Android二维码扫描登陆网页

Posted 2022-11-21 叶子8324

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1 二维码扫描登陆

1，web端生成二维码,传递uuid，并存入数据库

2，web端轮训查询信息，是否有数据库扫描二维码信息

3，手机端扫描二维码，获取UUID，传递用户名、密码web端

4，web查询数据库中用户信息（UserLogin），将登陆信息（用户名，密码）存入数据库。

5，web轮训查到用户登陆信息，信息完整，则登陆成功。

1.1 web端

1.1.1 导入依赖包（二维码生成QRCode.jar）

jar包下载： QRCode.jar

1.1.2 用户登陆信息实体类（UserLogin.java）

@Entity
@Table(name = "UserLogin")
public class UserLogin 
	@Id
	@GeneratedValue(generator = "UserLoginIdGenerator")
	@GenericGenerator(name = "UserLoginIdGenerator", strategy = "uuid")
	private String id;
	@Column
	private String name;
	@Column
	private String password;
	@Column
	private int uuid;

	public String getId() 
		return id;
	

	public void setId(String id) 
		this.id = id;
	

	public int getUuid() 
		return uuid;
	

	public void setUuid(int uuid) 
		this.uuid = uuid;
	

	public String getName() 
		return name;
	

	public void setName(String name) 
		this.name = name;
	

	public String getPassword() 
		return password;
	

	public void setPassword(String password) 
		this.password = password;

1.1.3 生成二维码(GetQrCodeServlet.java)

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.engine.transaction.jta.platform.internal.JOnASJtaPlatform;

import sun.org.mozilla.javascript.internal.json.JsonParser;

import com.alibaba.fastjson.JSONObject;
import com.jie.qrcode.util.HibernateUtil;
import com.jie.qrcode.util.QRCodeUtil;
import com.jie.qrcode.vo.UserLogin;

/**
 * @ClassName: GetQrCodeServlet.java
 * @Description: TODO(生成二维码)
 * @author yangjie
 * @version V1.0
 * @Date 2016-5-16 上午11:05:27
 */
public class GetQrCodeServlet extends HttpServlet 
	private static final long serialVersionUID = 1L;

	protected void doGet(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException 
		doPost(request, response);
	

	protected void doPost(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException 
		PrintWriter out = response.getWriter();

		// 生成唯一ID
		int uuid = (int) (Math.random() * 100000);
		// 二维码内容
		// String content =
		// "http://192.168.0.199:8080/QrCodeLogin/PhoneLoginServlet?uuid="
		// + uuid;
		JSONObject obj = new JSONObject();
		obj.put("url",
				"http://192.168.0.199:8080/QrCodeLogin/PhoneLoginServlet");
		obj.put("uuid", uuid);
		String content = obj.toString();
		System.out.println("obj:" + content);
		// 生成二维码
		String imgName = uuid + "_" + (int) (new Date().getTime() / 1000)
				+ ".png";
		String contextRoot = request.getContextPath();
		String webpath = request.getSession().getServletContext()
				.getRealPath("/");
		System.out.println(webpath);
		String imgPath = webpath + "/img/qrCodeImg/" + imgName;
		String logoPath = webpath + "/img/logo.png";
		QRCodeUtil handler = new QRCodeUtil();
		// handler.encoderQRCode(content, imgPath, "png");
		handler.encoderQRCode(content, imgPath, logoPath, "png");

		// uuid保存
		SessionFactory sf = HibernateUtil.getSessionFacotry();
		Session session = sf.openSession();
		session.beginTransaction();// 事务开始
		UserLogin userlogin = new UserLogin();
		userlogin.setUuid(uuid);
		session.save(userlogin);// 将uuid保存到数据库
		session.getTransaction().commit();// 事务提交
		session.close();
		sf = null;

		// 生成的图片访问地址
		String qrCodeImg = "http://192.168.0.199:8080/QrCodeLogin/img/qrCodeImg/"
				+ imgName;
		String jsonStr = "\\"uuid\\":" + uuid + ",\\"qrCodeImg\\":\\"" + qrCodeImg
				+ "\\"";
		out.print(jsonStr);
		out.flush();
		out.close();

