drbrad / json

A JSON library for Java

Json

This is an implementation of Json for Java. Json is used for almost all data serialization on the internet. Its a lightweight fast data serialization. Wikipedia

Benchmarks

Here are some examples of this library compared to other major data serialization methods.

Serialization / Encoding

Method	Time in Mills
Bencode	57
JSON	~

Parsing

Method	Time in Mills
Bencode	83
JSON	~

Byte Size when encoded

Method	Bytes
Bencode	10134606
JSON	~

Library

The JAR for the library can be found here: Json JAR

Usage

Here are some examples of how to use the Json library. More

Json Array

//FROM LIST
ArrayList<String> l = new ArrayList<>();
JsonArray jar = new JsonArray(l);

//FROM BYTES
byte[] b; //ARRAY OF BYTES
JsonArray jar = new JsonArray(b);

//CREATE JSON
JsonArray jar = new JsonArray();

//ADD | GET
jar.add(1000);
System.out.println(jar.get(0));

Json Object | Map

//FROM MAP
HashMap<String, String> l = new HashMap<>();
JsonObject job = new JsonObject(l);

//FROM BYTES
byte[] b; //ARRAY OF BYTES
JsonObject job = new JsonObject(b);

//CREATE JSON
JsonObject job = new JsonObject();

//PUT | GET
job.put("KEY", 100);
System.out.println(job.get("KEY"));

Encoding to byte array

bar.encode();

Readable String

System.out.println(bar.toString());

Annotation Serialization

public static void main(String[] args)throws Exception {
    JsonObject json = new JsonObject();
    json.put("title", "Annotation Test");
    
    //SERIALIZE
    Foo f = (Foo) Json.fromJson(Foo.class, json);
    System.out.println(f.getTitle()); //SHOULD RETURN - "Annotation Test"

    //DE-SERIALIZE
    json = Json.toJson(f);
}

public static class Foo {

    @JsonExpose
    private String title;

    public String getTitle(){
        return title;
    }

    public void setTitle(String title){
        this.title = title;
    }
}

Annotation Serialization I/O

public static void main(String[] args)throws Exception {
    //READ
    JsonToClassReader r = new JsonToClassReader(new ByteArrayInputStream(json.encode())); //WILL WORK WITH ANY INPUT-STREAM
    Foo f = (Foo) r.readToClass(Foo.class);
    r.close();
    System.out.println(f.getTitle());

    //WRITE
    JsonFromClassWriter w = new JsonFromClassWriter(System.out); //WILL WORK WITH ANY OUTPUT-STREAM
    w.writeClass(f);
    w.flush();
}

public static class Foo {

    @JsonExpose
    private String title;

    public String getTitle(){
        return title;
    }

    public void setTitle(String title){
        this.title = title;
    }
}