原生Java+mysql登錄驗證

client

login.java

功能：實現登錄頁面，與服務端傳來的數據驗證

package LoginRegister;

import java.awt.Container;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.util.regex.Pattern;

import javax.swing.*;

public class Login extends JFrame {

String user;

String pwd;

String struser[] = new String[2];

public Login() {

setBounds(200, 200, 400, 250);

setDefaultCloseOperation(EXIT_ON_CLOSE);

Container c = getContentPane();

c.setLayout(null);

setTitle("登錄");

JLabel jl = new JLabel("username");

jl.setBounds(50, 50, 100, 20);

JLabel j2 = new JLabel("password");

j2.setBounds(50, 100, 100, 20);

JTextField jt = new JTextField();

jt.setBounds(150, 50, 200, 20);

JPasswordField jp = new JPasswordField();

jp.setBounds(150, 100, 200, 20);

JButton btn = new JButton("登錄");

btn.setBounds(150, 150, 100, 30);

c.add(jl);

c.add(jt);

c.add(j2);

c.add(jp);

c.add(btn);

btn.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

user = jt.getText();// 獲取用戶名;

pwd = new String(jp.getPassword());// 獲取、轉換密碼;

if(user!=null&&pwd!=null) {//判斷輸入的值是否完整

String data = SendLogin.sendLoginUser(user, pwd);

Pattern p = Pattern.compile("&");//使用正則表達式，獲取

String[] type = p.split(data);

String conState=type[0];

String exsitsState = type[1];

if(conState.equals("true")&&exsitsState.equals("true")) {

System.out.println("登錄成功！");

}else {

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

System.out.println("服務器連接失敗!");

}

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

System.out.println("帳戶不存在！");

}

}

}else {

System.out.println("請填寫完整!");

}

}

});

}

public static void main(String[] args) {

Login login = new Login();

login.setVisible(true);

login.setResizable(false);// 設置窗體不可改變大小

}

}

SendLogin.java

功能：實現客戶端的數據傳輸給服務端，與服務端交換數據。

package LoginRegister;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.Socket;

import java.net.UnknownHostException;

public class SendLogin {

public static String sendLoginUser(String username, String password) {

String data=null;

try {

Socket client = new Socket("127.0.0.1", 1100);// 連接服務器;

System.out.println("連接成功!");

OutputStream out = client.getOutputStream();

// String message = "服務器你好，我是客戶端";

String strUser[] = new String[2];

strUser[0] = username;

strUser[1] = password;

String user = "username=" + username + "&" + "password=" + password;

out.write(user.getBytes());

InputStream in = client.getInputStream();

byte bt[] = new byte[1024];

int len = in.read(bt);

data = new String(bt, 0, len);

System.out.println("服務器發來消息:" + data);

client.close();// 關閉連接;

} catch (UnknownHostException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

return data;

}

}

server

Server.java

功能：實現與客戶端的數據交互

package com.login.server;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.ServerSocket;

import java.net.Socket;

import java.util.regex.Pattern;

import com.login.mysql.MysqlConnect;

public class Server {

public static void main(String[] args) {

try {

ServerSocket server = new ServerSocket(1100);//創建服務器套接字,開啟1100端口;

System.out.println("服務器啟動成功,等待用戶接入……");

Socket client = server.accept();//等待用戶接入;

InputStream in = client.getInputStream();

byte bt[] = new byte[1024];

int len = in.read(bt);

String data = new String(bt,0,len);

//System.out.println("客戶端發來消息:"+data);

Pattern a = Pattern.compile("&");//使用正則表達式，獲取

String[] type = a.split(data);

Pattern b = Pattern.compile("=");//使用正則表達式，獲取

String[] type2 = b.split(type[0]);

Pattern c = Pattern.compile("=");//使用正則表達式，獲取

String[] type201 = c.split(type[1]);

String username = type2[1];

String password = type201[1];

//System.out.println(username);

//System.out.println(password);

OutputStream out = client.getOutputStream();

String returninfo = MysqlConnect.login(username, password);

//String message = "客戶端你好，我是服務器";

out.write(returninfo.getBytes());

client.close();//關閉連接;

System.out.println("有客戶端接入,客戶端IP:"+client.getInetAddress());//獲取客戶端地址;

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

MysqlConnect.java

功能：連接數據庫，查詢數據

package com.login.mysql;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

public class MysqlConnect {

public static String login(String user,String pwd) {

String userstate = null;

String conState="false";

String infoState="false";

String userDemo = user;

String pwdDemo = pwd;

try {

Class mysql = Class.forName("com.mysql.jdbc.Driver");

Connection con = null; // 連接數據庫的接口;

PreparedStatement state = null;// 發送sql語句

ResultSet rs = null; // 結果集接口;

String url = "jdbc:mysql://localhost:3306/test";

String username = "root";

String password = "123456";

String sql = "SELECT username,password FROM user WHERE username=? and password =?";

con = DriverManager.getConnection(url, username, password);// 連接數據庫;

if(con!=null) {

conState = "true";

}

state = con.prepareStatement(sql);

state.setString(1, userDemo);

state.setString(2, pwdDemo);

rs = state.executeQuery();

String exisit = null;

while(rs.next()) {

exisit =rs.getString(1);//判斷是否有滿足條件的一行

}

if(exisit!=null) {

infoState="true";

}

//System.out.println(exisit);

} catch (ClassNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

userstate = conState+"&"+infoState;

return userstate;

}

}

總結

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