java - Get json object in java

Question

At client side, I send array to sever

plan = []
plan.push
  name: "base"
  value: base
plan.push
  name: "detail"
  value: detail    
$.ajax
  type: "POST"
  url: "/plan"
  dataType: "json"
  ContentType: "application/json; charset=utf-8"
  data: plan
  success:(data) ->
    alert data

At server side, I get

"base":["[object Object]"],"result":["[object Object]"]

How I can get data of Object(base":["[object Object]"])????