Java Tutorial/JSP/Form Post
Содержание
- 1 Form Calculator
- 2 The JSP Calculator
- 3 Getting Parameter Names<H1> <FORM ACTION="basic.jsp" METHOD="POST"> <INPUT TYPE="TEXT" NAME="text1"> <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> <INPUT TYPE="SUBMIT" VALUE="Submit"> </FORM> </BODY> </HTML></source> Get submit button value
- 4 Using Multiple Forms
Form Calculator
index.jsp
<source lang="java">
<HTML>
<HEAD>
</HEAD>
<BODY>
<FORM ACTION="basic.jsp" METHOD="POST">
The JSP Calculator
<INPUT TYPE="TEXT" NAME="op1" VALUE="">
+
<INPUT TYPE="TEXT" NAME="op2" VALUE="">
<INPUT TYPE="SUBMIT" VALUE=" = ">
</FORM> </BODY>
</HTML></source>
Get Form Parameter By Index
<source lang="java">
<%@ 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}" />
param[name] =
<c:out value="${param[idx]}" />
</c:if>
<form method="post">Please enter your name?
<input type="text" name="name" />
<input type="Submit" />
</form>
</body>
</html></source>
Get Form Parameter Enumeration
index.jsp
<source lang="java">
<HTML>
<HEAD>
<TITLE>Getting Parameter Names</TITLE>
</HEAD>
<BODY>
Getting Parameter Names<H1>
<FORM ACTION="basic.jsp" METHOD="POST">
<INPUT TYPE="TEXT" NAME="text1">
<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>
<INPUT TYPE="SUBMIT" VALUE="Submit">
</FORM>
</BODY>
</HTML></source>
Get submit button value
<source lang="java">
<HTML>
<HEAD>
<TITLE>Get submit button value</TITLE>
</HEAD>
<BODY>
<H1>Using Multiple Forms
<%
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></source>
Process the Form action in the save page
<source lang="java">
<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">
</SCRIPT>
</BODY>
</HTML></source>
Use multiple forms
<source lang="java">
<HTML>
<HEAD>
<TITLE>Using Multiple Forms</TITLE>
</HEAD>
<BODY>
Using Multiple Forms
<%
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></source>
