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I want to ask, how could I get ModelAndView object's value in js by using for loop?

In controller, I wrote this:

@RequestMapping(value="SearchCourse.html", method=RequestMethod.GET)
public ModelAndView searchCourse() {
    ModelAndView model = new ModelAndView("/student/SearchCourse");
    model.addObject("schoolList", schoolService.listSchool());
    return model;
}

In js, if I wrote:

${
    schoolList.get(0).getSchoolname()
}

Then, I can get the result.

However, if I wrote a for loop:

var schoolList = new Array();
for(var i = 0; i < "${schoolList.size()}"; i++) {
    alert("${schoolList.get("+i+").getSchoolname()}"); //error
}

Then, I will get an error. I know I can't get write code like the above because i misuse the syntax. But, how can I get the schoolList in js by using ModelAndView?

I want to ask, how could I get ModelAndView object's value in js by using for loop?

In controller, I wrote this:

@RequestMapping(value="SearchCourse.html", method=RequestMethod.GET)
public ModelAndView searchCourse() {
    ModelAndView model = new ModelAndView("/student/SearchCourse");
    model.addObject("schoolList", schoolService.listSchool());
    return model;
}

In js, if I wrote:

${
    schoolList.get(0).getSchoolname()
}

Then, I can get the result.

However, if I wrote a for loop:

var schoolList = new Array();
for(var i = 0; i < "${schoolList.size()}"; i++) {
    alert("${schoolList.get("+i+").getSchoolname()}"); //error
}

Then, I will get an error. I know I can't get write code like the above because i misuse the syntax. But, how can I get the schoolList in js by using ModelAndView?

• javascript
• html
• spring
• jakarta-ee

Share Improve this question Follow edited Apr 7, 2015 at 17:04 xsami 1,3301616 silver badges3232 bronze badges asked Apr 7, 2015 at 16:27 TommyQuTommyQu 53911 gold badge77 silver badges1919 bronze badges

Add a ment  | 

2 Answers 2

Sorted by: Reset to default 1

The first expression is not JavaScript, it is jstl expression. If you want access to the model in JavaScript you either need to assign values to javascript variables or return JSON objects to your requests. To assign values to javascript array, you should do something like this:

<script>
 var schoolList=new Array();
  <c:forEach items="schoolList" var="school">
      schoolList[]=${school.schoolname};
   </c:forEach>

</script>

Notice, that there is a mix of javascript and jstl in this code. This is a sample code, there might be errors.

Check the answers to the questions below which were similar to yours.

How to transfer java array to javaScript array using jsp?

How to pass array from java to javascript

Converting a Java ArrayList of strings to a JavaScript array

Thanks @jny ! I have figured it out by myself. We can simply use the code below to get the list and iterate the list.

<script>
var schoolList=${schoolList}
for(var i=0;i<schoolList.length;i++) {
  alert(schoolList[i].schoolname);
}
</script>

I want to ask, how could I get ModelAndView object's value in js by using for loop?

In controller, I wrote this:

@RequestMapping(value="SearchCourse.html", method=RequestMethod.GET)
public ModelAndView searchCourse() {
    ModelAndView model = new ModelAndView("/student/SearchCourse");
    model.addObject("schoolList", schoolService.listSchool());
    return model;
}

In js, if I wrote:

${
    schoolList.get(0).getSchoolname()
}

Then, I can get the result.

However, if I wrote a for loop:

var schoolList = new Array();
for(var i = 0; i < "${schoolList.size()}"; i++) {
    alert("${schoolList.get("+i+").getSchoolname()}"); //error
}

Then, I will get an error. I know I can't get write code like the above because i misuse the syntax. But, how can I get the schoolList in js by using ModelAndView?

I want to ask, how could I get ModelAndView object's value in js by using for loop?

In controller, I wrote this:

@RequestMapping(value="SearchCourse.html", method=RequestMethod.GET)
public ModelAndView searchCourse() {
    ModelAndView model = new ModelAndView("/student/SearchCourse");
    model.addObject("schoolList", schoolService.listSchool());
    return model;
}

In js, if I wrote:

${
    schoolList.get(0).getSchoolname()
}

Then, I can get the result.

However, if I wrote a for loop:

var schoolList = new Array();
for(var i = 0; i < "${schoolList.size()}"; i++) {
    alert("${schoolList.get("+i+").getSchoolname()}"); //error
}

Then, I will get an error. I know I can't get write code like the above because i misuse the syntax. But, how can I get the schoolList in js by using ModelAndView?

• javascript
• html
• spring
• jakarta-ee

Share Improve this question Follow edited Apr 7, 2015 at 17:04 xsami 1,3301616 silver badges3232 bronze badges asked Apr 7, 2015 at 16:27 TommyQuTommyQu 53911 gold badge77 silver badges1919 bronze badges

Add a ment  | 

2 Answers 2

Sorted by: Reset to default 1

The first expression is not JavaScript, it is jstl expression. If you want access to the model in JavaScript you either need to assign values to javascript variables or return JSON objects to your requests. To assign values to javascript array, you should do something like this:

<script>
 var schoolList=new Array();
  <c:forEach items="schoolList" var="school">
      schoolList[]=${school.schoolname};
   </c:forEach>

</script>

Notice, that there is a mix of javascript and jstl in this code. This is a sample code, there might be errors.

Check the answers to the questions below which were similar to yours.

How to transfer java array to javaScript array using jsp?

How to pass array from java to javascript

Converting a Java ArrayList of strings to a JavaScript array

Thanks @jny ! I have figured it out by myself. We can simply use the code below to get the list and iterate the list.

<script>
var schoolList=${schoolList}
for(var i=0;i<schoolList.length;i++) {
  alert(schoolList[i].schoolname);
}
</script>

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