Java parse JSON String to array or objectlist

问题

I'm not very familiar with Java, but got the job to reverse the following JSON-Output to a JAVA object-structure:

Sample:

{"MS":["FRA",56.12,11.67,"BUY"],"DELL":["MUC",54.76,9.07,"SELL"]}

Does someone know, how to build the Arrays / Objetcs and the code to read the strings with Java? JSON or GSON codesamples are welcome.

Thanks!

回答1:

You could try something like:

Gson gson = new Gson();

Type type = new TypeToken<HashMap<String, String>>(){}.getType();

HashMap<String, String> map = new HashMap<String, String>();
map = gson.fromJson( json, type );

Where "json" is the json string you defined.

回答2:

Jackson library is most commonly used to parse JSON in Java. Forget about regular expressions and parsing by hand, this is more complicated than you might think. It all boils down to:

String json = "{\"MS\":[\"FRA\",56.12,11.67,\"BUY\"],\"DELL\":[\"MUC\",54.76,9.07,\"SELL\"]}";

ObjectMapper mapper = new ObjectMapper();
Map obj = mapper.readValue(json, Map.class);

You can also map directly to Java beans.

来源：https://stackoverflow.com/questions/9708918/java-parse-json-string-to-array-or-objectlist