题目要求：
1登录账号：要求由6到12位字母、数字、下划线组成，只有字母可以开头；（1分）
2登录密码：要求显示“• ”或“*”表示输入位数，密码要求八位以上字母、数字组成。（1分）
3性别：要求用单选框或下拉框实现，选项只有“男”或“女”；（1分）
4学号：要求八位数字组成，前四位为“2018”开头，输入自己学号；（1分）
5姓名：输入自己的姓名；
5电子邮箱：要求判断正确格式xxxx@xxxx.xxxx；（1分）
6点击“添加”按钮，将学生个人信息存储到数据库中。（3分）
7可以演示连接上数据库。（2分）
com.Bean
1 public class User { 2 private String username; 3 private String password; 4 private String name; 5 private String studentID; 6 private String sex; 7 private String phone; 8 private String email; 9 private String xueyuan; 10 private String xi; 11 private String classes; 12 private String year; 13 private String shengyuandi; 14 private String beizhu; 15 public String getUsername() { 16 return username; 17 } 18 public void setUsername(String username) { 19 this.username = username; 20 } 21 public String getPassword() { 22 return password; 23 } 24 public void setPassword(String password) { 25 this.password = password; 26 } 27 public String getName() { 28 return name; 29 } 30 public void setName(String name) { 31 this.name = name; 32 } 33 public String getStudentID() { 34 return studentID; 35 } 36 public void setStudentID(String studentID) { 37 this.studentID = studentID; 38 } 39 public String getSex() { 40 return sex; 41 } 42 public void setSex(String sex) { 43 this.sex = sex; 44 } 45 public String getPhone() { 46 return phone; 47 } 48 public void setPhone(String phone) { 49 this.phone = phone; 50 } 51 public String getEmail() { 52 return email; 53 } 54 public void setEmail(String email) { 55 this.email = email; 56 } 57 public String getXueyuan() { 58 return xueyuan; 59 } 60 public void setXueyuan(String xueyuan) { 61 this.xueyuan = xueyuan; 62 } 63 public String getXi() { 64 return xi; 65 } 66 public void setXi(String xi) { 67 this.xi = xi; 68 } 69 public String getClasses() { 70 return classes; 71 } 72 public void setClasses(String classes) { 73 this.classes = classes; 74 } 75 public String getYear() { 76 return year; 77 } 78 public void setYear(String year) { 79 this.year = year; 80 } 81 public String getShengyuandi() { 82 return shengyuandi; 83 } 84 public void setShengyuandi(String shengyuandi) { 85 this.shengyuandi = shengyuandi; 86 } 87 public String getBeizhu() { 88 return beizhu; 89 } 90 public void setBeizhu(String beizhu) { 91 this.beizhu = beizhu; 92 } 93 public User(String username, String password, String name, String studentID, String sex, String phone, String email, 94 String xueyuan, String xi, String classes, String year, String shengyuandi, String beizhu) { 95 super(); 96 this.username = username; 97 this.password = password; 98 this.name = name; 99 this.studentID = studentID; 100 this.sex = sex; 101 this.phone = phone; 102 this.email = email; 103 this.xueyuan = xueyuan; 104 this.xi = xi; 105 this.classes = classes; 106 this.year = year; 107 this.shengyuandi = shengyuandi; 108 this.beizhu = beizhu; 109 } 110 111 112 113 }
数据库驱动加载与连接（）
