How to read checkboxes from table in form (jsp)?

**ela1109** · Jun 21st, 2012, 04:51 AM

Hello,

In my database I have table Person. In my entity class Person.class beside all other data (name, age,...) I have Boolean forGrouping field. In my application I have all dao, jdbc_dao, service and controller classes and packages and all works perfect. I use jsp for view data and ModelAndView in controller. My 'procedureForAllPersons' returns List<Person> but when I put List<Person> in '@ModelAttribute(value="allPersons") Person allPersons' in doGrouping I got error.

PersonController.java

Code:

package net.jdj.coffee.web;
...
@Controller
@SessionAttributes({"userSession"})
@RequestMapping("/person.htm")
public class PersonController {
...
   @RequestMapping(method=RequestMethod.GET)
   public String showForm(ModelMap model, @ModelAttribute UserSession userSession) {
      ...
      model.addAttribute("allPersons", procedureForAllPersons);
      ...
      return "person";
   }

   @RequestMapping(params="group=true", method=RequestMethod.POST)
   public String doGrouping(
      @ModelAttribute(value="allPersons") Person allPersons,
      BindingResult result, @ModelAttribute UserSession userSession) {
	String putanja = "wrongGrouping.htm";
	// now i want to do something only with records with forGrouping checked
	... THIS IS WHAT I DON T NOW!
	if (ok) {
	  putanja = "goodGrouping.htm"	}
		
      	return "redirect:" + putanja;
   }

}

Person.jsp

HTML Code:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<%@ page session="false"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form"%>

<html>
<head>...</head>

<body>
   <!-- Main Page Container -->
   <div class="page-container">
   ...
      <!-- B.1 MAIN CONTENT -->
      <div class="main-content">
         <!-- Content unit - One column -->
         <div class="column1-unit">
            <form:form commandName="allPersons"
		action="person.htm?group=true" name="formGrouping">
            <fieldset>
               <c:if test="${!empty allPersons}">
                  <table width="90%">
                    <thead>
                      <tr>
			    <th width="15px" style="display: none"></th>
			    <th width="15px">?</th>
			    <th width="40px">name</th>
				...
			  </tr>
										                                        			</thead>
			<tbody>
			  <c:forEach items="${allPersons}" var="persons">
			    <tr id="${persons.id}" >
			      <td><form:input type="checkbox" name="forGrouping" id="forGrouping" path="forGrouping" value="${persons.forGrouping}"/></td>
			      <td><c:out value="${persons.name}"/></td>
				...
			    </tr>
			   </c:forEach>
			</tbody>
		      </table>
		   </c:if>
		   <p><input type="submit" value="Do grouping" /></p>
		</fieldset>
		</form:form>
	    </div>          
        <hr class="clear-contentunit" />        

      </div>
    </div>
      
    <!-- C. FOOTER AREA -->      
	...
  </div>
</body>
</html>

User in list of persons some persons ckeck and click submit.

My question is: How to read allPersons after submit? It is List<Person> with new value of some forGrouping (in only some records) but I don t know how to read which records are checked and which are not.

I am looking for examples in net for last two weeks but my English is not good enough to ask good question in Google.
Thanks, Ela

**ela1109** · Jun 21st, 2012, 11:48 AM

I found something better but I have problem with it. It is in Multiple Row Form Submit using List of Beans.
Ela

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