               <requestFocus />         </EditText>           <Button             android:id="@+id/btn_send"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:onClick="send"             android:text="发送" />     </LinearLayout>   </LinearLayout>