JavaWeb之Servlet注册页面的实现示例
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"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <h1>用户注册</h1> <div> <form action="RegisterServlet" method="get"> <table> <tr> <td>登录名:</td> <td><input type="text" name="username" required> (可包含a-z、0-9和下划线)</td> </br> <tr> <td>密码:</td> <td><input type="password" name="password" required> (至少包含6个字符)</td> </tr> <tr> <td>再次输入密码:</td> <td><input type="password" name="confirmPassword" required></td> </tr> <tr> <td>电子邮箱:</td> <td><input type="text" id="email" name="youxaing" required> (必须包含@字符)</td> </tr> <tr> <td>性别:</td> <td><input type="radio" name="gender" value="男" required>男 <input type="radio" name="gender" value="女" required>女</td> </tr> <td>头像:</td> <td><input type="file" name="bfile" value="选择文件" accept="image/*" ></td> </tr> <td>爱好:</td> <td> <p> <input type="checkbox" name="hobby" value="运动"> 运动 <input type="checkbox" name="hobby" value="聊天" > 聊天 <input type="checkbox" name="hobby" value="玩游戏" > 玩游戏</p> </td> </tr> </tr> <td>喜欢的城市:</td> <td> <select name="selectList"> <option>[请选择]</option> <option>北海</option> <option>海南</option> <option>重庆</option> <option>杭州</option> <option>深圳</option> <option>成都</option> </select> </tr> </table> <div> <p> <input type="submit" value="提交"> <input type="reset" value="重置"> </p> </div> </form> </div> </body> </html>
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
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1"> <display-name>onlyxiu_ceshi</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> <servlet> <servlet-name>Login_Servlet</servlet-name> <servlet-class>onlyxiu_ceshi.com</servlet-class> </servlet> <servlet-mapping> <servlet-name>Login_Servlet</servlet-name> <url-pattern>/onlyxiu_ceshi/Login_Servlet</url-pattern> </servlet-mapping> </web-app>
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("<h1>用户注册信息</h1>"); out.print("用户名:\n"+username+"<br>"); out.print("密码:"+password+"<br>"); out.print("电子邮箱:"+youxaing+"<br>"); out.print("性别:"+gender+"<br>"); out.print("头像:"+bfile+"<br>"); out.print("爱好:"+hobby+"<br>"); out.print("喜欢的城市:"+selectList+"<br>"); // 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("<h1>用户注册信息</h1>"); out.print("用户名:\n"+username+"<br>"); out.print("密码:"+password+"<br>"); out.print("电子邮箱:"+youxaing+"<br>"); out.print("性别:"+gender+"<br>"); out.print("头像:"+bfile+"<br>"); out.print("爱好:"+hobby+"<br>"); out.print("喜欢的城市:"+selectList+"<br>"); // 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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