Cookie与Session之（登录验证码与记住我 示例）
2020-02-02 13:59
281 查看
1 package com.ajax.entity;
2 //需要bootstrap，
3 import java.io.Serializable;
4 import java.util.Date;
5
6 public class Student implements Serializable {
7 private Integer stuId;//int(5) NOT NULL学生id，主键
8 private String stuName;//varchar(30) NOT NULL学生姓名
9 private String pwd;//varchar(255) NULL密码
10 private Integer stuAge;//int(11) NOT NULL学生年龄
11 private String stuAddr;//varchar(255) NULL学生的住址
12 private String likes;//varchar(255) NULL学生爱好
13 private String stuSex;//char(3) NOT NULL学生性别
14 private String degree;//varchar(50) NULL学生学历
15 private Integer rid;//int(4) NOT NULL关联的角色id
16 private Date createdate;//date NULL创建日期
17 private Date lastmodigydate;//date NULL最后一次修改日期
18
19 @Override
20 public String toString() {
21 return "Student{" +
22 "stuId=" + stuId +
23 ", stuName='" + stuName + '\'' +
24 ", pwd='" + pwd + '\'' +
25 ", stuAge=" + stuAge +
26 ", stuAddr='" + stuAddr + '\'' +
27 ", likes='" + likes + '\'' +
28 ", stuSex='" + stuSex + '\'' +
29 ", degree='" + degree + '\'' +
30 ", rid=" + rid +
31 ", createdate=" + createdate +
32 ", lastmodigydate=" + lastmodigydate +
33 '}';
34 }
35
36 public Integer getStuId() {
37 return stuId;
38 }
39
40 public void setStuId(Integer stuId) {
41 this.stuId = stuId;
42 }
43
44 public String getStuName() {
45 return stuName;
46 }
47
48 public void setStuName(String stuName) {
49 this.stuName = stuName;
50 }
51
52 public String getPwd() {
53 return pwd;
54 }
55
56 public void setPwd(String pwd) {
57 this.pwd = pwd;
58 }
59
60 public Integer getStuAge() {
61 return stuAge;
62 }
63
64 public void setStuAge(Integer stuAge) {
65 this.stuAge = stuAge;
66 }
67
68 public String getStuAddr() {
69 return stuAddr;
70 }
71
72 public void setStuAddr(String stuAddr) {
73 this.stuAddr = stuAddr;
74 }
75
76 public String getLikes() {
77 return likes;
78 }
79
80 public void setLikes(String likes) {
81 this.likes = likes;
82 }
83
84 public String getStuSex() {
85 return stuSex;
86 }
87
88 public void setStuSex(String stuSex) {
89 this.stuSex = stuSex;
90 }
91
92 public String getDegree() {
93 return degree;
94 }
95
96 public void setDegree(String degree) {
97 this.degree = degree;
98 }
99
100 public Integer getRid() {
101 return rid;
102 }
103
104 public void setRid(Integer rid) {
105 this.rid = rid;
106 }
107
108 public Date getCreatedate() {
109 return createdate;
110 }
111
112 public void setCreatedate(Date createdate) {
113 this.createdate = createdate;
114 }
115
116 public Date getLastmodigydate() {
117 return lastmodigydate;
118 }
119
120 public void setLastmodigydate(Date lastmodigydate) {
121 this.lastmodigydate = lastmodigydate;
122 }
123
124 public Student() {
125 }
126
127 public Student(Integer stuId, String stuName, String pwd, Integer stuAge, String stuAddr, String likes, String stuSex, String degree, Integer rid, Date createdate, Date lastmodigydate) {
128 this.stuId = stuId;
129 this.stuName = stuName;
130 this.pwd = pwd;
131 this.stuAge = stuAge;
132 this.stuAddr = stuAddr;
133 this.likes = likes;
134 this.stuSex = stuSex;
135 this.degree = degree;
136 this.rid = rid;
137 this.createdate = createdate;
138 this.lastmodigydate = lastmodigydate;
139 }
140 }
1 package com.ajax.dao;
2
3 import com.ajax.entity.Student;
4 import com.ajax.util.DataUtil;
5 import org.apache.commons.dbutils.QueryRunner;
6 import org.apache.commons.dbutils.handlers.BeanHandler;
7
8 import java.sql.SQLException;
9
10 public class StudentDao {
11
12 private QueryRunner runner = new QueryRunner(DataUtil.getDataSource());
13
14 public Student findStudentByName(String name){
15 try {
16 return runner.query("select * from tblstudent where stuName = ?",new BeanHandler<>(Student.class),name);
17 } catch (SQLException e) {
18 e.printStackTrace();
19 throw new RuntimeException("findStudentByName出现异常");
20 }
21 }
22
23 public int doAddStudent(String name,String pwd){
24 try {
25 return runner.update("insert into tblstudent(stuName,pwd)values(?,?)",name,pwd);
26 } catch (SQLException e) {
27 e.printStackTrace();
28 throw new RuntimeException("doAddStudent出现异常");
29 }
30 }
31
32 }
1 package com.ajax.servlet;
2
3 import com.ajax.dao.StudentDao;
4 import com.ajax.entity.Student;
5
6 import javax.imageio.ImageIO;
7 import javax.servlet.ServletException;
8 import javax.servlet.annotation.WebServlet;
9 import javax.servlet.http.HttpServlet;
10 import javax.servlet.http.HttpServletRequest;
11 import javax.servlet.http.HttpServletResponse;
