FROM:http://www.java2000.net/viewthread.jsp?tid=686
1 服務器端程序，接受連接并處理客戶端的請求
ServerApp.java
package
?test;
import
?java.io.
*
;
import
?java.net.
*
;
/**
?*?服務器端程序
?*?
?*?
@author
?luxuan310，修正趙學慶。
?*?
?
*/
public
?
class
?ServerApp?
{
??
static
?
final
?
int
?PORT?
=
?
9000
;
??
private
?ServerSocket?serverSocket;
??
private
?Socket?socket;
??
private
?BufferedReader?netIn;
??
private
?PrintWriter?netOut;
??
public
?ServerApp()?
throws
?IOException?
{
??
????serverSocket?
=
?
new
?ServerSocket(PORT);
????System.out.println(
"
server?start
"
);
????
while
?(
true
)?
{
??????
//
?等待連接
??????socket?
=
?serverSocket.accept();
??????ServerThread?st?
=
?
new
?ServerThread(socket);
??????
new
?Thread(st).start();
????}
??}
??
class
?ServerThread?
implements
?Runnable?
{
????
private
?Socket?socket;
????
private
?
int
?randomNumber;
????
private
?
int
?clientGuessNumber;
????
public
?ServerThread(Socket?s)?
throws
?IOException?
{
??????socket?
=
?s;
??????netIn?
=
?
new
?BufferedReader(
new
?InputStreamReader(socket.getInputStream()));
??????netOut?
=
?
new
?PrintWriter(socket.getOutputStream());
????}
????
public
?
void
?run()?
{
??????System.out.println(
"
client
"
?
+
?socket.getInetAddress()?
+
?
"
?is?connect
"
);
??????randomNumber?
=
?(
int
)?(Math.random()?
*
?
100
);
??????System.out.println(
"
random?number?is:
"
?
+
?randomNumber);
??????
try
?
{
????????clientGuessNumber?
=
?Integer.parseInt(netIn.readLine());
????????System.out.println(
"
client?guess?number?is:
"
?
+
?clientGuessNumber);
????????
for
?(
int
?i?
=
?
3
;?i?
>
?
0
;?i
--
)?
{
??????????
if
?(clientGuessNumber?
==
?randomNumber)?
{
????????????netOut.println(
"
OK,恭喜，猜對了
"
);
????????????ClientApp.finished?
=
?
true
;
??????????}
?
else
?
if
?(clientGuessNumber?
<
?randomNumber)?
{
????????????netOut.println(
"
您猜的數小了，您還有
"
?
+
?(i?
-
?
1
)?
+
?
"
次機會
"
);
????????????ClientApp.finished?
=
?
false
;
??????????}
?
else
?
if
?(clientGuessNumber?
>
?randomNumber)?
{
????????????netOut.println(
"
您猜的數大了，您還有
"
?
+
?(i?
-
?
1
)?
+
?
"
次機會
"
);
????????????ClientApp.finished?
=
?
false
;
??????????}
??????????netOut.flush();
??????????
if
?(
!
ClientApp.finished)?
{
????????????clientGuessNumber?
=
?Integer.parseInt(netIn.readLine());
??????????}
?
else
?
{
????????????
break
;
??????????}
????????}
????????
if
?(
!
ClientApp.finished)?
{
??????????netOut.println(
"
OK,您沒有機會了，游戲結束
"
);
????????}
????????ClientApp.finished?
=
?
true
;
??????}
?
catch
?(IOException?e)?
{
??????}
?
finally
?
{
????????
try
?
{
??????????netOut.close();
??????????netIn.close();
??????????socket.close();
????????}
?
catch
?(IOException?ee)?
{
????????}
??????}
????}
??}
??
public
?
static
?
void
?main(String[]?args)?
throws
?IOException?
{
????
new
?ServerApp();
??}
}
2 客戶端程序，發送每次猜的數字
package
?test;
import
?java.io.
*
;
import
?java.net.
*
;
public
?
class
?ClientApp?
{
??
private
?Socket?socket;
??
private
?BufferedReader?netIn;
??
private
?PrintWriter?netOut;
??
private
?BufferedReader?keyboardIn;
??
static
?Boolean?finished?
=
?
false
;
??
public
?ClientApp()?
throws
?IOException?
{
????System.out.println(
"
請輸入服務器地址，連接本地服務器請輸入localhost
"
);
????keyboardIn?
=
?
new
?BufferedReader(
new
?InputStreamReader(System.in));
????
try
?
{
??????
if
?(keyboardIn.readLine().equalsIgnoreCase(
"
localhost
"
))?
{
????????socket?
=
?
new
?Socket(InetAddress.getLocalHost(),?ServerApp.PORT);
??????}
?
else
?
{
????????socket?
=
?
new
?Socket(InetAddress.getByName(keyboardIn.readLine()),?ServerApp.PORT);
??????}
??????netIn?
=
?
new
?BufferedReader(
new
?InputStreamReader(socket.getInputStream()));
??????netOut?
=
?
new
?PrintWriter(socket.getOutputStream());
????}
?
catch
?(UnknownHostException?e)?
{
??????System.err.println(
"
連接不到服務器
"
);
??????System.exit(
-
1
);
????}
????System.out.println(
"
連接成功
"
);
????
while
?(
!
finished)?
{
??????System.out.println(
"
請輸入0－100之間的數字
"
);
??????netOut.println(keyboardIn.readLine());
??????netOut.flush();
??????String?str?
=
?netIn.readLine();
??????
if
?(str?
==
?
null
)?
{
????????finished?
=
?
true
;
????????
break
;
??????}
??????System.out.println(str);
??????
if
?(str.startsWith(
"
OK
"
))?
{
????????finished?
=
?
true</
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