在JSP代码中输出JSON格式数据

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JSON-taglib是一套JSP标签库用于在JSP代码中输出JSON格式的数据。
JSON-taglib利用json:array, json:object和json:property来实现数据格式的转换。

下面是具体用法：

Just drop the json-taglib.jar file into the WEB-INF/lib directory of your web-application.

Here's a quick example of how the taglib could be used with an AJAX e-commerce shopping cart. Check out the examples or the tutorial for full details of how to use the taglib.

调用方法：

1. <%@taglibprefix="json"uri="http://www.atg.com/taglibs/json"%>
3. <json:object>
4. <json:propertyname="itemCount"value="${cart.itemCount}"/>
5. <json:propertyname="subtotal"value="${cart.subtotal}"/>
6. <json:arrayname="items"var="item"items="${cart.lineItems}">
7. <json:object>
8. <json:propertyname="title"value="${item.title}"/>
9. <json:propertyname="description"value="${item.description}"/>
10. <json:propertyname="imageUrl"value="${item.imageUrl"/>
11. <json:propertyname="price"value="${item.price}"/>
12. <json:propertyname="qty"value="${item.qty}"/>
13. </json:object>
14. </json:array>
15. </json:object>

JOSN输出结果：

1. {
2. itemCount:2,
3. subtotal:"$15.50",
4. items:[
5. {
6. title:"TheBigBookofFoo",
7. description:"BestsellingbookofFoobyA.N.Other",
8. imageUrl:"/images/books/12345.gif",
9. price:"$10.00",
10. qty:1
11. },
12. {
13. title:"JavascriptPocketReference",
14. description:"Handypocket-sizedreferencefortheJavascriptlanguage",
15. imageUrl:"/images/books/56789.gif",
16. price:"$5.50",
17. qty:1
18. }
19. ]
20. }

Be sure to check out the examples or the tutorial for more information about how to use the taglib.
官网： http://json-taglib.sourceforge.net/

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