1、编写一服务器端程序，实现读取客户端发送过来的一组整数，表现为一组数与数之间用空格隔开的字符串。对这组整数进行排序处理后，返回相应的字符串给客户端，如果数据格式不正确，则返回错误信息，以本机作为服务器。
public class Server { }
public class Client {
public static void main(String[] args) {
BufferedReader br = null; String clientStr=\; try {
//建立通信端口，并向服务器端发送通信请求
Socket s = new Socket(\,3838);
public static void main(String[] args) {
BufferedReader br = null; String clientStr=\; try {
//创建一个监听的端口
ServerSocket ss = new ServerSocket(3838); Socket s = null;
System.out.println(\服务器启动...\); //接受客户端通信请求，并建立专用通信端口 s = ss.accept();
System.out.println(\有客户端发送请求\); Send send = new Send(s); Thread t1 = new Thread(send); t1.start();
//获取客户端通信的信息
br = new BufferedReader(new
while(true){
InputStreamReader(s.getInputStream()));
clientStr = br.readLine();
System.out.println(\客户端：\+clientStr); }
} catch (IOException e) { }
e.printStackTrace(); }
System.out.println(\与服务器端建立连接\); Send send = new Send(s);
Thread t1 = new Thread(send); t1.start();
}
}
while(true){
//获取客户端通信的信息
br = new BufferedReader(new
InputStreamReader(s.getInputStream()));
clientStr = br.readLine();
System.out.println(\服务器端说：\+clientStr); }
} catch (UnknownHostException e) { }
// TODO Auto-generated catch block e.printStackTrace();
// TODO Auto-generated catch block e.printStackTrace();
} catch (IOException e) {
public class Send implements Runnable{
Socket s ;
Scanner in = new Scanner(System.in); BufferedReader br = new BufferedReader(new public Send(Socket s){ }
public void run() {
}
// TODO Auto-generated catch block e.printStackTrace();
// TODO Auto-generated method stub PrintWriter out = null; try {
while(true){
out = new PrintWriter(new String str = in.next();
//br.readLine();
this.s = s;
InputStreamReader(System.in));
OutputStreamWriter(s.getOutputStream()),true);
out.println(str);
} catch (Exception e) {
}
}
}finally{ }
out.close();
4、编写一个简单的socket通讯程序：
1）、客户机程序，从控制台输入字符串，发送到服务器端，并将服务器返回的信息显示出来。
2)、服务器端程序，从客户机接收数据并打印，同时将从标准输入获取的信息发送给客户机 3）、满足一个服务器可以服务多个客户 实现效果如图：
图1：服务器端效果：
图2：客户器端效果：
public class Server {
static List
try {
ServerSocket so =new ServerSocket(4001); System.out.println(\服务器启动...\); while(true){
Socket s = so.accept();
}
}
}
}
System.out.println(s.getInetAddress()+\发送请求\); l.add(s);
One o = new One();
Thread t = new Thread(o); t.start();
} catch (IOException e) {
// TODO Auto-generated catch block e.printStackTrace();
public class One implements Runnable {
try {
while (true) { }
// TODO Auto-generated catch block
System.out.println(s.getInetAddress() + \用户下线\); Server.l.remove(s);
BufferedReader br = new BufferedReader(new
.getInputStream()));
public void run() {
Socket s = Server.l.get(Server.l.size() - 1); String str = \;
SendAll sendAll = new SendAll(); Thread t1 = new Thread(sendAll); t1.start();
InputStreamReader(s
str = br.readLine();
System.out.println(\客户端\ + s.getInetAddress() + \说：\
+ str); }
}
}
} catch (IOException e) {
public class SendAll implements Runnable{
Scanner in = new Scanner(System.in);
}
BufferedReader br = new BufferedReader(new
public void run(){ }
PrintWriter out = null; try { }
while(true){
String str =br.readLine(); for(Socket s:Server.l){ out = new PrintWriter(new
InputStreamReader(System.in));
OutputStreamWriter(s.getOutputStream()),true);
out.println(str); }
// TODO Auto-generated catch block e.printStackTrace(); out.close();
}
} catch (Exception e) {
}finally{
public class Client {
public static void main(String[] args) {
BufferedReader br = null; String clientStr=\; try {
//建立通信端口，并向服务器端发送通信请求
Socket s = new Socket(\,4001);
System.out.println(\与服务器端建立连接\); Send send = new Send(s);
Thread t1 = new Thread(send); t1.start(); while(true){
//获取客户端通信的信息
br = new BufferedReader(new
InputStreamReader(s.getInputStream()));
clientStr = br.readLine();
System.out.println(\服务器端说：\+clientStr); }
}
}
} catch (UnknownHostException e) { }
// TODO Auto-generated catch block e.printStackTrace();
// TODO Auto-generated catch block e.printStackTrace();
} catch (IOException e) {
public class Send implements Runnable{ }
Socket s ;
Scanner in = new Scanner(System.in); BufferedReader br = new BufferedReader(new public Send(Socket s){ }
public void run() { }
}
}
// TODO Auto-generated catch block e.printStackTrace(); out.close();
// TODO Auto-generated method stub PrintWriter out = null; try {
while(true){
out = new PrintWriter(new String str =br.readLine();
this.s = s;
InputStreamReader(System.in));
OutputStreamWriter(s.getOutputStream()),true);
out.println(str);
} catch (Exception e) {
}finally{