JSP由浅入深(11)标记库_PHP
JSP 1.1提出了一种扩展的JSP标志的方法，这种方法命名为“标志库”。这些库允许另外的一些类似于jsp:include 或者jsp:forward的标志，但是它们不是以jsp:为前缀的并且还附件一些特性。
为了介绍标志库，在本教程中我们使用Blazix标志库作为例子。这个标志库只能用在Blazix服务器中，这个服务器你可以免费下载。
每一个标志库都有它自己的标志库特殊的文档。为了使用标志库，你可以使用"taglib" directive来指出标志库“description”处在什么地方。对于Blazix标志库而言，directive如下：
%@ taglib prefix="blx" uri="/blx.tld" %>
上面者句中“uri”就是指出了标志库描述所在的地方。标志库的前缀是不同的。这个指令的意思是说我们可以使用blx:来使用库中的标志。Blazix标志库提供了一个blx:getProperty标志。这个标志可以允许用户编辑表单数据。现在，在GetName.jsp文件中，我们增加一个jsp:useBean并且将表单放置在blx:getProperty中：
%@ taglib prefix="blx" uri="/blx.tld" %>
jsp:useBean id="user" class="UserData" scope="session"/>
HTML>
BODY>
blx:getProperty name="user" property="*">
FORM METHOD=POST ACTION="SaveName.jsp">
What's your name?
What's your e-mail address? INPUT TYPE=TEXT NAME=email SIZE=20>BR>
What's your age? INPUT TYPE=TEXT NAME=age SIZE=4>
P>INPUT TYPE=SUBMIT>
/FORM>
/blx:getProperty>
/BODY>
/HTML>
从上面的代码中我们可以发现blx:getProperty不是以/>结尾的，而是用来结尾。这条语句将所有的表单输入区域输入到blx:getProperty中，这样它们就可以被标志库正确地修改。
接着建立一个从GetName.jsp到NextPage.jsp的连接，你将发现bean的数据自动显示在输入区域中。所以现在用户可以编辑
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