How to copy java Object Array into javascript Array (of Objects)

[forums UseR]

Hello,

I am fairly new to javascript objects. I have a java object array. I have to copy this array into javascript object array, to print as a table.

So far, I have this:

var jsArray = <%=lineArray%>;

and this doesn't work...

lineArray is an array of java objects.

Can anybody let me know how to accomplish this...

Thanks a lot!

[Bear Bibeault]

srinivas chary wrote:var jsArray = <%=lineArray%>;

Of course that doesn't work. All that is going to do is to spit out the .toString() result of the array into the HTML stream. Not a useful thinkg to do. Look at the HTML being sent to the browser. Is it what you expected?

Remember that a JSP is just a template that runs on the server in order to create an HTML page to be sent to the browser. Please read this article to understand how JSP operates.

JavaScript and Java cannot interact. They run on completely different machines at completely different times. Rather, you use JSP to create the JavaScript code that recreates the data in JavaScript syntax.

[forums UseR]

I agree with what you just said. I already know that.

JSP returns the array, which am storing in the session. I can print the size of array using "alert" .

Problem is how to print this array of objects in a table using JavaScript. Is JSON the way to go? Can anybody point to a simple JSON example...

Thanks

[Bear Bibeault]

Sure, JSON would make this relatively easy as it can represent a JavaScript array nicely.

[forums UseR]

I could copy a simple java array to javascript array:

I followed this logic

<%
String[] params = request.getParameterValues("someField");
if(params != null) { %>
<script>
var params = new Array(<%
for(int i = 0; i < params.length; i++) {
  out.print("\""+params[i]+"\"");
  if(i+1 < params.length) {
    out.print(",");
  }
}
%>);
</script>
<% } %>

http://forums.devshed.com/javascript-development-115/passing-array-from-jsp-to-javascript-53627.html

Is there such a simple way to copy Objects aswell?

[Bear Bibeault]

Scriptlets? In 2010? Why are you not using the JSTL and EL?

[forums UseR]

Bear Bibeault wrote:Scriptlets? In 2010? Why are you not using the JSTL and EL?

The problem is not the JSP itself.

Does JSTL & EL allow me to do this

	var arrayJS = new Array(<%
	for(int i = 0; i < javaArray.length; i++) {
	  out.print("\""+javaArray[i]+"\"");
	  if(i+1 < javaArray.length) {
		out.print(",");
	  }
	}

with Objects?

[Bear Bibeault]

Much more easily.

[forums UseR]

My problem boils down to declaring an array, something like this:

var myCars=new Array("Saab","Volvo","BMW");

but with custom objects instead of strings.

Can anybody share syntax for declaring an array of custom objects (similar to Pojos)...

[Bear Bibeault]

You need to figure out how to represent the objects in JavaScript notation, and then write a JSP to produce that notation.

[forums UseR]

Here is what solved my problem:

http://stackoverflow.com/questions/1290131/javascript-how-to-create-an-array-of-object-literals-in-a-loop

P.S. Don't reply if your intention is to hijack the thread or mislead or mock.