标签：web JAVA String request getParameter sql return 课堂 name
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 onl oad="getResult()">
<table align="center">
<div align="center">
<h1 style="color: red;">当前位置：添加学生信息</h1>
<form action="shujuku" method="post" >
<tr>
<td>登入账号：</td>
<td><input type="text" id="ID" name="ID" value="" ></td>
</tr>
<tr>
<td>登入密码：</td>
<td> <input type="password" id="mima" name="mima" value="" ></td>
</tr>
<tr>
<td>性 别：</td>
<td>
<select id="sex" name="sex" >
<option>--请选择--</option>
<option value="男">男</option>
<option value="女">女</option>
</select>
</td>
</tr>
<tr>
<td>姓 名：</td>
<td> <input type="text" name="name" value="" ></td>
</tr>
<tr>
<td>学 号：</td>
<td> <input type="text" name="xuehao" id="xuehao" value="" ></td>
</tr>
<tr>
<td>电子邮件：</td>
<td> <input type="text" id="Email" name="Email" value="" ></td>
</tr>
<tr>
<td>所在学院：</td>
<td> <input type="text" id="college" name="college" value="" ></td>
</tr>
<tr>
<td>所在系：</td>
<td> <input type="text" id="major" name="major" value="" ></td>
</tr>
<tr>
<td>所在班级：</td>
<td> <input type="text" id="Class" name="Class" value="" ></td>
</tr>
<tr>
<td>入学年份（届）：</td>
<td>
<select id="year" name="year">
<option>--请选择--</option>
<option value="2018">2018</option>
<option value="2017">2019</option>
<option value="2016">2018</option>
<option value="2015">2019</option>
<option value="2014">2018</option>
</select>
</td>
</tr>
<tr>
<td>生源地：</td>
<td> <input type="text" id="place" name="place" value="" ></td>
</tr>
<tr>
<td>备注：</td>
<td> <input type="text" id="beizhu" name="beizhu" value="" ></td>
</tr>
<tr>
<td> <button type="submit" >添 加</button></td>
</tr>
</table>
</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>
标签：web,JAVA,String,request,getParameter,sql,return,课堂,name 来源： https://www.cnblogs.com/xjmm/p/11715699.html
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