Question

98

How to loop through Java List< Object[]> object in JavaScript?

rated 0 times [ 101] [ 3] / answers: 1 / hits: 12285 / 11 Years ago, tue, december 10, 2013, 12:00:00

Controller

List<Object[]> permissionList = new ArrayList();

 //fill  permissionList with list of object ayyays (objetct[0] = permission id, object[1] = permission)

 model.addAttribute(permissionList, permissionList);

jsp

var allpermissionList = ${permissionList};



$.each(allpermissionList, function (index, av) {

   var id = av[0];

   vat name=av[1];

   //set values to div element

});

i can't loop through my list with js $each()... av[0] and av[1] cannot cannot obtain.

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answered 11 Years ago gregorio · Accepted Answer

Java code runs on the server. JavaScript runs on the client. They are very different languages and do not interoperate out of the box. When you need to pass data from Java to JavaScript, the easiest is to serialize it to JSON using Jackson for example.

import com.fasterxml.jackson.databind.ObjectMapper;



ObjectMapper om = new ObjectMapper();

model.addAttribute(permissionList, om.writeValueAsString(permissionList));

and in the JSP:

var allpermissionList = ${permissionList};

Note that not all Java object are serializable to JSON so the objects in your list should be simple Java types (String, Number...) or POJOs.