Пример использования API java.net

1  package com.asw.net.ex2;
2  import java.io.*;
3  import java.net.*;
4  
5  public class BillingClientService extends Thread {
6  ObjectInputStream ois;
7  ObjectOutputStream oos;
8  BillingService bs;
9  Socket s;
10  
11  public BillingClientService(BillingService bs,Socket s){
12    System.out.println("Constructor BillingClientService\n");
13    this.bs = bs;
14    this.s = s;
15    try {
16      this.oos = new ObjectOutputStream(s.getOutputStream());
17      this.ois = new ObjectInputStream(s.getInputStream());
18    } catch (IOException e) {
19      // TODO Auto-generated catch block
20      e.printStackTrace();
21    }
22    
23    System.out.println("Stream`s done \n socket="+s);
24  }
25  public void run(){
26    System.out.println("ClientService thread started\n");
27    boolean work = true;
28    while (work) {
29      int command;
30      Object o;
31      try {
32        o = ois.readObject();              
33        if (o instanceof Card[]) {
34          Card[] cards = (Card[])o;
35          for (int i=0;i<cards.length;i++){
36            bs.addNewCard(cards[i]);
37          }
38        }else if (o instanceof CardOperation[]){
39          CardOperation[] co = (CardOperation[])o;
40          for (int i=0;i<co.length;i++){
41            bs.addMoney(co[i].card,co[i].amount);
42          }
43        }else if (o instanceof String){
44          oos.writeObject(bs.getCard((String)o)); 
45        }else System.out.println("Bad operation");
46        
47      } catch (IOException e) {
48        e.printStackTrace();
49      } catch (ClassNotFoundException e) {
50        e.printStackTrace();
51      }
52    }
53  }
54  }

1  package com.asw.net.ex2;
2  import java.net.*;
3  import java.util.Date;
4  import java.io.*;
5  
6  
7  public class BillingClient {
8  
9  int serverPort = 7896;
10  String serverName;
11  Socket s;
12  ObjectInputStream ois;
13  ObjectOutputStream oos;
14  public BillingClient(String serverName){
15    this.serverName = serverName;
16  }
17  public void startTest() throws IOException{
18    connectToServer();
19          
20    Card[] cards = {new Card("Piter",new Date(),"1",0.0),
21            new Card("Stefan",new Date(),"2",0.0),
22            new Card("Nataly",new Date(),"3",0.0)};
23    processCard(cards);
24    
25    int cnt = 30000;
26    CardOperation[] co = new CardOperation[cnt];
27    for (int i = 0; i < cnt; i++) {
28      switch (i%3){
29      case 0:  co[i] = new CardOperation("1",1,new Date());break;
30      case 1:  co[i] = new CardOperation("2",2,new Date());break;
31      case 2: co[i] = new CardOperation("3",3,new Date());break;
32      }
33    }
34    processOperation(co);
35    try {
36      System.out.println("getCard: "+getCard("1"));
37      System.out.println("getCard: "+getCard("2"));
38      System.out.println("getCard: "+getCard("3"));
39    } catch (IOException e1) {
40      e1.printStackTrace();
41    } catch (ClassNotFoundException e1) {
42      e1.printStackTrace();
43    }
44    
45    java.lang.Object sync = new java.lang.Object();
46    synchronized (sync) {
47      try {
48        sync.wait();
49      } catch (InterruptedException e) {
50        e.printStackTrace();
51      }
52    }
53    
54  }
55  void connectToServer() throws UnknownHostException, IOException{
56    s = new Socket(serverName, serverPort);
57    System.out.println("connection established\n");
58    ois = new ObjectInputStream(s.getInputStream());
59    oos = new ObjectOutputStream(s.getOutputStream());
60    System.out.println("Stream`s done \n ois="+ois+"\n oos="+oos);
61  }
62  void processOperation(CardOperation[] co) throws IOException{
63    System.out.println(co);
64    oos.writeObject(co);
65  }
66  void processCard(Card[] c) throws IOException{
67    System.out.println("processCard: c="+c);
68    oos.writeObject(c);
69  }
70  Card getCard(String card) throws IOException, ClassNotFoundException{
71    oos.writeObject(card);
72    return (Card)ois.readObject();
73  }
74  public static void main(String[] args) throws Exception{
75    BillingClient bc = new BillingClient(args[0]);
76    try {
77      bc.startTest();
78    } catch (IOException e) {
79      e.printStackTrace();
80    }
81  }
82  }