I have an object MobilePhone with fields (String brand and name, int ram and rom) that I want to convert to a Json string. I try doing so like this public static void main(String[] args) { MobilePhone mp = new MobilePhone(); mp.setBrand("iPhone"); mp.setName("X"); ...
public static void main( String[] args ) { Gson gson = new Gson(); // Java --> JSON String json = gson.toJson(createArticle()); System.out.println("toJson: "+json); // JSON --> Java Article article = gson.fromJson(json, Article.class); System.out.println("fromJson: "+artic...
Gson is a Java library that can be used to convert Java Objects into their JSON representation. It can also be used to convert a JSON string to an equivalent Java object. Gson can work with arbitrary Java objects including pre-existing objects that you do not have source-code of. ...
3.1. Convert Java Object to JSON StringTo convert a Java object to a JSON string, use the Gson instance to call the function toJson() and pass the object.Gson gson = new Gson(); User user = new User(); String json = gson.toJson(user);...
* Convert java object to json. */ publicclassGsonTest { publicstaticvoidmain(String[] args) { People p =newPeople(); p.setAge(20); p.setName("People"); p.setSetName(true); Gson gson =newGson(); System.out.println(gson.toJson(p)); ...
publicstaticvoidmain(String[]args) { Gsongson=newGson(); Map<String,Object>map=newHashMap<>(); map.put("name","Tom"); map.put("age",23); Stringjson=gson.toJson(map); System.out.println(json); // {"name":"Tom","age":23} ...
public static String convertObject2Json(Object object) { gson=new Gson(); return gson.toJson(object); } /** *将Json转换成Java对象 * @param inputStream 要转换成Java对象的inputStream * @param javaBean List获取Map中所包括的javaBean * @param convertFlag 转换类型标识 ...
valjsonString ="{ \"age\": 22, \"height\" : 1.8, \"profession\":\"Student\", \"at_room\": false, \"gender\": \"male\",\"pictures\": []}" When I try to convert this string to a JSON Object, by doing valjsonData = JsonParser().parse(jsonString).as...
fromJson(s, Map.class); } public static Map<String, Object> convert(Object o) { Type type = new TypeToken<Map<String, Object>>() { }.getType(); return JSONObject.parseObject(JSON.toJSONString(o), type); } } 再次测试结果: {timestamp=1668394335647} 可以看到结果仍然保留了原先long格式的...
使用Gson的第一步是创建实例, 想把类转成json字符串, 则调用toJson。先设计下它的api: publicclassGson{privatestaticfinalStringJSON_NULL="null";publicGson(){}publicStringtoJson(Objectsrc){if(src==null){returnJSON_NULL;}returntoJson(src,src.getClass());}publicStringtoJson(Objectsrc,TypetypeOfSrc...