代码改变世界

javaweb注册页面学习之路(二)

2017-08-14 11:18  圣二十一郎  阅读(284)  评论(0)    收藏  举报

本次重构优化内容

　　1 前端页面增加JS判断

  　  2 使用JSTL+EL替换JSP语句

        3 Servlet增加用户名是否重复检查

注册页面 userReg.jsp

<%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()
			+ path + "/";
%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!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>用户注册</title>
<base href="<%=basePath%>">
<script type="text/javascript">
	function surePost() {
		if (document.RegForm.userNum.value == "") {
			alert("用户名不能为空!");
			return false;
		}
		if (document.RegForm.userPwd.value == "") {
			alert("密码不能为空!");
			return false;
		}
		if (document.RegForm.userPwd.value != document.RegForm.userConfirmPwd.value) {
			alert("密码和确认密码输入不一致!");
			return false;
		}

		return true;
	}
</script>
</head>
<body>
	<c:choose>
		<c:when test="${RegResult== '1'} ">
			<%
				response.setHeader("refresh", "2;URL=login.jsp");
			%>	
		注册成功!2秒后跳转到登录页面.	
	</c:when>
		<c:otherwise>
			<form action="UserSvt?xtype=0" method="post" name="RegForm"
				onsubmit="return surePost()">
				<table>
					<tr>
						<td>用 户 名:</td>
						<td><input type="text" name="userNum" /></td>
					</tr>
					<tr>
						<td>姓 名:</td>
						<td><input type="text" name="userName" /></td>
					</tr>
					<tr>
						<td>电子邮箱:</td>
						<td><input type="text" name="userEmail" /></td>
					</tr>
					<tr>
						<td>密 码:</td>
						<td><input type="password" name="userPwd" /></td>
					</tr>
					<tr>
						<td>确认密码:</td>
						<td><input type="password" name="userConfirmPwd" /></td>
					</tr>
					<tr>
						<td><input type="submit" value="注册"></td>
					</tr>
				</table>
			</form>
			<c:if test="${RegResult == '-1'}">
				注册失败。
				${RegResultInfo } 	
			</c:if>
		</c:otherwise>
	</c:choose>
</body>
</html>

后台Servlet

protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		int nXType = Integer.parseInt(request.getParameter("xtype"));
		if (nXType == 0) {
			UserItem userItem = new UserItem();
			userItem.setStrUserNum(request.getParameter("userNum"));
			userItem.setStrUserName(TCommonTool.GetUTF8(request.getParameter("userName")));
			userItem.setStrPwd(request.getParameter("userPwd"));
			userItem.setStrEmail(request.getParameter("userEmail"));

			if (!userItem.getStrPwd().equals(request.getParameter("userConfirmPwd"))) {
				request.setAttribute("RegResult", "-1");
				request.setAttribute("RegResultInfo", "密码和确认密码输入不一致.");
				RequestDispatcher rd = request.getRequestDispatcher("userReg.jsp");
				rd.forward(request, response);
				return;
			}

			DBUser dbUser = new DBUser();
			dbUser.GetUser(userItem);

			if (userItem.getStrGUID().equals("")) {

				userItem.setStrGUID(java.util.UUID.randomUUID().toString());
				dbUser.AddUser(userItem);
				request.setAttribute("RegResult", "1");
			} else {
				request.setAttribute("RegResult", "-1");
				request.setAttribute("RegResultInfo", "用户名" + userItem.getStrUserNum() + "已经存在.");
			}

			RequestDispatcher rd = request.getRequestDispatcher("userReg.jsp");
			rd.forward(request, response);

		}

	}