JS Create Jsonarray transmission to the background and the background of a comprehensive analysis _ basic knowledge

I have not understood the difference between Jsonarray and jsonobject, and I finally figured it out today.

The Jsonarray is an array of [] containing data, Jsonobject is an object, and the data is contained in {}.

Introduce an easy way to build a jsonarray in the foreground

 var array=[];

 for (int i=0;i<10;i++) {

  var item={};

  Item.a= "a" +i;

  item.b= "B" +i;

  Array.push (item);

 }

 Ajax:

 params:{

 data:JSON.stringify (array),

 type:1

 }

In the background can receive:

  String data=request.getparameter ("array");

  Jsonarray myarray=jsonarray.fromobject (data);

  for (int i=0;i<myarray.size (); i++) {

   jsonobject object=myarray.getjsonobject (i);

   String a = object.getstring (' a ');

   String B = object.getstring (' b ');

  }

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