转自:https://www.cnblogs.com/chongyou/p/7466039.html
背景:有时候string类型的数据取出来是个很标准的key、value形式,通过Gson的可以直接转成map
使用方式:
1 Gson gson = new Gson(); 2 Map<String, Object> map = new HashMap<String, Object>(); 3 map = gson.fromJson(jsonString, map.getClass());#关键 4 String goodsid=(String) map.get("goods_id"); 5 System.out.println("map的值为:"+goodsid);
jsong数据为:
{"goods_id":"140861765","cat_id":"210","goods_sn":"171073501","goods_sn_back":"171073501","goods_upc":null,"goods_name":"Lace-Up Boxer Swimming Trunks"}
是个很标准的key,value形式,转换后,在使用map分得到key,打印的map为
Gson的另外一种写法
1 public static Map<String, Object> json2map(String str_json) { 2 Map<String, Object> res = null; 3 try { 4 Gson gson = new Gson(); 5 res = gson.fromJson(str_json, new TypeToken<Map<String, Object>>() { 6 }.getType()); 7 } catch (JsonSyntaxException e) { 8 } 9 return res; 10 }
gson在mavent的配置
1 <!-- 配置gson --> 2 <dependency> 3 <groupId>com.google.code.gson</groupId> 4 <artifactId>gson</artifactId> 5 <version>2.2.4</version> 6 </dependency>