12 import javax.servlet.http.HttpSession;
13 import java.awt.*;
14 import java.awt.image.BufferedImage;
15 import java.io.IOException;
16 import java.io.PrintWriter;
17 import java.util.Random;
18
19 @WebServlet("/check")
20 public class CheckServlet extends HttpServlet {
21
22 private StudentDao sd = new StudentDao();
23
24 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
25 doGet(request,response);
26 }
27
28 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
29 String check = request.getParameter("check");
30 if ("username".equals(check)){
31 checkName(request, response);
32 }else if ("code".equals(check)){//生成验证码图片
33 checkCode(request,response);
34 }else if ("checkcode".equals(check)){// /check?check=checkcode&codename
35 checkcodevalue(request,response);
36 }else if ("add".equals(check)){
37 addStudent(request,response);
38 }
39 }
40
41 private void addStudent(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
42 String name = request.getParameter("vname");
43 String pwd = request.getParameter("vpwd");
44 // PrintWriter out = response.getWriter();
45 if (name != null && pwd != null){
46 int i = sd.doAddStudent(name, pwd);
47 // out.print(i);
48 }
49 // out.close();
50 // response.sendRedirect("/jsp/Login.jsp");
51 request.getRequestDispatcher("/jsp/Login.jsp").forward(request,response);
52 }
53
54 private void checkcodevalue(HttpServletRequest request, HttpServletResponse response) throws IOException {
55 String codevalue = request.getParameter("codename");
56 HttpSession session = request.getSession();
57 //从session中拿到验证码图片，
58 String codeimg = (String) session.getAttribute("code");
59 PrintWriter out = response.getWriter();
60 boolean iscode = false;
61 if (codevalue.equalsIgnoreCase(codeimg)){
62 iscode = true;
63 }
64 out.print(iscode);
65 out.close();
66 }
67
68 /**
69 * 生成验证码图片
70 * @param request
71 * @param response
72 * @throws IOException
73 */
74 private void checkCode(HttpServletRequest request, HttpServletResponse response) throws IOException {
75 //get请求；
76 // 创建画布
77 int width = 120;
78 int height = 40;
79 BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
80 // 获得画笔
81 Graphics g = bufferedImage.getGraphics();
82 // 填充背景颜色
83 g.setColor(Color.white);
84 g.fillRect(0, 0, width, height);
85 // 绘制边框
86 g.setColor(Color.red);
87 g.drawRect(0, 0, width - 1, height - 1);
88 // 生成随机字符
89 // 准备数据
90 String data = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890";
91 // 准备随机对象
92 Random r = new Random();
93 // 声明一个变量 保存验证码
94 String code = "";
95 // 书写4个随机字符
96 for (int i = 0; i < 4; i++) {
97 // 设置字体
98 g.setFont(new Font("宋体", Font.BOLD, 28));
99 // 设置随机颜色
100 g.setColor(new Color(r.nextInt(255), r.nextInt(255), r.nextInt(255)));
101 String str = data.charAt(r.nextInt(data.length())) + "";
102 g.drawString(str, 10 + i * 28, 30);
103 // 将新的字符 保存到验证码中
104 code = code + str;
105 }
106 // 绘制干扰线
107 for (int i = 0; i < 6; i++) {
108 // 设置随机颜色
109 g.setColor(new Color(r.nextInt(255), r.nextInt(255), r.nextInt(255)));
110 g.drawLine(r.nextInt(width), r.nextInt(height), r.nextInt(width), r.nextInt(height));
111 }
112 // 将验证码 打印到控制台
113 // 将验证码放到session中
114 request.getSession().setAttribute("code", code);
115 // 将画布显示在浏览器中
116 ImageIO.write(bufferedImage, "jpg", response.getOutputStream());
117 }
118
119 /**
120 * 检查用户名
121 * @param request
122 * @param response
123 * @throws IOException
124 */
125 private void checkName(HttpServletRequest request, HttpServletResponse response) throws IOException {
126 Student student = sd.findStudentByName(request.getParameter("name"));
127 //通过响应对象，输出信息
128 PrintWriter out = response.getWriter();
129 String msg = "0";//存在不可以注册
130 if (student==null){
131 msg = "1";
132 }
133 out.print(msg);
134 out.close();
135 }
136
137
138
139 }
1 package com.ajax.util;
2
3 import com.mchange.v2.c3p0.ComboPooledDataSource;
4
5 import javax.sql.DataSource;
6 import java.sql.Connection;
7 import java.sql.SQLException;
8
9 public class DataUtil {
10 private static ComboPooledDataSource dataSource = new ComboPooledDataSource("mysql");
11 public static Connection getConnection(){
12 try {
13 return dataSource.getConnection();
14 } catch (SQLException e) {
15 e.printStackTrace();
16 throw new RuntimeException("获取连接对象Connection异常。。。");
17 }
18 }
19 public static DataSource getDataSource(){
20 return dataSource;
21 }
22
23 public static void closeConnection(Connection con){
24 if (con!=null){
25 try {
26 con.close();
27 } catch (SQLException e) {
28 e.printStackTrace();
