如何使用杰克逊将json数组转换为Java hashmap

如何使用杰克逊将json数组转换为Java hashmap

这是一个揭示想法的解决方案：

public class JacksonSerializer {    public static final String INPUT = "{n" + "    "menu": [n" + "        {n" + " "1": "sql",n" + " "2": "android",n" + " "3": "mvc"n" + "        }n" + "    ]n" + "}";    public static class MenuItems {        Map<String, String> menu = Maps.newHashMap();    }    public static class MenuItemsDeserializer extends JsonDeserializer<MenuItems> {        @Override        public MenuItems deserialize(org.prehaus.jackson.JsonParser jsonParser,   DeserializationContext deserializationContext)     throws IOException, JsonProcessingException { JsonNode node = jsonParser.getCodec().readTree(jsonParser); final JsonNode elems = node.getElements().next().getElements().next(); final Map<String, String> map = Maps.newHashMap(); final Iterator<Map.Entry<String, JsonNode>> it = elems.getFields(); while (it.hasNext()) {     final Map.Entry<String, JsonNode> entry = it.next();     map.put(entry.getKey(), entry.getValue().asText()); } final MenuItems menuItems = new MenuItems(); menuItems.menu = map; return menuItems;        }    }    public static void main(final String[] args) throws IOException {        ObjectMapper mapper = new ObjectMapper();        SimpleModule module = new SimpleModule("SimpleModule",     new Version(1,0,0,null));        module.addDeserializer(MenuItems.class, new MenuItemsDeserializer());        mapper.registerModule(module);        MenuItems menuItems = mapper.readValue(INPUT, MenuItems.class);    }}