java如何将json的数据转换为map或者list类型的？ JAVA中json字符串如何转化为map对象获取数据？
java\u5982\u4f55\u5c06json\u7684\u6570\u636e\u8f6c\u6362\u4e3amap\u6216\u8005list\u7c7b\u578b\u7684\uff1fJSONArray j=JSONArray.fromObject(str);
List l=JSONArray.toList(j);
\u6211\u4eec\u9700\u8981\u5148\u628ajson\u5b57\u7b26\u4e32\u8f6c\u5316\u4e3anet.sf.json.JSONObject\u5bf9\u8c61\uff0cjava\u4e2d\u8fd9\u6837\u5c31\u53ef\u4ee5\u5b8c\u6210json\u5b57\u7b26\u4e32\u5230Map\u7684\u8f6c\u6362\u4e86\u3002
1.\u5c06\u6570\u7ec4\u8f6c\u6362\u4e3aJSON\uff1aString[] arr = {"asd","dfgd","asd","234"};JSONArray jsonarray = JSONArray.fromObject(arr);System.out.println(jsonarray);
2.\u5bf9\u8c61\u8f6c\u6362\u6210JSON\uff1aUserInfo user = new UserInfo(1001,"\u5f20\u4e09");JSONArray jsonArray = JSONArray.fromObject(user);System.out.println( jsonArray );
3.\u628aMap\u8f6c\u6362\u6210json\uff0c \u8981\u4f7f\u7528jsonObject\u5bf9\u8c61\uff1aMap map = new HashMap();map.put("userId", 1001);map.put("userName", "\u5f20\u4e09");map.put("userSex", "\u7537");JSONObject jsonObject = JSONObject.fromObject(map);System.out.println(jsonObject);
4.\u628aList\u8f6c\u6362\u6210JSON\u6570\u636e\uff1aList list = new ArrayList();UserInfo user = new UserInfo(1001, "\u5f20\u4e09");list.add(user);list.add(user);list.add(user);JSONArray jsonArray = JSONArray.fromObject(list);System.out.println(jsonArray);
5.
j=JSONArray.fromObject(str);
List
l=JSONArray.toList(j);
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