A JSON library for Java

This is a simple library for parsing and outputing JSON strings. It is a wrap around the json-simple library.

The JSON objects of this library can be safely serialized with Azrael.

Build instructions

Download the source code or clone the repository. If you have Ant, you can compile by simply typing:

$ ant

at the command prompt. This will create the json-lif.jar library, which you can then include in your projects.

Usage

To parse a string

String my_string = "some JSON...":
JsonParser p = new JsonParser();
try {
  JsonElement elem = p.parse(my_string);
} catch (JsonParseException e) {
  // Do something
}

To create a JSON structure

JsonMap my_map = new JsonMap();
my_map.put("a", new JsonNumber(2));
JsonList list = new JsonList();
list.add(new JsonString("c"));
list.add(new JsonNumber(1));
my_map.put("b", list);

A JsonMap implements the java.util.Map interface, and a JsonList implements the java.util.List interface.

To query an object using a path expression

JsonElement e = JsonPath.get(my_map, "b[0]");

With the element my_map created above, this would return the JsonNumber with value 1.

Original Authors

The authors of json-simple are:

• Yidong Fang
• Chris Nokleberg
• Dave Hughes

The original code was released under the Apache 2.0 License. The json-lif library is released under the GNU LGPL 3.

Changes with respect to json-simple

• All parsed JSON elements are descendents of the JsonElement class
• The JsonPath class allows elements to be queried in a JavaScript-like syntax