<%--
Created by IntelliJ IDEA.
User: xinfeng
Date: 2020/5/22
Time: 10:00
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>$Title$</title>
</head>
<body>
<form action="dologin.jsp" method="post">
用户名:<input type="text" name="uname"/><br>
密码 ：<input type="password" name="upwd"/><br>
验证码 ：<input type="text" name="validationCode" size="6"/>
<%
int intmethod1 = (int) (Math.random() * 10);
int intmethod2 = (int) (Math.random() * 10);
int intmethod3 = (int) (Math.random() * 10);
int intmethod4 = (int) (Math.random() * 10);
String intsum = intmethod1 + "" + intmethod2 + intmethod3
+ intmethod4;
%>
<input type="hidden" name="validationCode1" value="<%=intsum%>">
<img
src="image/<%=intmethod1%>.png">
<img
src="image/<%=intmethod2%>.png">
<img
src="image/<%=intmethod3%>.png">
<img
src="image/<%=intmethod4%>.png"><br><br>
<input type="submit" name="submit" value="登录">
<input type="reset" value="重置"><br><br>
<a href="register.jsp">注册新用户请单击此处</a>
</form>
</body>
</html>
<%--
Created by IntelliJ IDEA.
User: xinfeng
Date: 2020/5/22
Time: 10:00
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form action="RegisterServlet" method="post">
用户名：<input name="username"><br><br>
密 码：<input name="userpassword"><br><br>
邮 箱：<input name="Email"><br><br>
<input type="submit" name="submit" value="注册">
<input type="reset" value="重置"><br>
</form>
</body>
</html>
package Servlet;
import JDBC.JDBC;
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 javax.swing.*;
import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
@WebServlet(name = "LoginServlet")
public class RegisterServlet extends HttpServlet {
public RegisterServlet() {
super();
}
@Override
public void destroy() {
super.destroy();
}
public void wrong1() {
String msg = "注册成功！";
int type = JOptionPane.YES_NO_OPTION;
String title = "信息提示";
JOptionPane.showMessageDialog(null, msg, title, type);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
JDBC jdbc = new JDBC();
Connection con = null;
PreparedStatement ps = null;
String username=new String(request.getParameter("username").getBytes("ISO-8859-1"),"UTF-8");
String PASSWORD=new String(request.getParameter("userpassword").getBytes("ISO-8859-1"),"UTF-8");
String email=new String(request.getParameter("Email").getBytes("ISO-8859-1"),"UTF-8");
try {
con = jdbc.getConnection();
String sql = "insert into users(username,PASSWORD,email) values (?,?,?)";
ps = con.prepareStatement(sql);
ps.setString(1, username);
ps.setString(2,PASSWORD);
ps.setString(3, email);
int row = ps.executeUpdate();
wrong1();
} catch (SQLException e) {
e.printStackTrace();
}finally {
jdbc.closeAll(con,ps,null);
}
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
}
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<servlet-mapping>
<servlet-name>RegisterServlet</servlet-name>
<url-pattern>/RegisterServlet</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>RegisterServlet</servlet-name>
<servlet-class>Servlet.RegisterServlet</servlet-class>
</servlet>
</web-app>