JAVA获取json字符串字段对应的值

String jsonStr = "{'a':'b','c':'d'}";
JSONObject obj = (JSONObject) JSON.parse(jsonStr);
String bStr = (String) obj.get("a");
System.out.println(bStr);

以下为JSON的list格式转为JAVA的list对象

String attachMentsStr = jsonObj.getString("attachMentVOs");	
List attachMentsList = new ArrayList();
		
JSONArray attachMents = JSONArray.parseArray(attachMentsStr);
for(int i=0;i

以下为对象转JSON格式的字符串

JSON.toJSONString(Obj);

JSONArray.toJSONString(object);