这是源代码
服务器
package Supermarket;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class Server extends Thread{
public static void main(String[] args) {
ServerSocket socket = null;
Socket s =null;
InputStream is = null;
ObjectInputStream ois =null;
OutputStream os = null;
ObjectOutputStream oos = null;
Goods goods = new Goods();
try {
//创建客户端
//接受
while(true){
socket = new ServerSocket(8000);
s=socket.accept();
is=s.getInputStream();
ois= new ObjectInputStream(is);
//获取客户端的请求
Datas datas=(Datas)ois.readObject();
String role=goods.denglu(datas.getUserName(), datas.getPassWord());
datas.setRole(role);
oos= new ObjectOutputStream(s.getOutputStream());
oos.writeObject(datas);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
}
}
}

这是客户端
package Supermarket;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;
public class Sockets {
public static void main(String[] args) {
System.out.println("****欢迎光临****");
System.out.println("1.登陆");
System.out.println("2.退出系统");
Scanner input = new Scanner (System.in);
String p = input.next();
User user = new User();
if(p.equals("1")){
System.out.println("请输入账号");
String name = input.next();
System.out.println("请输入密码");
String pwd = input.next();
user.setUserName(name);
user.setUserPwd(pwd);
Socket socket =null;
OutputStream os =null;
ObjectOutputStream oos = null;
ObjectInputStream ois = null;
try {
//创建客户端
socket= new Socket("localhost",8000);
//像服务器发送
os= socket.getOutputStream();
oos = new ObjectOutputStream(os);
oos.writeObject(user);
ois = new ObjectInputStream(socket.getInputStream());
Datas datas=(Datas)ois.readObject();
if(datas.getRole()==null){
System.out.println("帐户名或密码错误");
}else{
System.out.println("登陆成功");
}
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
try {
if(ois!=null)
ois.close();
if(oos!=null)
oos.close();
if(socket!=null)
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}else{
System.out.println("退出成功");
}
}
}

相关对象
package Supermarket;
import java.io.Serializable;
public class User implements Serializable{
private String userName;
private String userPwd;
private String role;
public User() {
super();
// TODO Auto-generated constructor stub
}
public User(String userName, String userPwd, String role) {
super();
this.userName = userName;
this.userPwd = userPwd;
this.role = role;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getUserPwd() {
return userPwd;
}
public void setUserPwd(String userPwd) {
this.userPwd = userPwd;
}
public String getRole() {
return role;
}
public void setRole(String role) {
this.role = role;
}
}

public class Datas implements Serializable {
private String flag;// 传递的标识
private String role;//用户用色
private String userName;//用户名
private String passWord;//密码
private Datasdatas;//商品对象
private List<Manage>manList; //商品对象
public String getFlag() {
return flag;
}
public void setFlag(String flag) {
this.flag = flag;
}
public String getRole() {
return role;
}
public void setRole(String role) {
this.role = role;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassWord() {
return passWord;
}
public void setPassWord(String passWord) {
this.passWord = passWord;
}
public Datas getDatas() {
return datas;
}
public void setDatas(Datas datas) {
this.datas = datas;
}
public List<Manage> getManList() {
return manList;
}
public void setManList(List<Manage> manList) {
this.manList = manList;
}
}

package Supermarket;
import java.util.HashMap;
import java.util.Map;
public class Goods {
public static Map<String,Manage>manageMap;
public static Map<String,User>userMap;
public static void make(){
manageMap= new HashMap<String,Manage>();
Manage manage1 = new Manage("1001","吉百家芝麻油",9.50,"125ml",20);
Manage manage2 = new Manage("1002","雀巢咖啡",1.50,"13g",200);
Manage manage3 = new Manage("1003","脉动水蜜桃",7.00,"1.5l",50);
Manage manage4 = new Manage("1004","旺仔QQ糖",2.50,"70g",70);
Manage manage5 = new Manage("1005","桃李醇熟切片",6.50,"400g",10);
Manage manage6 = new Manage("1006","白玉黄豆芽",2.40,"350g",20);
Manage manage7 = new Manage("1007","白玉内酯豆腐",1.00,"400g",15);
Manage manage8 = new Manage("1008","吉百家芝麻油",9.50,"125ml",20);
manageMap.put(manage1.getCode(), manage1);
manageMap.put(manage2.getCode(), manage2);
manageMap.put(manage3.getCode(), manage3);
manageMap.put(manage4.getCode(), manage4);
manageMap.put(manage5.getCode(), manage5);
manageMap.put(manage6.getCode(), manage6);
manageMap.put(manage7.getCode(), manage7);
manageMap.put(manage8.getCode(), manage8);
userMap=new HashMap<String,User>();
userMap.put("001", new User("001","00001","01"));
userMap.put("002", new User("001","00002","02"));
}
//判断账号和密码
public String denglu(String name,String pwd){
if(userMap.containsKey(name)){
User user= userMap.get(name);
if(user.getUserPwd().equals(pwd)){
return user.getRole();
}
}
return null;
}
}

谢谢

直接tie代码很少有人看