1.1.4 用长连接，检查登录状态(LongConnectionCheckServlet.java)

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.Restrictions;

import com.jie.qrcode.util.HibernateUtil;
import com.jie.qrcode.vo.UserLogin;

/**
 * @ClassName:     LongConnectionCheckServlet.java
 * @Description:   TODO(用长连接，检查登录状态) 
 * @author         yangjie
 * @version        V1.0  
 * @Date           2016-5-16 上午11:09:32
 */
public class LongConnectionCheckServlet extends HttpServlet 
	private static final long serialVersionUID = 1L;

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException 
		doPost(request, response);
	

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException 
		int uuid = Integer.parseInt(request.getParameter("uuid"));
		String jsonStr = "";
		System.out.println("in");
		System.out.println("uuid:" + uuid);
		long inTime = new Date().getTime();
		Boolean bool = true;
		while (bool) 
			try 
				Thread.sleep(5000);
			 catch (InterruptedException e) 
				e.printStackTrace();
			
			// 根据uuid查询数据库登录表信息
			String username = "";
			SessionFactory sf = HibernateUtil.getSessionFacotry();
			Session session = sf.openSession();
			Criteria criteria = session.createCriteria(UserLogin.class);
			criteria.add(Restrictions.eq("uuid", uuid));
			List<UserLogin> result = criteria.list();
			if (result.size() > 0) 
				for (UserLogin s : result) 
					username = s.getName();
					if(!"".equals(username)&&username!=null)//如果用户名信息不为空，则登陆成功
						bool = false;
						session.clear();
						session.beginTransaction();
						session.delete(s);//删除二维码登录信息，表明已登录
						session.getTransaction().commit();
					
					jsonStr = "\\"uname\\":\\"" + username + "\\"";
					System.out.println(username);
				
			 else 
				if (new Date().getTime() - inTime > 5000) 
					bool = false;
				
			
			session.close();
			sf = null;

		
		System.out.println("login ok : " + jsonStr);
		PrintWriter out = response.getWriter();
		out.print(jsonStr);
		out.flush();
		out.close();

1.1.5 接收手机二维码回传信息(PhoneLoginServlet.java)

import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.Restrictions;

import com.jie.qrcode.util.HibernateUtil;
import com.jie.qrcode.vo.UserLogin;


/**
 * @ClassName:     PhoneLoginServlet.java
 * @Description:   TODO(手机二维码登陆) 
 * @author         yangjie
 * @version        V1.0  
 * @Date           2016-5-16 上午11:20:16
 */
public class PhoneLoginServlet extends HttpServlet 
	private static final long serialVersionUID = 1L;

	public PhoneLoginServlet() 
		super();
		// TODO Auto-generated constructor stub
	

	protected void doGet(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException 
		doPost(request, response);
	

	protected void doPost(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException 
		int uuid = Integer.parseInt(request.getParameter("uuid"));
		String uname = request.getParameter("uname");
		String upwd = request.getParameter("upwd");
		System.out.println(uuid);
		System.out.println(uname);
		System.out.println(upwd);
		// 验证登陆
		boolean bool = true;
		//是否登陆
		boolean islogin = false;
		if (bool) 
			// 将登陆信息存入数据库
			SessionFactory sf = HibernateUtil.getSessionFacotry();
			Session session = sf.openSession();
			Criteria criteria = session.createCriteria(UserLogin.class);
			criteria.add(Restrictions.eq("uuid", uuid));
			List<UserLogin> result = criteria.list();
			if (result.size() > 0) 
				for (UserLogin s : result) 
					s.setName(uname);
					s.setPassword(upwd);
					session.clear();
					session.beginTransaction();//开始事务
					session.saveOrUpdate(s);
					session.getTransaction().commit();// 事务提交
					bool = false;
					islogin = true;
				
			else//没有该uuid信息，表明已登录，二维码过期
				islogin = false;
				System.out.println("二维码已过期，请刷新页面");
			
			session.close();
			sf = null;
		
		PrintWriter out = response.getWriter();
		out.print(islogin);//传递登陆是否成功
		out.flush();
		out.close();

1.1.6 二维码扫描界面(index.html)

