Java/JSP/Form Hidden Field

Материал из Java эксперт
Перейти к: навигация, поиск

Reading Hidden Controls

<HTML>
  <HEAD>
    <TITLE>Reading Hidden Controls</TITLE>
  </HEAD>
    <BODY>
        <H1>Reading Hidden Controls</H1>
        <% 
            String text = "";
            if(request.getParameter("TEXT1") != null) {
                out.println("The hidden text is:" + request.getParameter("TEXT1")); 
                text = request.getParameter("TEXT1");
            }
        %>
        <FORM ACTION="action.jsp" METHOD="POST">
            <INPUT TYPE="TEXT" NAME="TEXT1">
            <INPUT TYPE="HIDDEN" NAME="HIDDEN" 
                VALUE="<%= text%>">
            <INPUT TYPE="SUBMIT" VALUE="Set Hidden Text">
        </FORM>
    </BODY>
</HTML>





Submitting Hidden Fields

//File: index.html
<HTML>
    <HEAD>
        <TITLE>Submitting Hidden Fields</TITLE>
    </HEAD>
 
    <BODY>
        <H1>Submitting Hidden Fields</H1>
        <FORM ACTION="formAction.jsp" METHOD="POST">
            <INPUT TYPE="HIDDEN" NAME="HIDDEN" VALUE="Hello from JSP!">
            <INPUT TYPE="SUBMIT" VALUE="Submit">
        </FORM>
    </BODY>
</HTML>

//////////////////////////////////////////////////////////////////////
//File: formAction.jsp
<HTML>
  <HEAD>
    <TITLE>Reading Hidden Controls</TITLE>
  </HEAD>
    <BODY>
        <H1>Reading Hidden Controls</H1>
        The hidden text is: 
        <% out.println(request.getParameter("HIDDEN")); %>
    </BODY>
</HTML>


Источник — «http://jexp.ru/index.php?title=Java/JSP/Form_Hidden_Field&oldid=8643»