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JSON-taglib是一套JSP標簽庫用于在JSP代碼中輸出JSON格式的數據。
JSON-taglib利用json:array, json:object和json:property來實現數據格式的轉換。

下面是具體用法：

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.

調用方法：

    
          <%@taglibprefix=
        
          "json"
        
          uri=
        
          "http://www.atg.com/taglibs/json"
        
          %>
        
          <json:object>
        
          <json:propertyname=
        
          "itemCount"
        
          value=
        
          "${cart.itemCount}"
        
          />
        
          <json:propertyname=
        
          "subtotal"
        
          value=
        
          "${cart.subtotal}"
        
          />
        
          <json:arrayname=
        
          "items"
        
          var=
        
          "item"
        
          items=
        
          "${cart.lineItems}"
        
          >
        
          <json:object>
        
          <json:propertyname=
        
          "title"
        
          value=
        
          "${item.title}"
        
          />
        
          <json:propertyname=
        
          "description"
        
          value=
        
          "${item.description}"
        
          />
        
          <json:propertyname=
        
          "imageUrl"
        
          value=
        
          "${item.imageUrl"
        
          />
        
          <json:propertyname=
        
          "price"
        
          value=
        
          "${item.price}"
        
          />
        
          <json:propertyname=
        
          "qty"
        
          value=
        
          "${item.qty}"
        
          />
        
          </json:object>
        
          </json:array>
        
          </json:object>

JOSN輸出結果：

    
          {
        
          itemCount:2,
        
          subtotal:
        
          "$15.50"
        
          ,
        
          items:[
        
          {
        
          title:
        
          "TheBigBookofFoo"
        
          ,
        
          description:
        
          "BestsellingbookofFoobyA.N.Other"
        
          ,
        
          imageUrl:
        
          "/images/books/12345.gif"
        
          ,
        
          price:
        
          "$10.00"
        
          ,
        
          qty:1
        
          },
        
          {
        
          title:
        
          "JavascriptPocketReference"
        
          ,
        
          description:
        
          "Handypocket-sizedreferencefortheJavascriptlanguage"
        
          ,
        
          imageUrl:
        
          "/images/books/56789.gif"
        
          ,
        
          price:
        
          "$5.50"
        
          ,
        
          qty:1
        
          }
        
          ]
        
          }

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

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在JSP代碼中輸出JSON格式數據

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