JavaWeb之Servlet注册页面怎么实现

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Servlet-注册页面

环境准备：

本文所用到环境如下：

软件：Eclipse(2018)

服务器：Tomcat 9

在index.jsp添加相关的代码

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%>
用户注册
    
    
    
    
登录名：
     
 (可包含a-z、0-9和下划线)
        
    
密码：
     
 (至少包含6个字符)
    
    
    
再次输入密码：
     
    
    
    
电子邮箱：
     
 (必须包含@字符)
    
    
    
性别：
     
男        女
    
     
头像：
     
    
     
爱好：
     
    
            运动       聊天       玩游戏
          
    
             
喜欢的城市：
     
                  [请选择]         北海         海南         重庆         杭州         深圳         成都            
        
    
    
                   
     
    

效果为：

Login_Servlet.java代码

package onlyxiu_ceshi.com;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 javax.servlet.http.HttpSession;/** * Servlet implementation class Login_Servlet */@WebServlet("/Login_Servlet")public class Login_Servlet extends HttpServlet {        private static final long serialVersionUID = 1L;           /**     * @see HttpServlet#HttpServlet()     */    public Login_Servlet() {        super();        // TODO Auto-generated constructor stub    }        /**         * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)         */        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {                // TODO Auto-generated method stub//              response.getWriter().append("Served at: ").append(request.getContextPath());                                                 request.setCharacterEncoding("UTF-8");//处理乱码问题                response.setCharacterEncoding("UTF-8");//处理乱码问题                //获得用户在register界面提交的数据                String username = request.getParameter("username");                String password = request.getParameter("password");                String confirmPassword = request.getParameter("confirmPassword");                String gender = request.getParameter("gender");                String youxaing = request.getParameter("youxaing");                String bfile = request.getParameter("bfile");                String hobby  = request.getParameter("hobby");                String selectList = request.getParameter("selectList");                //判断密码是否正确                if (password.equals(confirmPassword)){//如果密码相同，重定向到成功界面                    HttpSession session = request.getSession();//获取session                    session.setAttribute("session_username",username);                    session.setAttribute("session_password",password);                    session.setAttribute("session_gender",gender);                    session.setAttribute("session_youxaing",youxaing);                    session.setAttribute("session_bfile",bfile);                    session.setAttribute("session_hobby", hobby);                    session.setAttribute("session_selectList",selectList);                                       request.getRequestDispatcher("SuccessServlet").forward(request, response);                  //  response.sendRedirect("register_login.jsp");//重定向到成功页面                }else {//如果密码不同，通知用户密码输入不一样                    request.getSession().setAttribute("passwordError","yes");                    request.getRequestDispatcher("ErrorServlet").forward(request, response);//                  response.sendRedirect("register.jsp");//重定向到登陆界面                }            }                /**         * @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);        }}

配置web.xml

  onlyxiu_ceshi      index.html    index.htm    index.jsp    default.html    default.htm    default.jsp          Login_Servlet    onlyxiu_ceshi.com        Login_Servlet    /onlyxiu_ceshi/Login_Servlet    

ErrorServlet.java的代码

package onlyxiu_ceshi.com;import java.io.IOException;import java.io.PrintWriter;import java.util.Arrays;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.servlet.http.HttpSession;/** * Servlet implementation class ErrorServlet */@WebServlet("/ErrorServlet")public class ErrorServlet extends HttpServlet {        private static final long serialVersionUID = 1L;           /**     * @see HttpServlet#HttpServlet()     */    public ErrorServlet() {        super();        // TODO Auto-generated constructor stub    }        /**         * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)         */        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {                // TODO Auto-generated method stub//              response.getWriter().append("Served at: ").append(request.getContextPath());                                response.setHeader("Content-type","text/html; charset=UTF-8");                String username = request.getParameter("username");                String password = request.getParameter("password");                String gender = request.getParameter("gender");                String youxaing = request.getParameter("youxaing");                String bfile = request.getParameter("bfile");                String hobby = request.getParameter("hobby");                String selectList = request.getParameter("selectList");                PrintWriter out = response.getWriter();                out.print("
用户注册信息
");                out.print("用户名:\n"+username+"
");                out.print("密码:"+password+"
");                out.print("电子邮箱："+youxaing+"
");                out.print("性别:"+gender+"
");                out.print("头像："+bfile+"
");                out.print("爱好："+hobby+"
");                out.print("喜欢的城市："+selectList+"
");//              out.print("登陆失败");                out.close();        }        /**         * @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);        }}

SuccessServlet.java

package onlyxiu_ceshi.com;import java.io.IOException;import java.io.PrintWriter;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.servlet.http.HttpSession;/** * Servlet implementation class SuccessServlet */@WebServlet("/SuccessServlet")public class SuccessServlet extends HttpServlet {        private static final long serialVersionUID = 1L;           /**     * @see HttpServlet#HttpServlet()     */    public SuccessServlet() {        super();        // TODO Auto-generated constructor stub    }        /**         * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)         */        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {                // TODO Auto-generated method stub//              response.getWriter().append("Served at: ").append(request.getContextPath());                response.setHeader("Content-type","text/html; charset=UTF-8");                String username = request.getParameter("username");                String password = request.getParameter("password");                String gender = request.getParameter("gender");                String youxaing = request.getParameter("youxaing");                String bfile = request.getParameter("bfile");                String hobby = request.getParameter("hobby");                String selectList = request.getParameter("selectList");                PrintWriter out = response.getWriter();                out.print("
用户注册信息
");                out.print("用户名:\n"+username+"
");                out.print("密码:"+password+"
");                out.print("电子邮箱："+youxaing+"
");                out.print("性别:"+gender+"
");                out.print("头像："+bfile+"
");                out.print("爱好："+hobby+"
");                out.print("喜欢的城市："+selectList+"
");//              out.println("登陆成功");                out.close();        }        /**         * @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);        }}

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