问题
I have a json string (the stream of social network Qaiku). How can I decode it in Java? I've searched but any results work for me. Thank you.
回答1:
As an example using Gson, you could do the following
Gson gson = new Gson();
gson.fromJson(value, type);
where value is your encoded value. The trick comes with the second parameter - the type. You need to know what your decoding and what Java type that JSON will end in.
The following example shows decoding a JSON string into a list of domain objects called Table:
http://javastorage.wordpress.com/2011/03/31/how-to-decode-json-with-google-gson-library/
In order to do that the type needs to be specified as:
Type type = new TypeToken<List<Table>>(){}.getType();
Gson is available here:
http://code.google.com/p/google-gson/
回答2:
Standard way of object de-serialization is the following:
Gson gson = new Gson();
MyType obj = gson.fromJson(json, MyType.class);
For primitives corresponding class should be used instead of MyType.
You can find more details in Gson user's guide. If this way does not work for you - probably there's some error in JSON input.
来源：https://stackoverflow.com/questions/6081595/how-to-decode-a-json-string-with-gson-in-java