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<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
how to get values in spring from select box of jsp files.
-
13-10-2022 - |
题
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="core" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ page import="java.util.List" %>
<%@ page import="java.util.Iterator" %>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<!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=ISO-8859-1">
<title>login manual</title>
<style type="text/css">
</style>
</head>
<body>
<a href="loginform.html">Back</a>
<script type="text/javascript">
window.onload = function()
{
//var opt = document.getElementById("ch").options[0];
// opt.text="";
//opt.value="";
};
</script>
<div id="body">
<div id="head">
<h1>Extramark @ school</h1>
</div>
<form:form action="loginsuccess.html" commandName="loginSuccess" >
<div id="choose">
<table>
<tr>
<td>Class</td>
<td><form:select path="std" id="ch" name="ch" onchange="choose()">
<option value="VI">VI</option>
<option value="VII">VII</option>
<option value="VIII">VIII</option>
<option value="X" >X</option>
<option value="XI" >XI</option>
<option value="XII" >XII</option>
</form:select></td>
</tr>
</table>
<table>
<tr>
<td>Subject</td>
<td><form:select path="subject" id="subselect">
<option id="s1" value=""></option>
<option></option>
<option></option>
<option></option>
<option></option>
<option></option>
</form:select></td>
</tr>
</table>
<div>
<input type="submit" value="Submit">
</div>
</div>
</form:form>
<script type="text/javascript">
function choose()
{
var sch = document.getElementById("ch").value;
if(sch=="VI")
{
var opt = document.getElementById("subselect").options[0];
opt.text="maths";
opt.value="maths";
var opt = document.getElementById("subselect").options[1];
opt.text="science";
opt.value="science";
var opt = document.getElementById("subselect").options[2];
opt.text="physcics";
opt.value="physcics";
}
if(sch=="VII")
{
var opt = document.getElementById("subselect").options[0];
opt.text="English";
opt.value="English";
var opt = document.getElementById("subselect").options[1];
opt.text="social science";
opt.value="social science";
var opt = document.getElementById("subselect").options[2];
opt.text="tamil";
opt.value="tamil";
}
if(sch=="VIII")
{
var opt = document.getElementById("subselect").options[0];
opt.text="Computer science";
opt.value="Computer science";
var opt = document.getElementById("subselect").options[1];
opt.text="science";
opt.value="science";
var opt = document.getElementById("subselect").options[2];
opt.text="physcics";
opt.value="physcics";
}
if(sch=="X")
{
var opt = document.getElementById("subselect").options[0];
opt.text="physcics";
opt.value="physcics";
var opt = document.getElementById("subselect").options[1];
opt.text="science";
opt.value="science";
var opt = document.getElementById("subselect").options[2];
opt.text="Computer science";
opt.value="Computer science";
}
if(sch=="XI")
{
var opt = document.getElementById("subselect").options[0];
opt.text="tamil";
opt.value="tamil";
var opt = document.getElementById("subselect").options[1];
opt.text="science";
opt.value="science";
var opt = document.getElementById("subselect").options[2];
opt.text="Computer science";
opt.value="Computer science";
}
if(sch=="XII")
{
var opt = document.getElementById("subselect").options[0];
opt.text="malayalam";
opt.value="malayalam";
var opt = document.getElementById("subselect").options[1];
opt.text="science";
opt.value="science";
var opt = document.getElementById("subselect").options[2];
opt.text="Computer science";
opt.value="Computer science";
}
}
</script>
</div>
</body>
</html>
package net.devmanuals.controllers;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.validation.BindingResult;
import java.util.Map;
import javax.validation.Valid;
import javax.validation.constraints.Size;
import org.hibernate.validator.constraints.NotEmpty;
class LoginSuccess
{
@NotEmpty
@Size(min = 1, max = 50)
private String stn;
@NotEmpty
@Size(min = 1, max = 20)
private String subject;
public void setStd(String stn)
{
this.stn = stn;
}
public String getStd()
{
return stn;
}
public void setSubject(String subject)
{
this.subject = subject;
}
public String getSubject()
{
return subject;
}
}
@Controller
@RequestMapping("loginsuccess.html")
public class SubjectVerification
{
@RequestMapping(method=RequestMethod.GET)
public String showForm(Map model)
{
LoginSuccess loginSuccess=new LoginSuccess();
model.put("loginSuccess", loginSuccess);
// System.out.println(""+loginSuccess.getStd());
//System.out.println(""+loginSuccess.getSubject());
System.out.println("hello");
return "loginsuccess";
}
@RequestMapping(method=RequestMethod.POST)
public String processForm(@Valid LoginSuccess loginSuccess,BindingResult result,Map model)
{
System.out.println("hello world");
String stn="VI";
String subject="maths";
loginSuccess=(LoginSuccess)model.get("loginSuccess");
if(loginSuccess.getStd().equals(stn)&&loginSuccess.getSubject().equals(subject))
{
return "maths";
}
model.put("loginSuccess",loginSuccess);
return "loginform";
}
}
In the above codes i used for get the selected item value from jsp to java spring. but i cant get the values from jsp file. it displays null value. so how can i change it. and give me the suggestion for get the selected values from select box to java program
Thanks in advance
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