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

ed 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 stubdoGet(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.annotahttps://www.easck.com/tion.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 doPostwww.easck.com(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stub//doGet(request, response);}}

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