Java Tutorial/JSP/Form Post
Содержание
Form Calculator
index.jsp
<HTML>
<HEAD>
</HEAD>
<BODY>
<FORM ACTION="basic.jsp" METHOD="POST">
<CENTER>
<H1>The JSP Calculator</H1>
<INPUT TYPE="TEXT" NAME="op1" VALUE="">
<BR>
+
<BR>
<INPUT TYPE="TEXT" NAME="op2" VALUE="">
<BR>
<INPUT TYPE="SUBMIT" VALUE=" = ">
</CENTER>
</FORM>
</BODY>
</HTML>
Get Form Parameter By Index
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %>
<html>
<head>
<title>Property Access</title>
</head>
<body>
<c:if test="${pageContext.request.method=="POST"}">
<c:set var="idx" value="name" />
param.name =
<c:out value="${param.name}" />
<br />
param[name] =
<c:out value="${param[idx]}" />
<br />
</c:if>
<br />
<form method="post">Please enter your name?
<input type="text" name="name" />
<input type="Submit" />
<br />
</form>
</body>
</html>
Get Form Parameter Enumeration
index.jsp
<HTML>
<HEAD>
<TITLE>Getting Parameter Names</TITLE>
</HEAD>
<BODY>
<H1>Getting Parameter Names<H1>
<FORM ACTION="basic.jsp" METHOD="POST">
<INPUT TYPE="TEXT" NAME="text1">
<BR>
<SELECT NAME="select1" SIZE="5" MULTIPLE>
<OPTION>Option 1</OPTION>
<OPTION selected>Option 2</OPTION>
<OPTION>Option 3</OPTION>
<OPTION>Option 4</OPTION>
<OPTION>Option 5</OPTION>
</SELECT>
<BR>
<INPUT TYPE="SUBMIT" VALUE="Submit">
</FORM>
</BODY>
</HTML>
Get submit button value
<HTML>
<HEAD>
<TITLE>Get submit button value</TITLE>
</HEAD>
<BODY>
<H1>Using Multiple Forms</H1>
<%
if(request.getParameter("submit") != null) {
%>
You clicked
<%= request.getParameter("submit") %>
<%
}
%>
<FORM NAME="form1" METHOD="POST">
<INPUT TYPE="SUBMIT" NAME="submit" VALUE="Button 1">
</FORM>
<FORM NAME="form2" METHOD="POST">
<INPUT TYPE="SUBMIT" NAME="submit" VALUE="Button 2">
</FORM>
<FORM NAME="form3" METHOD="POST">
<INPUT TYPE="SUBMIT" NAME="submit" VALUE="Button 3">
</FORM>
</BODY>
</HTML>
Process the Form action in the save page
<HTML>
<HEAD>
<TITLE>Using Buttons</TITLE>
</HEAD>
<BODY>
<%
//if(request.getParameter("buttonName") != null) {
if(request.getParameterNames() != null) {
%>
You clicked
<%= request.getParameter("buttonName") %>
<%
}
%>
<FORM NAME="form1" METHOD="POST">
<INPUT TYPE="HIDDEN" NAME="buttonName">
<INPUT TYPE="BUTTON" VALUE="Button 1" ONCLICK="button1()">
<INPUT TYPE="BUTTON" VALUE="Button 2" ONCLICK="button2()">
<INPUT TYPE="BUTTON" VALUE="Button 3" ONCLICK="button3()">
</FORM>
<SCRIPT LANGUAGE="JavaScript">
<!--
function button1()
{
document.form1.buttonName.value = "button 1"
form1.submit()
}
function button2()
{
document.form1.buttonName.value = "button 2"
form1.submit()
}
function button3()
{
document.form1.buttonName.value = "button 3"
form1.submit()
}
// -->
</SCRIPT>
</BODY>
</HTML>
Use multiple forms
<HTML>
<HEAD>
<TITLE>Using Multiple Forms</TITLE>
</HEAD>
<BODY>
<H1>Using Multiple Forms</H1>
<%
if(request.getParameter("buttonName") != null) {
%>
You clicked
<%= request.getParameter("buttonName") %>
<%
}
%>
<FORM NAME="form1" METHOD="POST">
<INPUT TYPE="HIDDEN" NAME="buttonName" VALUE="button 1">
<INPUT TYPE="SUBMIT" VALUE="Button 1">
</FORM>
<FORM NAME="form2" METHOD="POST">
<INPUT TYPE="HIDDEN" NAME="buttonName" VALUE="button 2">
<INPUT TYPE="SUBMIT" VALUE="Button 2">
</FORM>
<FORM NAME="form3" METHOD="POST">
<INPUT TYPE="HIDDEN" NAME="buttonName" VALUE="button 3">
<INPUT TYPE="SUBMIT" VALUE="Button 3">
</FORM>
</BODY>
</HTML>
