How could I iterate the values in ArrayList in java from java script?

Question

I have stored a bulk of objects in an ArrayList and I have set that in the request. Now I want to retrive the values in the Arraylist from my java script. Please help me with the solution

Answer 1

You can use JSON to facilitate the exchange of information between Java and Javascript. Libraries are available on both ends.

To put the elements of a List into an array, you can use Collection.toArray.

Answer 2

You need to serialize them as javascript first. There are 2 ways to do it:

1) Universal way - http://stackoverflow.com/questions/338586/a-better-java-json-library You just put in your jsp something like this:

<script...>
var myArray = <% JSON.Serialize(myArray) %>;
</script>

2) Fast and dirty:

<script...>
    var myArray = [
    <c:forEach items="${myArray}" var="item">
    {
        name = "<c:out value="${item.name}">",
        text = "<c:out value="${item.text}">"
    },
    </c:forEach>
    ];
</script>

Both will result in Javascript like this, and can be used in JS:

var myArray = [
{
    name = "Mike",
    text = "Hello world"
},
{
    name = "Max",
    text = "Hi!"
}
];