1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | <%@ page language="java" %> <%@ page import="business.util.Validation" %> <%@ page import="business.db.MailingList" %> <% String error = ""; String email = request.getParameter("email"); // 是否有电子邮件地址 if( email!=null ) { // 验证输入... if( business.util.Validation.isValidEmail(email) ) { // 存储输入... try { business.db.MailingList.AddEmail(email); } catch (Exception e) { error = "Error adding email address to system. " + e; } if( error.length()==0 ) { %> // 重定向到欢迎页... <jsp:forward page="welcome.html"/> <% } } else { // 设置错误消息并重新显示网页 error = email + " is not a valid email address, please try again."; } } else { email = ""; } %> <html> <head> <title>Join Mailing List</title> </head> <body> <font color=red><%=error%></font><br> <h3>Enter your email to join the group</h3> <form action="join.jsp" name="joinForm"> <input name="email" id="email" value=<%=email%>></input> <input type=submit value="submit"> </form> </body> </html> |
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