1 package com.DBUtil; 2 3 import java.sql.Connection; 4 5 import java.sql.DriverManager; 6 //import java.sql.ResultSet; 7 import java.sql.SQLException; 8 //import java.sql.Statement; 9 10 public class UserDBUtil { 11 static Connection con; 12 public static Connection getConnection() { 13 try { 14 Class.forName("com.mysql.cj.jdbc.Driver"); 15 System.out.println("数据库驱动加载成功"); 16 } catch (ClassNotFoundException e) { 17 // TODO Auto-generated catch block 18 e.printStackTrace(); 19 } 20 21 try { 22 con=DriverManager.getConnection("jdbc:mysql://localhost:3306/user?useUnicode=true&characterEncoding=utf-8&serverTimezone=GMT%2B88&serverTimezone=GMT%2B8&useSSL=false","root","101032"); 23 System.out.println("数据库链接成功！"); 24 } catch (SQLException e) { 25 // TODO Auto-generated catch block 26 e.printStackTrace(); 27 } 28 29 return con; 30 } 31 32 public static void main(String[] args) { 33 UserDBUtil c=new UserDBUtil(); 34 c.getConnection(); 35 36 }
出现如图所示输出，说明数据库的驱动加载成功，数据库连接成功。
servlet是运行在web服务器或应用服务器的程序,用来处理客户端请求的动态资源.即后台的服务程序
1 package com.Servlet; 2 3 import java.io.IOException; 4 import java.sql.Connection; 5 import java.sql.SQLException; 6 import java.sql.Statement; 7 //import java.util.List; 8 9 import javax.servlet.ServletException; 10 import javax.servlet.http.HttpServlet; 11 import javax.servlet.http.HttpServletRequest; 12 import javax.servlet.http.HttpServletResponse; 13 14 //import com.Bean.*; 15 import com.DBUtil.*; 16 17 public class AddServlet extends HttpServlet { 18 19 private static final long serialVersionUID = 1L; 20 21 protected void service(HttpServletRequest req,HttpServletResponse resp)throws ServletException,IOException { 22 req.setCharacterEncoding("UTF-8"); 23 24 String username = req.getParameter("username"); 25 String password= req.getParameter("password"); 26 String name= req.getParameter("name"); 27 String studnetID = req.getParameter("studnetID"); 28 String sex= req.getParameter("sex"); 29 String phone= req.getParameter("phone"); 30 String email= req.getParameter("email"); 31 String xueyuan = req.getParameter("xueyuan"); 32 String xi = req.getParameter("xi"); 33 String classes = req.getParameter("clsaaes"); 34 String year = req.getParameter("year"); 35 String shengyuandi = req.getParameter("shengyuandi"); 36 String beizhu = req.getParameter("beizhu"); 37 38 Connection conn = UserDBUtil.getConnection(); 39 Statement state =null; 40 String addsql = null; 41 try { 42 state = conn.createStatement(); 43 addsql = "insert into use01 (username,password,name,studnetID,sex,phone,email,xueyuan,xi,clsaaes,year,shengyuandi,beizhu) values ('"+username+"','"+password+"','"+name+"','"+studnetID+"','"+sex+"','"+phone+"','"+email+"','"+xueyuan+"','"+xi+"','"+classes+"','"+year+"','"+shengyuandi+"','"+beizhu+"')"; 44 state.executeUpdate(addsql); 45 conn.close(); 46 } catch (SQLException e) { 47 e.printStackTrace(); 48 } 49 resp.sendRedirect(req.getContextPath()+"/index.jsp"); 50 51 } 52 }
网页的排版编码：
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <!DOCTYPE html> 4 <html> 5 <head> 6 <meta charset="UTF-8"> 7 <title>用户注册</title> 8 </head> 9 <body> 10 11 <script type="text/javascript" src="./js/jquery-3.3.1.min.js"></script> 12 13 <div class="container"> 14 <section> 15 <form action="AddServlet" method="post" onsubmit="return check(this)"> 16 <span class="username">登陆账号</span> 17 <input type="text" name="username" placeholder=" username" id="username"> 18 <br/> 19 20 <span class="password">登陆密码</span> 21 <input type="password" name="password" placeholder=" password" id="password"> 22 <br/> 23 24 <span class="name">姓名</span> 25 <input type="text" name="name" placeholder=" name" id="name"> 26 <br/> 27 28 <span class="studentID">学号</span> 29 <input type="text" name="studentID" placeholder=" studentID" id="studentID" value="2018"> 30 <br/> 31 32 <span class="sex">性别</span> 33 <input type="radio" name="sex" id="sexnan" value="男">男 34 35 <input type="radio" name="sex" id="sexnv" value="女">女 36 <br/> 37 38 <!