JavaWeb网上图书商城完整项目--day02-9.提交注册表单功能之servlet层实现
1、当用户在界面提交注册提交的时候,我们在UerServlet来实现具体的业务方法
标准demo:
1CommonUtils
CommonUtils类就两个方法:
lString uuid():生成长度32的随机字符,通常用来做实体类的ID。底层使用了UUID类完成;
toBean(Map, Class<T>):把Map转换成指定类型的Bean对象。通常用来获取表单数据(request.getParameterMap())封装到JavaBean中,底层使用了common-beanutils。注意,本方法要求map中键的名称要与Bean的属性名称相同才能完成映射,否则不能完成映射。
梳理下UserServlet的思路:
1、获得请求的参数,将请求的参数封装成dao数据层操作的对象;
2、对收到的参数进行合法性校验;
3、如果校验成功,将对象保存到数据库中,然后跳转到登陆页面;
4、如果校验失败,将失败的参数封装成一个map对象,将失败的原因在regist.jsp页面中显示出来
我们来看下代码:
我们来看看msg.jsp的代码:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>信息板</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> <style type="text/css"> body { font-size: 10pt; color: #404040; font-family: SimSun; } .divBody { margin-left: 15%; } .divTitle { text-align:left; width: 900px; height: 25px; line-height: 25px; background-color: #efeae5; border: 5px solid #efeae5; } .divContent { width: 900px; height: 230px; border: 5px solid #efeae5; margin-right:20px; margin-bottom:20px; } .spanTitle { margin-top: 10px; margin-left:10px; height:25px; font-weight: 900; } a {text-decoration: none;} a:visited {color: #018BD3;} a:hover {color:#FF6600; text-decoration: underline;} } </style> </head> <body> <c:choose> <c:when test="${code eq 'success' }"> <c:set var="img" value="/images/duihao.jpg"/> <c:set var="title" value="成功"/> </c:when> <c:when test="${code eq 'error' }"> <c:set var="img" value="/images/cuohao.png"/> <c:set var="title" value="失败"/> </c:when> </c:choose> <div class="divBody"> <div class="divTitle"> <span class="spanTitle">${title }</span> </div> <div class="divContent"> <div style="margin: 20px;"> <img style="float: left; margin-right: 30px;" src="<c:url value='${img }'/>" width="150"/> <span style="font-size: 30px; color: #c30; font-weight: 900;">${msg }</span> <br/> <br/> <br/> <br/> <span style="margin-left: 50px;"><a target="_top" href="<c:url value='/jsps/user/login.jsp'/>">登录</a></span> <span style="margin-left: 50px;"><a target="_top" href="<c:url value='/index.jsp'/>">主页</a></span> </div> </div> </div> </body> </html>
1、使用了c标签
<c:choose>、<c:when>和<c:otherwise>在一起连用,可以实现Java语言中的if-else语句的功能。例如以下代码根据username请求参数的值来打印不同的结果:
msg.jsp中存在下面的几个参数
${code}
${msg}
这两个属性需要从UserServlet中传递过来,
${code}的值如果等于success,那么title的值显示成功,对应的${img}对应的图片是/images/duihao.jpg
我们来看UserServlet的代码:
package com.weiyuan.goods.user.web.servlet; import java.io.IOException; import java.util.Map; 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 org.apache.commons.collections.map.HashedMap; import com.weiyuan.goods.user.domian.User; import com.weiyuan.goods.user.service.UserService; import cn.itcast.commons.CommonUtils; import cn.itcast.servlet.BaseServlet; /** * Servlet implementation class UserServlet */ @WebServlet("/UserServlet") public class UserServlet extends BaseServlet{ private static final long serialVersionUID = 1L; private UserService service = new UserService(); /* * 用户注册页面使用ajax校验/* * 用户注册页面使用ajax校验用户名会调用该方法 * *会调用该方法 * */ public String validateLoginname(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub //首先获得用户上传的用户名 String loginName = request.getParameter("loginname"); boolean flag = service.ajaxValidateLoginName(loginName); response.getWriter().print(flag); return null; } /* * 用户注册页面使用ajax校验邮箱会调用该方法 * */ public String validateEmail(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub //获得用户上传的emai String email = request.getParameter("email"); System.out.println("validateEmail is called"+email); boolean flag = service.ajaxValidateEmail(email); response.getWriter().print(flag); return null; } /* * 用户注册页面使用ajax校验验证码会调用该方法 * */ public String validateVerifyCode(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub //获得用户上传的verfycode String verifyCode = request.getParameter("verifyCode"); //获得session中保存的验证码 String sessionCode = (String) request.getSession().getAttribute("vCode"); //二者进行比较看是否相等 System.out.println("validateVerifyCode is called"+verifyCode+":"+sessionCode); boolean flag = sessionCode.equalsIgnoreCase(verifyCode); response.getWriter().print(flag); return null; } /* * 当用户从邮箱点击的激活的时候会调用该方法,并且把激活码传递过来 * * */ public String activation(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub System.out.println("activation is called"); //1、将请求的参数封装成User对象 User user = CommonUtils.toBean(request.getParameterMap(), User.class); //2 、对传递过来的参数进行校验,把错误的信息封装到一个hashMap中 Map errors = validateParams(user, request); if(errors.size() > 0){//说明参数错误,跳转到注册界面提示用户输入的参数有误 request.setAttribute("errors", errors); return "f:/jsps/user/regist.jsp"; } service.addUser(user); request.setAttribute("code", "success"); request.setAttribute("msg", "用户注册成功,请马上到邮箱进行激活"); return "f:/jsps/msg.jsp"; } /* * 当用户注册的时候会调用该方法 * * */ public String regist(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub System.out.println("activation is called"); //1、将请求的参数封装成User对象 User user = CommonUtils.toBean(request.getParameterMap(), User.class); //2 、对传递过来的参数进行校验,把错误的信息封装到一个hashMap中 return null; } public Map validateParams(User user,HttpServletRequest request){ Map<String, String> map = new HashedMap(); //校验用户名 String loginName = user.getLoginname(); if(loginName == null || loginName.isEmpty()){ map.put("loginname", "用户名不能为空"); } if(loginName.length() < 3 || loginName.length() > 20){ map.put("loginname", "用户名长度应该在3到20之间"); } //校验用户名是否注册 if(service.ajaxValidateLoginName(loginName)){ map.put("loginname", "用户名已经被注册"); } //检查登陆密码 String loginpass = user.getLoginpass(); if(loginpass == null || loginpass.isEmpty()){ map.put("loginpass", "登陆密码不能为空"); } if(loginpass.length() < 3 || loginpass.length() > 20){ map.put("loginname", "登陆密码的长度应该在3到20之间"); } //检查确认密码的信息 //检查登陆密码 String reloginpass = user.getReloginpass(); if(reloginpass == null || reloginpass.isEmpty()){ map.put("reloginpass", "登陆密码不能为空"); } if(reloginpass.length() < 3 || reloginpass.length() > 20){ map.put("reloginpass", "登陆密码的长度应该在3到20之间"); } if(!reloginpass.equalsIgnoreCase(loginpass)){ map.put("reloginpass", "两次输入的密码不一样"); } //检查邮箱 String email = user.getEmail(); if(email == null || email.isEmpty()){ map.put("email", "登陆邮箱不能为空"); } //检查邮箱的格式是否正确 if(!email.matches("^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+((\\.[a-zA-Z0-9_-]{2,3}){1,2})$")){ map.put("email", "邮箱格式不正确"); } //检查验证码是否相等 String verifyCode = user.getVerifyCode(); //获得session中保存的验证码 String sessionCode =(String) request.getSession().getAttribute("vCode"); if(!verifyCode.equalsIgnoreCase(sessionCode)){ map.put("verifyCode", "验证码不正确"); } return map; } }
posted on 2017-05-11 16:47 luzhouxiaoshuai 阅读(583) 评论(0) 编辑 收藏 举报