} System.out.println("JsonToObject-->"+object.toString());//把对象转为json字符串String objectjson = "";try{ objectjson=mapper.writeValueAsString(object); }catch(JsonProcessingException e) { e.printStackTrace(); } System.out.println("ObjectToJson-->"+objectjson); }publicstaticvoidGsonTest...
private static final ObjectMapper MAPPER = new ObjectMapper(); /** * 将对象转换成json字符串�?? * <p>Title: pojoToJson</p> * <p>Description: </p> * @param data * @return */ public static String objectToJson(Object data) { try { String string = MAPPER.writeValueAsString(data);...
public void jsonToJavaObject() throws IOException { String json = "{\"id\":\"application_1574306678989_4374\",\"user\":\"datadev\",\"name\":\"pf_flink_server\",\"state\":\"RUNNING\"}"; ObjectMapper mapper = new ObjectMapper(); YarnAppModel yarnAppModel = mapper.readValue(json, Ya...
User user = jsonObject.toJavaObject(User.class);
mapper.configure(Feature.WRITE_NULL_MAP_VALUES, false); mapper.setSerializationInclusion(Inclusion.NON_NULL); } } 三、QA 3.1 Q:Cause: java.lang.RuntimeException: Unable to find a usable constructor for class A:mybatis版本过低,类型不能识别,造成通用typeHandler的构造函数构造失败。之前用3.1.1时报过...
public static <T> T JSONStringToObject(String str, Class<?> collectionClass, Class<?>... elementClasses) throws IOException { ObjectMapper mapper = new ObjectMapper(); JavaType javaType = mapper.getTypeFactory().constructParametricType(collectionClass, elementClasses); ...
在Java开发中,JSON(JavaScript Object Notation)是一种广泛使用的轻量级数据交换格式。为了高效地处理JSON数据,开发者通常会选择成熟的库,其中Gson和Jackson是最受欢迎的两个。本文将深入浅出地对比介绍Gson与Jackson库的使用方法、特点、常见问题、易错点及避免策略,并提供实战代码示例。
FastJsonUtil.javapublicclassFastJsonUtil{ publicstaticStringbean2Json(Objectobj){ returnJSON.toJSONString(obj); } publicstatic<T>Tjson2Bean(StringjsonStr,Class<T>objClass){ returnJSON.parseObject(jsonStr,objClass); } } GsonUtil.javapublicclassGsonUtil{ privatestaticGsongson=newGsonBuilder().creat...
public static JsonMapper buildNonEmptyMapper() { return new JsonMapper(Inclusion.NON_EMPTY); } /** * 如果对象为Null, 返回"null". * 如果集合为空集合, 返回"[]". */ public String toJson(Object object) { try { return mapper.writeValueAsString(object); ...
json对象： var JSONObject= { "name":"Bill Gates", "street":"Fifth Avenue New York 666", "...