json-lib简介

JSON-lib这个Java类包用于把bean,map和XML转换成JSON并能够把JSON转回成bean和DynaBean。
下载地址：http://json-lib.sourceforge.net

还要需要的第3方包:
org.apache.commons(3.2以上版本)
org.apache.oro
net.sf.ezmorph(ezmorph-1.0.4.jar)
nu.xom

How to use json-lib

Using the JSONSerializer

JSONSerializer can transform any java object to JSON notation and back with a simple and clean interface, leveraging all the builders in JSONObject and JSONArray. To transform a java obect into JSON use JSONSerializer.toJSON(). To transform a valid JSON value (by JSON, I mean an Object implementing that interface), use toJava(). The last method is an instance method because the serializer needs special configuration to transform a JSON value to a bean class, array, List or DynaBean.

Working with arrays and collections

The simplest way to create a JSONArray from a java array or collection is through the static factory methods from JSONArray. JSONArray.fromObject() will inspect its parameter and call the correct factory or constructor.

Examples:

1. boolean[] boolArray = new boolean[]{true,false,true};   
2. JSONArray jsonArray = JSONArray.fromObject( boolArray );   
3. System.out.println( jsonArray );   
4. // prints [true,false,true]  

1. List list = new ArrayList();   
2. list.add( "first" );   
3. list.add( "second" );   
4. JSONArray jsonArray = JSONArray.fromObject( list );   
5. System.out.println( jsonArray );   
6. // prints ["first","second"]  

List list = new ArrayList();list.add( "first" );list.add( "second" );JSONArray jsonArray = JSONArray.fromObject( list );System.out.println( jsonArray );// prints ["first","second"]