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<script type="text/javascript" src="js/jquery-1.11.0.min.js"></script>
<style>
.div-content
	text-align: center;
	

.img 
	margin-top: 150px;

.div-content-text
	text-align: center;
	margin-top: 20px;
	font-size: 36px;
	color: blue;

</style>
<body>
	<div id="divCon" class="div-content">
		<img src="" id="QrCodeImg" class="img" />
		<div class="div-content-text">扫描二维码登陆</div>
	</div>
</body>
<script type="text/javascript">
	$(document).ready(
			function() 
				var uuid;
				$.get("GetQrCodeServlet", function(data, status) 
					var obj = eval("(" + data + ")");
					//存储UUID
					uuid = obj.uuid;
					//显示二维码
					$("#QrCodeImg").attr("src", obj.qrCodeImg);
					//开始验证登录
					validateLogin();
				);

				function validateLogin() 
					$.get("LongConnectionCheckServlet?uuid=" + uuid, function(
							data, status) 
						if (data == "") 
							validateLogin();
						 else 
							var obj = eval("(" + data + ")");
							alert("登录成功了:" + obj.uname);
							window.location.href = "home.html";
						
					);
				
			);
</script>
</html>

1.1.7 运行效果

1.2 手机端

1.2.1 导入依赖工程BarCodeLibrary

工程下载： Android二维码扫描

1.2.2 创建工程并引入依赖包

1.2.3 手机二维码界面(activity_main.xml)

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:gravity="center" >

    <Button
        android:id="@+id/btn_scan"
        android:layout_width="120dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:gravity="center"
        android:background="@android:color/holo_blue_light"
        android:textColor="@android:color/white"
        android:text="扫码登录" />

</LinearLayout>

1.2.4 MainActivity.java

package com.jie.qrcode;


import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

import com.alibaba.fastjson.JSONObject;
import com.lidroid.xutils.HttpUtils;
import com.lidroid.xutils.exception.HttpException;
import com.lidroid.xutils.http.RequestParams;
import com.lidroid.xutils.http.ResponseInfo;
import com.lidroid.xutils.http.callback.RequestCallBack;
import com.lidroid.xutils.http.client.HttpRequest;
import com.lidroid.xutils.http.client.HttpRequest.HttpMethod;
import com.zxing.activity.CaptureActivity;

public class MainActivity extends Activity implements OnClickListener
	private Button btnScan;
	@Override
	protected void onCreate(Bundle savedInstanceState) 
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		btnScan = (Button) findViewById(R.id.btn_scan);
		btnScan.setOnClickListener(this);
		
	

	
	@Override
	public void onClick(View v) 
		// TODO Auto-generated method stub
		Intent intent = new Intent(this, CaptureActivity.class);
		startActivityForResult(intent, 0);
	
	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) 
		// TODO Auto-generated method stub
		super.onActivityResult(requestCode, resultCode, data);
		if(resultCode==Activity.RESULT_OK)
			String result = data.getExtras().getString("result");//获取扫描的结果
			//Log.i("result",result);
			JSONObject obj = JSONObject.parseObject(result);
			String uuid = obj.getString("uuid");
			String httpUrl = obj.getString("url");
			//Toast.makeText(getApplicationContext(), result, 1000).show();
			//将扫描内容提交到网页
			HttpUtils http = new HttpUtils();
			RequestParams params = new RequestParams();
			params.addBodyParameter("uuid", uuid);
			//Log.i("uuid",uuid);
			params.addBodyParameter("uname", "yangjie");
			params.addBodyParameter("upwd", "123456");
			http.send(HttpMethod.POST, httpUrl, params , new RequestCallBack<String>() 

				@Override
				public void onFailure(HttpException arg0, String arg1) 
					// TODO Auto-generated method stub
					Log.i("http.send","failuer");
					Toast.makeText(getApplicationContext(), "登陆失败，二维码过期，请刷新页面！", 1000).show();
				

				@Override
				public void onSuccess(ResponseInfo<String> arg0) 
					// TODO Auto-generated method stub
					Log.i("http.send","success");
					Toast.makeText(getApplicationContext(), "登陆成功！", 1000).show();
				
			);

1.2.5 运行效果

1.3 完整工程源码请点击下载：二维码扫描登陆-完善

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