In Java (using json-simple) I have successfully parsed a JSON string which was created in JavaScript using JSON.stringify. It looks like this:
{\"teq\":14567,\"
Add dependency from https://github.com/google/gson and use it like
Gson gson= new Gson();
CustomPOJOClass obj = gson.fromJson(jsonObject.toString(),CustomPOJOClass.class);
There are lot of libraries that does this. This is my suggestion. Here you can find the library
import com.google.gson.Gson;
and then do,
Gson gson = new Gson();
Student student = gson.fromJson(jsonStringGoesHere, Student.class);
Maven Dependency
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.2.4</version>
</dependency>
Some years have passed since this (now popular) question was asked. While I still agree that json-simple was my need at the time, upon reflection I think the SO community is better served by having the "checkmark" next to the Jackson solution. I am un-accepting my own answer today; Jackson is pretty great!
I think that this decent json-simple library is the victim of poor documentation. If you don't use the JSONParser (go figure!) but instead use this JSONValue.parse() method, it all works out like so:
//JSONParser parser = new JSONParser(); // DON'T USE THIS
Object obj = JSONValue.parse("A JSON string - array of objects: [{},{}] - goes here");
JSONArray arrFilings = (JSONArray)obj;
System.out.println("We can print one this way...");
System.out.println(arrFilings.get(5) + "\n");
System.out.println("We can enumerate the whole array...");
for(Object objFiling : arrFilings){
System.out.println(objFiling);
}
System.out.println("\n");
System.out.println("We can access object properties this way...");
for(Object objFiling : arrFilings){
JSONObject o = (JSONObject)objFiling; // MUST cast to access .get()
MyJSObject.fyq = o.get("fyq");
}
System.out.println("\n");
Thanks to all those who posted. Sticking with json-simple was the question and this is the only json-simple answer to-date. Jackson DOES look slick, and Amazon uses it in their SDK for Java too, sooo.... if its good enough for AWS....
use jackson library
//create ObjectMapper instance
ObjectMapper objectMapper = new ObjectMapper();
//convert json string to object
Employee emp = objectMapper.readValue(jsonData, Employee.class);
JSON string to Java Class ? you can trying fastjson:
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.1.41</version>
</dependency>
and using java code:
MyCustomJSObject object = JSON.parseObject(jsonString,MyCustomJSObject.class);