常用流的基本操作记录

 

System.in
  String line;
  InputStreamReader input = new InputStreamReader(System.in);//System.in为nputStream类u22411 
  System.out.println("Enter data and push enter");
  BufferedReader reader = new BufferedReader(input);
  line = reader.readLine();
  System.out.println("data entered--->"+line);
FILE
 private String forTest(String file) throws IOException {
  BufferedReader in = new BufferedReader(new FileReader(file));
  String s, s2 = new String();
  while ((s = in.readLine()) != null)
   s2 += s + "\n";
  in.close();
  return s2;
 }


 public void generCorpFile(String localSavePath,String path, List list) {
  if (!(new File(localSavePath).isDirectory())) {
   new File(localSavePath).mkdir();
  }
  if (!(new File(path).isDirectory())) {
   new File(path).mkdir();
  }

  File file = new File(path + File.separator + "corporation");
  PrintWriter out = null;
  try {
   out = new PrintWriter(new FileWriter(file));
   if (list != null && list.size() > 0) {
    for (int i = 0; i < list.size(); i++) {
     CorpModel data = (CorpModel) list.get(i);
     out.print(data.toString());
    }
   }
   out.flush();
  } catch (IOException e) {
  } finally {
   if (out != null)
    out.close();
  }
 }

HTTP

 private String readXMLFromRequestBody(HttpServletRequest request)
   throws UnsupportedEncodingException {
  StringBuffer xml = new StringBuffer();
  String line = null;
  try {
   BufferedReader reader = request.getReader();
   while ((line = reader.readLine()) != null) {
    xml.append(line);
   }
   Logoo.info(xml.toString());
  } catch (Exception e) {
   Logoo.error(e.getMessage(), e);
  }
  return xml.toString();
 }

 public static void sendGisRequest() {
  URL url = null;
  BufferedWriter writer = null;
  BufferedReader in = null;
  URLConnection conn = null;
  StringBuffer sb = new StringBuffer();
  try {
   url = new URL("http://10.10.43.210:8080/cstar/NvLoveServlet?actiontype=hellodrf");
   conn = url.openConnection();
   conn.setDoInput(true);
   conn.setDoOutput(true);
   in = new BufferedReader(new InputStreamReader(
     conn.getInputStream(), "UTF-8"));
   for (String line = null; (line = in.readLine()) != null;) {
    sb.append(line + "\n");
   }
   in.close();
   String responseXML = sb.toString();
  } catch (MalformedURLException ue) {
   Logoo.debug(ue.getMessage());
  } catch (Exception ioe) {
   Logoo.debug(ioe.getMessage());
  } finally {
  }
 }

SOCKET
import java.net.*;
import java.io.*;

public class Server {
 private ServerSocket ss;
 private Socket socket;
 private BufferedReader in;
 private PrintWriter out;

 public Server() {
  try {
   ss = new ServerSocket(10000);

   while (true) {
    socket = ss.accept();
    in = new BufferedReader(new InputStreamReader(
      socket.getInputStream()));
    out = new PrintWriter(socket.getOutputStream(), true);

    String line = in.readLine();
    out.println("you input is :" + line);
    out.close();
    in.close();
    socket.close();
   }
   ss.close();
  } catch (IOException e) {
  }
 }

 public static void main(String[] args) {
  new Server();
 }
}

///////////////////
import java.io.*;
import java.net.*;

public class Client {
 Socket socket;
 BufferedReader in;
 PrintWriter out;

 public Client() {
  try {
   socket = new Socket("xxx.xxx.xxx.xxx", 10000);
   in = new BufferedReader(new InputStreamReader(
     socket.getInputStream()));
   out = new PrintWriter(socket.getOutputStream(), true);
   BufferedReader line = new BufferedReader(new InputStreamReader(
     System.in));

   out.println(line.readLine());
   line.close();
   out.close();
   in.close();
   socket.close();
  } catch (IOException e) {
  }
 }

 public static void main(String[] args) {
  new Client();
 }
}


http://tech.163.com/06/0410/09/2EBABUD20009159T_2.html
UDP
    DatagramSocket receiveSocket, sendSocket;
    DatagramPacket receivePacket ,sendPacket;

 public void receiveMessage()//服u21153 器u21457 送u28040 息
   {
      try
      { 
        receiveSocket=new DatagramSocket(4001);//服u21153 器u25509 受u31471 口
        
        while(true)
        {
           
           
            byte[] buf=new byte[200];
            receivePacket=new DatagramPacket(buf,buf.length);
            receiveSocket.receive(receivePacket);
            ip=receivePacket.getAddress();
            if(receivePacket.getLength()==0)
            {
             ta.append("空u28040 息"); 
            continue;
            }
            ByteArrayInputStream bin=new ByteArrayInputStream(receivePacket.getData());
            BufferedReader read=new BufferedReader(new InputStreamReader(bin));
            ta.append("客u25143 端"+read.readLine());
            ta.append("\n");
            read.close();
            bin.close();
            
        }
        }
           catch(Exception e)
           {
             ta.append(e+"sendmessage error\n"); 
           
           }
            
   }
   public void sendMessage()
   {
     try{
     String s=tf.getText();
     tf.setText("");
     ta.append("服u21153 器"+s);
     ta.append("\n");
     ByteArrayOutputStream out=new ByteArrayOutputStream();
     PrintStream pout=new PrintStream(out);
     pout.print(s);
     byte[] buf=out.toByteArray();
     sendPacket=new DatagramPacket(buf,buf.length,ip,3001);
     sendSocket.send(sendPacket);
     buf=null;
     }
     catch(Exception e)
     {
     ta.append(e+"\n"); 
       
     }
    } 

http://blog.youkuaiyun.com/wintys/article/details/3525643