29 }
30 }
31 }
32 }
1 <%--
2 Created by IntelliJ IDEA.
3 User: Administrator
4 Date: 2019/8/30
5 Time: 12:25
6 To change this template use File | Settings | File Templates.
7 --%>
8 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
9 <html>
10 <head>
11 <title>注册（验证码）页面</title>
12 <link rel="stylesheet" href="../bootstrap/css/bootstrap.min.css">
13 <script src="../bootstrap/js/jquery.min.js"></script>
14 <script src="../bootstrap/js/bootstrap.min.js"></script>
15 </head>
16 <body>
17 <div class="container">
18 <div class="panel panel-primary">
19 <div class="panel panel-heading">
20 <h1>注册页面</h1>
21 </div>
22 <div class="panel-body">
23 <form class="form-horizontal" role="form" action="/check?check=add" method="post"
24 οnsubmit="return checkForm()">
25 <%--οnsubmit="return checkForm()">--%>
26 <div class="form-group">
27 <label for="uname" class="col-sm-3 control-label">姓名</label>
28 <div class="col-sm-4">
29 <input type="text" class="form-control" id="uname" name="uname" placeholder="请输入用户名。。。">
30 </div>
31 <%--<div class="span col-md-5"></div>--%>
32 <div class="span col-md-5" id="s1"></div>
33 </div>
34 <div class="form-group">
35 <label for="upwd" class="col-sm-3 control-label">密码</label>
36 <div class="col-sm-4">
37 <input type="password" class="form-control" id="upwd" placeholder="请输入用户密码。。。">
38 </div>
39 <%--<div class="span col-md-5"></div>--%>
40 <div class="span col-md-5" id="s2"></div>
41 </div>
42 <div class="form-group">
43 <label for="code" class="col-sm-3 control-label">验证码</label>
44 <div class="col-sm-3">
45 <input type="text" class="form-control" id="code" placeholder="请输入验证码。。。。">
46 </div>
47 <%--验证码--%>
48 <div class="col-md-2"><img src="/check?check=code" style="cursor: pointer;"></div>
49 <div class="span"></div>
50 </div>
51 <div class="form-group">
52 <div class="col-sm-offset-5 col-sm-6">
53 <button type="submit" id="id_btn" class="btn btn-default">提交注册</button>
54 </div>
55 </div>
56 </form>
57 </div>
58 <div class="panel-footer text-center">
59 李某人为您服务
60 </div>
61 </div>
62 </div>
63 </body>
64 <script>
65 $(function () {
66 //验证码图片点击事件
67 $("img").click(function () {
68 $(this).attr("src", "/check?check=code&time=" + (new Date()));
69 /*加上时间戳（单击时）才生效*/
70 });
71
72 //验证表单中的数据是否有效// 使用ajax进行验证
73 $("#uname").blur(function () {//失去焦点时触发ajax
74 var vname = $(this).val();
75 if (vname == "" || vname == null || vname == undefined) {
76 $(".span:eq(0)").text("用户名不能为空");
77 } else {
78 //参数为：url、参数、回调函数(返回的信息数据)、返回数据类型(txt、json、xml。。。)
79 $.post("/check?check=username", "name=" + vname, function (data) {
80 if (data == 1) {
81 $(".span:eq(0)").text("");
82
83 var span3 = $(".span:eq(2)").text();
84 if (span3 == "") {
85 $("#id_btn").attr("disabled", false); //禁用提交 按钮！
86 } else {
87 $("#id_btn").attr("disabled", true); //禁用提交 按钮！
88 }
89 } else {
90 $(".span:eq(0)").text("姓名重复");
91 $("#id_btn").attr("disabled", true); //禁用提交 按钮！
92 }
93 // $(".span:eq(0)").text(data==1?"姓名OK":"姓名无效");
94 }, "text");
95 }
96 });
