开发简单资源层
资源层是一个Socket服务程序，当它接收到客户端发送来的字符串时，就在这个字符串前增加"Hello："字符串，然后返回这个新的字符串。代码如例程1所示。
例程1 EIS资源层
1 package com.hellking.jca.eis;
2 import java.net.*;
3 import java.io.*;
4 public class EISServer
5 {
6 public static void main(String[] args)
7 {
8 try
9 {
10 System.out.println ("启动服务....");
11 ServerSocket s = new ServerSocket (2008);
12 // 处理客户端请求
13 while (true)
14 {
15 System.out.println ("监听客户端连接...");
16 new ServerThread(s.accept()).start();
17 System.out.println ("接收到一个连接");
18 }
19 }
20 catch(Exception e)
21 {
22 e.printStackTrace(System.err);
23 }
24 }
25 }
26
27 class ServerThread extends Thread
28 {
29 private Socket socket=null;
30 public ServerThread(Socket socket)
31 {
32 super("a new thread");
33 this.socket=socket;
34 }
35 public void run()
36 {
37 try
38 {
39 BufferedReader in = new BufferedReader
40 (new InputStreamReader (socket.getInputStream()));
41 PrintStream out = new PrintStream(socket.getOutputStream());
42 String line;
43 do
44 {
45 line = in.readLine();
46 System.out.println ("接收到以下输入: " + line);
47 if (line != null)
48 {
49 out.println ("Hello: "+line);
50 }
51 } while (line != null);
52 System.out.println ("关闭连接");
53 socket.close();
54 }
55 catch(Exception e)
56 {
57 e.printStackTrace();
58 }
59 }
60 }
61
2 import java.net.*;
3 import java.io.*;
4 public class EISServer
5 {
6 public static void main(String[] args)
7 {
8 try
9 {
10 System.out.println ("启动服务....");
11 ServerSocket s = new ServerSocket (2008);
12 // 处理客户端请求
13 while (true)
14 {
15 System.out.println ("监听客户端连接...");
16 new ServerThread(s.accept()).start();
17 System.out.println ("接收到一个连接");
18 }
19 }
20 catch(Exception e)
21 {
22 e.printStackTrace(System.err);
23 }
24 }
25 }
26
27 class ServerThread extends Thread
28 {
29 private Socket socket=null;
30 public ServerThread(Socket socket)
31 {
32 super("a new thread");
33 this.socket=socket;
34 }
35 public void run()
36 {
37 try
38 {
39 BufferedReader in = new BufferedReader
40 (new InputStreamReader (socket.getInputStream()));
41 PrintStream out = new PrintStream(socket.getOutputStream());
42 String line;
43 do
44 {
45 line = in.readLine();
46 System.out.println ("接收到以下输入: " + line);
47 if (line != null)
48 {
49 out.println ("Hello: "+line);
50 }
51 } while (line != null);
52 System.out.println ("关闭连接");
53 socket.close();
54 }
55 catch(Exception e)
56 {
57 e.printStackTrace();
58 }
59 }
60 }
61
