simple json lib for java

JSON.simple简介与使用

最新推荐文章于 2025-11-25 11:19:49 发布

最新推荐文章于 2025-11-25 11:19:49 发布 · 91 阅读

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#json #Java #Ajax #zk #performance

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本文介绍了JSON.simple，这是一个简单且轻量级的Java工具包，用于JSON数据的编码与解码。它完全遵循JSON规范（RFC4627），并提供灵活易用的功能，如JSON文本的编码、解析及转义等。

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.

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.