title: Convert JsonObject to String
body: <pre class="lang-js prettyprint-override"><code>{
      "data": 
      {
          "map":
          {
              "allowNestedValues": true,
              "create": "2012-12-11 15:16:13",
              "title": "test201212110004",
              "transitions": []
          }
      },
      "msg": "success",
      "code": "0"
  }
  </code></pre>
  
  <p>Above is a <code>JsonObject</code>, the <code>data</code> is a <code>JsonObject</code>.</p>
  
  <p>How to convert it to a <code>String</code> like <code>"msg":"success"</code> as you know, i can't directly add a double quotes outside <code>data</code>'s value.</p>