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How-to articles, tricks, and solutions about JSON

Convert a JSON String to a HashMap

Here is an example of how you can convert a JSON string to a HashMap in Java:

json java dictionary

Convert JSON to Map

You can use the Gson library to convert a JSON string to a Map in Java.

json java parsing collections

Converting JSON data to Java object

To convert JSON data to a Java object, you can use the fromJson method of the Gson class.

json java jackson gson

Date format Mapping to JSON Jackson

You can use the @JsonFormat annotation to specify the format of date fields in a JSON payload when serializing or deserializing using Jackson.

json java date jackson pojo

Facebook Graph API, how to get users email?

To get the email of a user through the Facebook Graph API, you will need to follow some steps.

php json facebook facebook-graph-api

Get a JSON object from a HTTP response

To get a JSON object from a HTTP response in Java, you can use the JSONObject class from the org.json library.

json java android

How do I write JSON data to a file?

To write JSON data to a file in Python, you can use the json module.

json python

How do you return a JSON object from a Java Servlet

To return a JSON object from a Java Servlet, you can use the following steps:

json java servlets

How Does the Access-Control-Allow-Origin Header Work

Read this tutorial and learn about how the Access-Control-Allow-Origin response header works. Also, read about CORS, the origin, and non-simple requests.

javascript json link http

How should I escape strings in JSON?

In JSON, certain characters must be escaped in strings.

json java escaping