教你用Java验证服务器登录系统

教你用Java验证服务器登录系统

一、前言

单独写一个这样简易的登录是因为比较方便，由于我尝试了多次在写好的程序内直接写这个登录系统测试，很麻烦、不方便，所以单独写出了这套代码，个人觉得这

样把写好的程序放进去修改就比较方便多了

二、登录系统服务端

import java.io.*;

import java.net.ServerSocket;

import java.net.Socket;

public class ServerLogin {

public static void main(String[]args)throws IOException{

Server();

}

public static void Server()throws IOException{

String name = "AccountPassword.txt";

String path = System.getProperty("user.dir")+"\\"+name;

File file = new File(path);

if (!file.exists()){

BufferedWriter bw = new BufferedWriter(new FileWriter(file.getAbsoluteFile()));

file.createNewFile();

bw.write("1391634154--123456");

bw.newLine();

bw.write("654321--123");

bw.flush();

bw.close();

System.out.println("Server生成账号数据");

}

ServerSocket server = new ServerSocket(8848);

System.out.println("端口开启成功");

Object obj = new Object();

while(true){

Socket accept = server.accept();

new Thread(new Runnable() {

@Override

public void run() {

int A = 0;

boolean ServerStart = false;

boolean WhileThread = true;

int len = 0;

try{

InputStream inputStream = accept.getInputStream();

OutputStream outputStream = accept.getOutputStream();

while(WhileThread){

if (ServerStart==false){

System.out.println("Server=false已经执行");

BufferedReader br = new BufferedReader(new FileReader(file.getAbsoluteFile()));

byte[] bytes = new byte[1024];

len = inputStream.read(bytes);

String User = new String(bytes,0,len);

len = 0;

String Line;

while((Line = br.readLine())!=null){

if (Line.equals(User)){

System.out.println("正确"+Thread.currentThread().getName()+"-->User:"+User);

outputStream.write("true".getBytes());

ServerStart = true;

break;

}

if (!Line.equals(User)){

A++;

System.out.println("失败"+Thread.currentThread().getName()+"-->User:"+User);

outputStream.write("false".getBytes());

break;

}

}

}

if (A==3){

// 结束循环 断开连接

WhileThread = false;

inputStream.close();

outputStream.close();

accept.close();

}

}

}catch(IOException e){

}

}

}).start();

}

}

}

三、登录系统客户端

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.Socket;

import java.util.Scanner;

public class ClienteLogin {

static Scanner sc = new Scanner(System.in);

static String Server = "false";

public static void main(String[]args)throws IOException{

Cliente();

}

public static void Cliente()throws IOException{

int ClienteOff = 0;

System.out.println("ClienteOn");

System.out.print("IP:");

String next = sc.next();

System.out.print("Port:");

int Port = sc.nextInt();

Socket socket = new Socket(next,Port);

InputStream inputStream = socket.getInputStream();

OutputStream outputStream = socket.getOutputStream();

byte[] bytes = new byte[1024];

while(true){

if (ClienteOff == 3){

break;

}

Clhttp://ienteOff++;

if (Server.equals("false")){

System.out.print("账号:");

String User = sc.next();

System.out.print("密码:");

String Password = sc.next();

String AccountPassword = User+"--"+Password;

outputStream.write(AccountPassword.getBytes());

int len = inputStream.read(bytes);

Server = new String(bytes,0,len);

len = 0;

if (Server.equals("false")){

System.out.println("登录失败，账号或密码错误");

}else if (Server.equals("true")){

System.out.println("登录成功");

}

}

}

}

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