Question

利用Java编写一个程序利用Socket，实现网络的点对点文件传输并且能实现聊天，发个给我学习下，好吗？

Answer 1

这个时比较简单的。
package QQ;

import java.net.*;
import java.io.*;
import java.sql.*;
import java.util.*;

public class QQServer {
public static void main(String args[]) {
try {
HashMap<String , Socket> hm = new

HashMap<String , Socket>() ;
// 服务器到8000端口监听(1)
ServerSocket ss = new ServerSocket

(8000);

while (true) {
System.out.println("服务器正在

8000端口监听.....");
Socket s = ss.accept();

MyService t = new MyService();
t.setSocket(s) ;
t.setHashMap(hm) ;
t.start();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}

class MyService extends Thread {
private Socket s ;
private HashMap<String , Socket> hm ;
public void setHashMap(HashMap<String , Socket> hm){
this.hm = hm ;
}
public void setSocket(Socket s){
this.s = s ;
}
public void run() {
try {
// 接收客户端发送来的用户名和密码(2)
InputStream is = s.getInputStream();
InputStreamReader isr = new InputStreamReader

(is);
BufferedReader br = new BufferedReader(isr);

String uandp = br.readLine();

// 拆分用户名和密码(4)
String u = "";
String p = "";
try{
u = uandp.split("%")[0];
p = uandp.split("%")[1];
}catch(Exception e){}

// 到数据库中验证(5)
Class.forName

("com.microsoft.jdbc.sqlserver.SQLServerDriver");
Connection cn = DriverManager
.getConnection(

"jdbc:microsoft:sqlserver://127.0.0.1:1433;databasename=qq2",
"sa", "123");
PreparedStatement ps = cn
.prepareStatement("select

username from username where username=? and password=?");
ps.setString(1, u);
ps.setString(2, p);
ResultSet rs = ps.executeQuery();

// 发送确认信息到客户端(7)
OutputStream os = s.getOutputStream();
OutputStreamWriter osw = new

OutputStreamWriter(os);
PrintWriter pw = new PrintWriter(osw, true);

if (rs.next()) {
pw.println("ok");
//将自己的名字发送给HashMap中的其他人

(13)
for(Socket ts : hm.values()){
OutputStream tos =

ts.getOutputStream() ;
OutputStreamWriter tosw = new

OutputStreamWriter(tos) ;
PrintWriter tpw = new

PrintWriter(tosw , true) ;

tpw.println("user%"+u) ;
}
//将其他人的名字发送给自己(13)
for(String tu : hm.keySet()){
pw.println("user%"+tu) ;
}
//将用户名和对应的Socket存入HashMap

(13)
hm.put(u, s) ;

// 接收客户端发送来的信息(11)
while (true) {
String message = br.readLine

();

if(message.equals("exit")){
for(Socket ts :

hm.values()){
OutputStream

tos = ts.getOutputStream() ;

OutputStreamWriter tosw = new OutputStreamWriter(tos) ;
PrintWriter

tpw = new PrintWriter(tosw , true) ;

tpw.println

("exit%"+u);
}
hm.remove(u);
}
String to = message.split

("%")[0];
String mess = message.split

("%")[1];

Socket ts = hm.get(to);

OutputStream tos =

ts.getOutputStream();
OutputStreamWriter tosw = new

OutputStreamWriter(tos);
PrintWriter tpw = new

PrintWriter(tosw, true);

tpw.println("mess%"+mess

+"\n");
System.out.println(message);
}
} else {
pw.println("err");
}
} catch (Exception e) {}
}
}

Answer 2

我倒是有简单的QQ和聊天室，比较基础的那种，刚学的时候写的，如果需要的话，留一下邮箱或QQ

追问

那麻烦你发给我下，920421387@qq.com,谢谢了

Answer 3

0分 让人帮你写········