如何使用GSON解码字符串对列表？ [英] How do I decode a list of string pairs with GSON?

问题描述

我有一个从Web请求返回的类别列表，以JSON格式显示。一个例子可能是：
$ b $

 categories：[[Cat1名称描述，cat1label]] 
  

这会如何表现在对象中？我目前有一个名为Category的对象，并使用它：

  private List< Category>类别; 
  

Category对象如下所示：

  class Category {
 private String descrName; 
私人字符串标签; 
 .. getters and setters .. 
} 
  

当试图用GSON我得到这个错误：

lockquote
01-27 21：44：46.149：ERROR / AndroidRuntime（843）：com.google.gson。 JsonParseException：期待数组，但找到对象：Category @ 437d1ff8

任何建议？我也可以让那些回来作为地图，虽然不是K，V在JSON结果中，他们会是V，K，它可以这样映射吗？

如果我将Category对象放在一起，并将其映射为：

  private List< List< String，String>>类别; 
  

但是，有没有更好的方式来表示这些数据？

Nick

解决方案

感谢您的投入。不幸的是，这是一个我正在使用的公共Web服务（Yelp v2 API），我无法更改它们返回的数据格式。这是我现在坚持的工作正常：

 私人列表<列表< String>>类别; 
  

I have a list of categories coming back from a web request, in JSON format. An example might be:

"categories":[["Descriptive Cat 1 Name","cat1label"]]

How would that be represented in the object? I currently have an object called Category, and am using it like:

private List<Category> categories;

The Category object looks something like:

class Category {
   private String descrName;
   private String label;
    .. getters and setters..
}

When attempting to decode with GSON I get this eror:

01-27 21:44:46.149: ERROR/AndroidRuntime(843): com.google.gson.JsonParseException: Expecting array but found object: Category@437d1ff8

Any suggestions? I would also be OK having those come back as a map, although instead of K,V in the JSON results they would be V,K, could it be mapped that way?

It does work if I ditch the Category object all together, and just map it as:

private List<List<String,String>> categories;

But is there a better way to represent that data?

Nick

解决方案

Thanks for the input folks. Unfortunately this is a public web service I'm utilizing (the Yelp v2 API) and I can't change the format of the data they are returning. This is what I stuck with for now which is working fine:

private List<List<String>> categories;

这篇关于如何使用GSON解码字符串对列表？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！