simple json lib for java

有时候为了需要将一个对象或数组转成json string 给前台需要用开json util 类，为了这个类我们又必须加入一大堆的其他类(jdk1.3)，其实可以用simple json这个类库:

 

Featured downloads:
json_simple-1.1-all.zip

json_simple-1.1.jar

Overview

JSON.simple is a simple Java toolkit for JSON. You can use JSON.simple to encode or decode JSON text.

Features

• Full compliance with JSON specification (RFC4627) and reliable (see compliance testing )

• Provides multiple functionalities such as encode, decode/parse and escape JSON text while keeping the library lightweight

• Flexible, simple and easy to use by reusing Map and List interfaces

• Supports streaming output of JSON text

• Stoppable SAX-like interface for streaming input of JSON text (learn more )

• Heap based parser

• High performance (see performance testing )

• No dependency on external libraries

• Both of the source code and the binary are JDK1.2 compatible

Getting Started

Note: You need to put the latest json_simple-1.1.jar in your CLASSPATH before compiling and running the example codes.

• Encoding Examples
• Decoding Examples
• Escaping Examples
• JSP and AJAX Examples

Mapping Between JSON and Java Entities

JSON	Java
string	java.lang.String
number	java.lang.Number
true|false	java.lang.Boolean
null	null
array	java.util.List
object	java.util.Map

JSON.simple maps entities from the left side to the right side while decoding or parsing, and maps entities from the right to the left while encoding. While decoding, default concrete class of java.util.List is org.json.simple.JSONArray and default concrete class of java.util.Map is org.json.simple.JSONObject. While encoding, other classes that are not listed on the right side of the table need to implement JSONAware or JSONStreamAware (streaming only) to customize JSON outputs. In such cases, JSON.simple calls JSONAware.toJSONString() or JSONStreamAware.writeJSONString() to determine the resulting JSON text.

Developer's Guide

• Build With Ant
• Build With Eclipse
• The JSON Lexer

JSON.simple in Projects

• Vuze (Azureus)
• Apache MyFaces
• Apusic OperaMasks
• co-ode-owl-plugins
• google-caja
• GV
• LabKey Server
• Mozilla Bespin
• MTS
• PhyloWidget
• XBrain
• ZK.forge

JSON.simple in Publications

• O'Reilly - Ajax On Java
• Ajax development case study
• Tutorial from webucator
• A Review of 5 Java JSON Libraries (Rob@Rojotek)

Next Steps

• Auto marshalling and unmarshalling utils for Java Beans

Links

• JSON.org
• Initial version of JSON.simple