List<String> list = new ArrayList<>();
list.add("{'county':'china','age':18}");
list.add("{'county':'japan','age':28}");
String data = JSON.toJSONString(list,SerializerFeature.WriteNullListAsEmpty);
System.out.println(data);
结果：
标签：格式化,list,add,county,json,java,data From： https://www.cnblogs.com/chenchengzi/p/17651713.html