-- <span class="diqu">地区</span> --> 39 <!-- <select name="diqu"> --> 40 <!-- <option value ="北京市">北京市</option> --> 41 <!-- <option value ="天津市">天津市</option> --> 42 <!-- <option value="河北省">河北省</option> --> 43 <!-- </select> --> 44 <!-- <br/> --> 45 46 <span class="phone">手机号</span> 47 <input type="text" name="phone" placeholder=" phone" id="phone"> 48 <br/> 49 50 <span class="email">邮箱</span> 51 <input type="text" name="email" placeholder=" email" id="email"> 52 <br/> 53 54 <span class="xueyuan">所在学院：</span> 55 <input type="text" name="xueyuan" placeholder=" xueyuan" id="xueyuan"> 56 <br/> 57 58 <span class="xi">所在系：</span> 59 <input type="text" name="xi" placeholder=" suozaixi" id="xi"> 60 <br/> 61 62 <span class="classes">所在班级：</span> 63 <input type="text" name="classes" placeholder=" classes" id="classes"> 64 <br/> 65 66 67 <span class="year">入学年份（届）：</span> 68 <select name="year"> 69 <option value ="2014">2014</option> 70 <option value ="2015">2015</option> 71 <option value ="2016">2016</option> 72 <option value="2017">2017</option> 73 <option value="2018">2018</option> 74 <option value ="2019">2019</option> 75 </select> 76 <br/> 77 78 <span class="shengyuandi">生源地：</span> 79 <input type="text" name="shengyuandi" placeholder=" shengyuandi" id="shengyuandi"> 80 <br/> 81 82 <span class="beizhu">备注：</span> 83 <input type="text" name="beizhu" placeholder=" beizhu" id="beizhu"> 84 <br/> 85 86 <input type="submit" value="保存" class="butn"> 87 <!-- <input type="reset" value="重置" class="butn"> --> 88 <br/> 89 </form> 90 </section> 91 </div> 92 93 <script> 94 //正则表达式 95 function check(form){ 96 97 if(form.username.value.length<6 || form.username.value.length>12 || new RegExp("[^0-9a-zA-Z]").test(form.username.value)){ 98 alert("登陆账号必须由6-12位英文字符或数字组成！"); 99 form.user.focus(); 100 return false; 101 } 102 if(new RegExp("[^a-zA-Z]").test(form.username.value.substring(0,1))){ 103 alert("登陆账号必须以英文字母开头！"); 104 form.user.focus(); 105 return false; 106 } 107 if(form.password.value.length <= 8 || new RegExp("[^0-9a-zA-Z]").test(form.password.value)){ 108 alert("密码必须由八位以上字母、数字组成！"); 109 form.phone.focus(); 110 return false; 111 } 112 if(form.studentID.value.length != 8 || new RegExp("[^0-9]").test(form.studentID.value)){ 113 alert("请输入八位学号！"); 114 form.phone.focus(); 115 return false; 116 } 117 118 if(form.phone.value.length != 11 || new RegExp("[^0-9]").test(form.phone.value)){ 119 alert("手机号请输入11位数字！"); 120 form.phone.focus(); 121 return false; 122 } 123 124 //以数字字母开头，中间可以是多个数字字母或下划线；然后是“@”；然后是数字字母；然后是“.”；最后是2-4个字母结尾 125 var regex = /^([a-zA-Z]|[0-9])(w|-)+@[a-zA-Z0-9]+.([a-zA-Z]{2,4})$/; 126 if(!regex.test(form.email.value)){ 127 alert("邮箱格式错误！"); 128 form.email.focus(); 129 return false; 130 } 131 return true; 132 } 133 </script> 134 135 </body> 136 </html>
网页面板如下：
问题：
当数据输入到界面时，界面跳转失败，无法录入数据到数据库。
错误原因如下：
目前仍旧没由修正。