利用jackson解析json文件

File json = new File("/home/lstOrderBaseInfo.json");
ObjectMapper mapper = new ObjectMapper();//此处引入的是jackson中的ObjectMapper类
Map<String, Object> dataNode = mapper.readValue(json, Map.class);
List<Map<String, Object>> data =  (List<Map<String, Object>>)dataNode.get("lstOrderBaseInfo");//获取json文件中lstOrderBaseInfo这个key对应的value