When working with JSON in Java using the Gson library, we have several options at our disposal for converting raw JSON into other classes or data structures that we can work with more easily. For example, we canconvert JSON strings to aMap<String, Object>orcreate a custom class with mappings...
"+"'Steve' : {'name': 'Steven Waugh'}}";Gsongson=newGson();TypeempMapType=newTypeToken<Map<String, Employee>>() {}.getType(); Map<String, Employee> nameEmployeeMap = gson.fromJson(jsonString, empMapType); Assert.assertEquals(3, nameEmployeeMap.size()); Assert.assertEquals...
You can convert JSON String to Java object in just 2 lines by using Gson as shown below : Gson g = new Gson(); Player p = g.fromJson(jsonString, Player.class) You can also convert a Java object to JSON by using the toJson() method as shown below String str = g.toJson(p); ...
This example converts a JavaMapto a JSON string using Jackson. MapToJsonExample.java packagecom.mkyong.json.jackson;importcom.fasterxml.jackson.core.JsonProcessingException;importcom.fasterxml.jackson.databind.ObjectMapper;importjava.util.HashMap;importjava.util.Map;publicclassMapToJsonExample{publicstaticv...
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 String json = gson.toJson(createArticle()); System.out.println("toJson: "+json); ...
csvToJson.fieldDelimiter(',') .getJsonFromCsv(fileInputName);Trim header fieldThe content of the field header is cut off at the beginning and end of the string. E.g. " Last Name " -> "Last Name".Trim header field with whitespaces...
Step 3: Convert java object to json using gson Convert object to json string in java we will use toJson() method of GSON library . package com.jp.json; import com.google.gson.Gson; public class ObjectToJSON { public static void main(String[] args) { ...
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. ...
Studentstudent=gson.fromJson(jsonString,Student.class); Copy Example importcom.beginnersbug.example.model.Student;importcom.google.gson.Gson;publicclassConvertJsonToJava{publicstaticvoidmain(String[]args){try{StringjsonString="{\"studentId\":\"001\",\"studentName\":\"Rajesh\",\"schoolName\":\...
4. Convert JSON to Java object using Jackson A simple JSON string. {"name":"mkyong","age":20}Copy ConvertObjectToJsonExample2.java packagecom.mkyong.json.jackson.tips;importcom.fasterxml.jackson.core.JsonProcessingException;importcom.fasterxml.jackson.databind.ObjectMapper;importcom.mkyong.json.model...