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);
}
}