JAVA web课堂测试1
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）
源代码：
数据库的连接与关闭
import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; public class shujuku { //数据库URL和账号密码 public static final String connectionURL="jdbc:mysql://localhost:3306/student1?useUnicode=true&characterEncoding=GB18030&useSSL=false&serverTimezone=GMT&allowPublicKeyRetrieval=true"; public static final String username="root"; public static final String password="123456"; //数据库连接 public static Connection getConnection() { try { Class.forName("com.mysql.cj.jdbc.Driver"); //Class.forName("com.mysql.cj.jdbc.Driver"); return DriverManager.getConnection(connectionURL, username, password); } catch (Exception e) { // TODO: handle exception System.out.println("数据库连接失败"); e.printStackTrace(); } return null; } public static boolean getUsername(String username) { Connection connection=null; PreparedStatement preparedStatement=null; ResultSet rSet=null; try { connection=getConnection(); String sql="select * from new_table where name="+"\'"+username+"\'"; System.out.println(sql); preparedStatement=connection.prepareStatement(sql); rSet=preparedStatement.executeQuery(); if(rSet.next()) { System.out.println(rSet.getString(1)); return true; } else return false; } catch(SQLException e) { e.printStackTrace(); } return false; } public static boolean Signin(String ID,String mima,String sex,String name,String xuehao,String Email,String college,String major,String Class,String year,String place,String beizhu)//写表只改这个函数 { Connection con=null; PreparedStatement pstmt=null; try { con=getConnection(); String sql="insert into student1 (ID,mima,sex,name,xuehao,Email,college,major,Class,year,place,beizhu) values (\'"+ID+"\',\'"+mima+"\',\'"+sex+"\',\'"+name+"\',\'"+xuehao+"\',\'"+Email+"\',\'"+college+"\',\'"+major+"\',\'"+Class+"\',\'"+year+"\',\'"+place+"\',\'"+beizhu+"\')"; System.out.println(sql); pstmt=con.prepareStatement(sql); pstmt.executeUpdate(); return true; } catch(SQLException e) { e.printStackTrace(); } return false; } public static boolean addInformation(String username,String password,String sex,String name,String id,String email,String agency,String major,String classnum,String year,String birthplace,String text) { Connection con=null; PreparedStatement pstmt=null; try { con=getConnection(); String sql="insert into student1 (ID,mima,sex,name,xuehao,Email,college,major,Class,year,place,beizhu) values (\'"+ username+"\',\'"+password+"\',\'"+sex+"\',\'"+name+"\',\'"+id+"\',\'"+email+"\',\'"+agency+"\',\'"+major+"\',\'"+classnum+"\',\'"+year+"\',\'"+birthplace+"\',\'"+text+"\')"; System.out.println(sql); pstmt=con.prepareStatement(sql); pstmt.executeUpdate(); return true; } catch(SQLException e) { e.printStackTrace(); } return false; } }
Selvlet
import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.hjf.util.DBUtil; /** * Servlet implementation class shuju */ @WebServlet("/shujuku") public class shuju extends HttpServlet { private static final long serialVersionUID = 1L; protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub request.setCharacterEncoding("UTF-8"); String username=request.getParameter("ID"); String password=request.getParameter("mima"); String sex=request.getParameter("sex"); String name=request.getParameter("name"); String id=request.getParameter("xuehao"); String email=request.getParameter("Email"); String agency=request.getParameter("college"); String major=request.getParameter("major"); String classnum=request.getParameter("Class"); String year=request.getParameter("year"); String birthplace=request.getParameter("place"); String text=request.getParameter("beizhu"); if(shujuku.addInformation(username,password,sex,name,id,email,agency,major,classnum,year,birthplace,text)) response.sendRedirect("add.jsp?result=true"); else response.sendRedirect("add.jsp?result=false"); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }
add.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>注册</title>
<style >
.a{
margin-top: 20px;
}
.b{
font-size: 20px;
width: 160px;
color: white;
background-color: greenyellow;
}
</style>
</head>
<body onload="getResult()">
<div align="center">
<h1 style="color: red;">当前位置：添加学生信息</h1>
<br>
<form action="shujuku" method="post" >
<div class="a">
登录账号：<input type="text" id="ID" name="ID"/>
</div>
<div class="a">
登录密码：<input type="password" id="mima" datatype="*8-16" nullmsg="请输入8-16位密码！" name="mima" />
</div>
<div class="a">
性别：<select>
<option>--请选择--</option>
<option value="男">男</option>
<option value="女">女</option>
</select>
</div>
<div class="a">
姓名：<input type="text" id="name" name="name" />
</div>
<div class="a">
学号：<input type="text" id="xuehao" name="xuehao" />
</div>
<div class="a">
电子邮箱：<input type="text" id="Email" name="Email" />
</div>
<div class="a">
所在学院：<input type="text" id="college" name="college" />
</div>
<div class="a">
所在系：<input type="text" id="major" name="major" />
</div>
<div class="a">
所在班级：<input type="text" id="Class" name="Class" />
</div>
<div class="a">
入学年份：<select>
<option>--请选择--</option>
<option value="1998">1998</option>
<option value="1999">1999</option>
<option value="2000">2000</option>
<option value="2001">2001</option>
<option value="2002">2002</option>
<option value="2003">2003</option>
<option value="2004">2005</option>
<option value="2006">2007</option>
<option value="2008">2008</option>
</select>
</div>
<div class="a">
生源地：<input type="text" id="place" name="place" />
</div>
<div class="a">
备注：<input type="text" id="beizhu" name="beizhu" />
</div>
<div class="a">
<input type="submit" value="添加" onclick="return check()">
</div>
</form>
</div>
<script type="text/javascript">
function GetQueryString(name) {
var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");
var r = window.location.search.substr(1).match(reg); //获取url中"?"符后的字符串并正则匹配
var context = "";
if (r != null)
context = r[2];
reg = null;
r = null;
return context == null || context == "" || context == "undefined" ? "" : context;
}
function getResult()
{
if(GetQueryString("result")=="true")
alert("添加成功！");
else if(GetQueryString("result")=="false")
alert("添加失败！");
}
function check() {
var ID = document.getElementById("ID");
var mima = document.getElementById("mima");
var xuehao = document.getElementById("xuehao");
var Email = document.getElementById("Email");
var name = document.getElementById("name");
if (!ID.value.match(/^[a-zA-Z]\w{5,11}$/)) {
alert("用户名由六到十二英文字符和数字组成，以英文字母开头");
ID.focus();
return false;
}
else if (!mima.value.match(/^[A-Za-z0-9]\w{7,20}$/)) {
alert(" 密码由八 位 以上英文 和数 字 组成");
mima.focus();
return false;
}
else if(name.value!="徐姣美")
{
alert("姓名错误");
name.focus;
return false;
}
else if(xuehao.value<"20180000"|| xuehao.value>"20189999")
{
alert(" 学号由2018开头的八位组成");
xuehao.focus();
return false;
}
else if (!Email.value.match(/^[a-z0-9]+([._\\-]*[a-z0-9])*@([a-z0-9]+[-a-z0-9]*[a-z0-9]+.){1,63}[a-z0-9]+$/)) {
alert(" 邮箱格式错误");
Email.focus();
return false;
}
}
</script>
</body>
</html>
测试截图：
