importcom.fasterxml.jackson.databind.ObjectMapper;publicclassJsonExample{publicstaticvoidmain(String[]args){Useruser=newUser("Alice",30);ObjectMapperobjectMapper=newObjectMapper();try{StringjsonString=objectMapper.writeValueAsString(user);System.out.println(jsonString);}catch(Exceptione){e.printStackTrace()...
在实际开发中,对象转JSON的过程可以看作是一个旅行,从一个对象出发,经过转换,最终到达一个JSON的目的地。以下是该过程的旅行图: GSONJSON StringOutputPerson Start Create a Person object Convert Call gson.toJson() Convert to JSON string End Output JSON String Object to JSON Conversion Journey 总结 本文...
public class JsonObjectConvert {private StringBuffer sf = null;public String SimpleObjectToJson(Object o){sf = new StringBuffer("{");//sf.append(o.getClass().getSimpleName());Field field[] = o.getClass().getDeclaredFields();String content = "";for(Field f : field ){try {f.setAcce...
//1、使用JSONObject JSONObject jsonObject=JSONObject.fromObject(objectStr); Student stu=(Student)JSONObject.toBean(jsonObject, Student.class); //2、使用JSONArray JSONArray jsonArray=JSONArray.fromObject(arrayStr); //获得jsonArray的第一个元素 Object o=jsonArray.get(0); JSONObject jsonObject2=J...
import org.json.JSONObject; import java.util.HashMap; import java.util.Map; public class ObjectToJsonExample { public static void main(String[] args) { User user = new User("Alice", 30); // 假设这里有一个方法可以将User转换为Map Map<String, Object> userMap = convertToMap(user...
可在属性上增加 @JsonFormat(timezone="GMT+8",pattern="yyyy-MM-dd"或 @JsonFormat(shape=Json...
gson.toJson(obj); 输出结果 {"first_field":"aaaa","SecondField":"bbbbb"} 原文-http://www.mkyong.com/java/how-do-convert-java-object-to-from-json-format-gson-api/ Json Official site – http://www.json.org/ Json in Wiki – http://en.wikipedia.org/wiki/JSON ...
1.fromJson() – Convert JSON to java object 2.toJson() – Convert Java object to JSON String Firstly i have create a maven project and add GSON dependency in pom <dependency><groupId>com.google.code.gson</groupId><artifactId>gson</artifactId><version>2.4</version></dependency> ...
When you convert java pure object, 'class' parameter will be added into JSON object: package mypackage; @JsonClass public class Foo { String str = "Hello"; int num = 1; } StringBuilder sb = new StringBuilder(); try { JsonWriter.write(new Foo(), sb); System.out.println(sb.toString(...
Convert Java to JSON & JSON to Java package com.hmkcode; import com.google.gson.Gson; import com.hmkcode.vo.Article; public class App { public static void main( String[] args ) { Gson gson = new Gson(); // Java --> JSON ...