97
98 //密码失去焦点
99 $("#upwd").blur(function () {//失去焦点时触发ajax
100 var vpwd = $(this).val();
101 if (vpwd == "" || vpwd == null || vpwd == undefined) {
102 $(".span:eq(1)").text("密码不能为空");
103 } else {
104 $(".span:eq(1)").text("");
105 }
106 });
107
108 //验证码失去光标事件，不能为空与进行匹配时间
109 $("#code").blur(function () {
110 var vcode = $(this).val();
111 if (vcode == "" || vcode == null || vcode == undefined) {
112 $(".span:eq(2)").text("验证码不能为空");
113 } else {
114 //进行验证码判断,使用ajax进行一步判断
115 //使用ajax的get方式，参数：url包含参数，回调函数（返回的数据）、返回的数据类型
116 $.get("/check?check=checkcode&codename=" + vcode, function (data) {
117 if (data == "false") {
118 $(".span:eq(2)").text("验证码错误");
119 $("#id_btn").attr("disabled", true); //禁用提交 按钮！
120 } else {
121 $(".span:eq(2)").text("");
122 var span1 = $(".span:eq(0)").text();
123 if ((span1 == "")) {
124 $("#id_btn").attr("disabled", false); //禁用提交 按钮！
125 } else {
126 $("#id_btn").attr("disabled", true); //禁用提交 按钮！
127 }
128 }
129 // $(".span:eq(2)").text(data=="false"?"验证码错误":"OK");
130 }, "text");
131 }
132 });
133
134 });
135
136 /**
137 * 验证码不能为空
138 * */
139 function cm() {
140 var vcode = $("#code").val();
141 if (vcode == "" || vcode == null || vcode == undefined) {
142 $(".span:eq(2)").text("验证码不能为空");
143 return false;
144 } else {
145 $(".span:eq(2)").text("");
146 return true;
147 }
148 }
149
150 /*
151 * 密码不能为空
152 * */
153 function bm() {
154 var vpwd = $("#upwd").val();
155 if (vpwd == "" || vpwd == null || vpwd == undefined) {
156 $(".span:eq(1)").text("密码不能为空");
157 return false;
158 } else {
159 $(".span:eq(1)").text("");
160 return true;
161 }
162 }
163
164 /**
165 * 用户名不能为空
166 */
167 function am() {
168 var vname = $("#uname").val();
169 if (vname == "" || vname == null || vname == undefined) {
170 $(".span:eq(0)").text("用户名不能为空");
171 return false;
172 } else {
173 $(".span:eq(0)").text("");
174 return true;
175 }
176 }
177
178 function checkForm() {
179 var a = am();
180 var b = bm();
181 var c = cm();
182 var r = a & b & c;
183 alert(r);
184 return r > 0;
185 }
186 </script>
187 </html>
转载于:https://www.cnblogs.com/in-the-game-of-thrones/p/11451213.html
- 点赞
- 收藏
- 分享
- 文章举报
baizaimen0393
发布了0 篇原创文章 · 获赞 0 · 访问量 98
私信
关注
内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理 
相关文章推荐
- cookie、session及实现记住密码，自动登录
- session、cookie与“记住我的登录状态”的功能的实现
- cookie、session及实现记住密码，自动登录
- Cookie、Session实现“记住登录状态”的原理
- cookie、session及实现记住密码，自动登录
- cookie、session及实现记住密码，自动登录
- session、cookie与“记住我的登录状态”的功能的实现
- session、cookie与“记住我的登录状态”的功能的实现
- Session、Cookie 记住登录状态的实现
- session、cookie与“记住我的登录状态”的功能的实现
- session、cookie与“记住我的登录状态”的功能的实现
- cookie、session及实现记住密码，自动登录
- WEB-11-JSP概述-1-会话/cookie/session/Ajax-记住密码/登录
- 登录时记住密码——Filter、Cookie和Session的简单应用
- JavaWeb学习记录总结（二十九）--Servlet\Session\Cookie\Filter实现自动登录和记住密码
- Python Selenium Cookie 绕过验证码实现登录示例代码
- session、cookie与“记住我的登录状态”的功能的实现
- 【JavaWeb-7】Cookie记住用户名、历史浏览记录与Session的自动系列化、购物车案例、验证码使用
- javaWeb的session和cookie实现记住密码自动登录功能简单实例
- （转）session、cookie与“记住我的登录状态”的功能的实现