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

    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

  • #2
    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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