How to get checked checkbox value from html page to spring mvc controller

Question

im using spring mvc framework with thymeleaf template engine the problem is , i have 1 page with multiple check box iterated sing thymeleaf th:each iterator.When i clicked multiple check boxes i want to pass check box values to the controller method..

html content

<table> 
<tr th:each="q : ${questions}">
 <h3 th:text="${q.questionPattern.questionPattern}"></h3> 
<div>
 <p >
 <input type="checkbox" class="ads_Checkbox" th:text="${q.questionName}" th:value="${q.id}" name="id"/>
 </p>
 </div>
 </tr>
 </table>

*Controller*

 @RequestMapping(value = Array("/saveAssessment"), params = Array({ "save" }))
  def save(@RequestParam set: String, id:Long): String = {
  var userAccount: UserAccount = secService.getLoggedUserAccount
    println(userAccount)
    var questionSetQuestion:QuestionSetQuestion=new QuestionSetQuestion
        var questionSet: QuestionSet = new QuestionSet
    questionSet.setUser(userAccount)
    questionSet.setSetName(set)
    questionSet.setCreatedDate(new java.sql.Date(new java.util.Date().getTime))
   questionSetService.addQuestionSet(questionSet)
     var list2: List[Question] = questionService.findAllQuestion
    var limit=list2.size
     var qustn:Question=null
    var a = 1;
     for( a <- 1 to limit ){
         println(  a  );
      qustn=  questionService.findQuestionById(a)
     questionSetQuestion.setQuestion(qustn)
    questionSetQuestion.setQuestionSet(questionSet)
    questionSetQuestion.setCreatedDate(new java.sql.Date(new java.util.Date().getTime))

    questionSetQuestionService.addQuestionSetQuestion(questionSetQuestion) } "redirect:/teacher/Assessment.html" }

<table> <tr th:each="q : ${questions}"> <h3 th:text="${q.questionPattern.questionPattern}"></h3> <div> <p > <input type="checkbox" class="ads_Checkbox" th:text="${q.questionName}" th:value="${q.id}" name="id"/> </p> </div> </tr> </table> — jijesh Aj
– jijesh Aj, Commented Jun 3, 2013 at 7:05
Well, that's nice. But if you don't add the code that shows us how you've tried it, we can not help you. You must ask a specific question to get a usable answer. — user1907906
– user1907906, Commented Jun 3, 2013 at 7:06

hubbardr · Accepted Answer · 2013-06-04 22:11:20Z

4

I think you pretty much have it. With a checkbox, you can only send one piece of information back with the form...that being the value. So if you are trying to determine which checkboxes are checked when the user clicks the submit button, then I would have the checkboxes all use one name...like "id" (exactly like you have). Value is the actual id of the question (again like you have). Once submitted, "id" will be a String array which includes all the values of the checkboxes that were checked.

So your controller method needs to take param called "ids" mapped to parameter "id" which is a string[]. Now for each id, you can call questionService.findQuestionById.

(I'm not a Groovy guru so no code example sry :)

answered Jun 4, 2013 at 22:11

hubbardr

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2 Comments

jijesh Aj Over a year ago

thnx bt it is not groovy ..it is scala

hubbardr Over a year ago

Ah. Oops. I need to get out more. :)

tharindu_DG · Accepted Answer · 2016-08-14 11:08:34Z

3

I have used JSTL with JSP and thymeleaf was something new. I read the THYMELEAF documentation.

There is a section which explains multi valued check boxes.

<input type="checkbox" 
     class="ads_Checkbox" 
     th:text="${q.questionName}" 
     th:value="${q.id}" name="id"/>

In the above code we are not binding the value to the field of the command object. Instead try doing this

<input type="checkbox" 
     class="ads_Checkbox" 
     th:text="${q.questionName}" 
     th:field="*{selectedQuestions}" 
     th:value="${q.id}" />

here the selectedQuestions is an array object present in the spring command object.

edited Aug 14, 2016 at 11:08

tharindu_DG

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answered Jun 3, 2013 at 20:19

Usha

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