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href="http://www.blogjava.net/max/archive/2006/10/18/75857.html">常用的Struts
2.0的标志（Tag）介绍</A> </DIV>
<P>在上一篇文章《<A
href="http://www.blogjava.net/max/archive/2006/10/10/74353.html">为Struts
2.0做好准备</A>》中，我过于详细地介绍了Struts 2.0开发环境和运行环境的配置，所以，本文很少涉及的以上两方面的细节。如果，您看完《<A
href="http://www.blogjava.net/max/archive/2006/10/10/74353.html">为Struts
2.0做好准备</A>》后，还有什么不明白，或者没法运行文中例子，请联系我。我的E-MAIL：Max.M.Yuan@gmail.com。<BR></P>
<P>在介绍常用标志前，我想先从总体上，对Struts 1.x与Struts 2.0的标志库（Tag Library）作比较。 </P>
<TABLE style="BORDER-TOP: #008000 2px solid; BORDER-BOTTOM: #008000 2px solid"
cellSpacing=0 cellPadding=2 border=0>
<TBODY>
<TR>
<TD
style="FONT-WEIGHT: bold; BORDER-BOTTOM: #008000 1px solid; HEIGHT: 21px; BACKGROUND-COLOR: #ccffcc"> </TD>
<TD
style="FONT-WEIGHT: bold; BORDER-BOTTOM: #008000 1px solid; HEIGHT: 21px; BACKGROUND-COLOR: #ccffcc">Struts
1.x</TD>
<TD
style="FONT-WEIGHT: bold; BORDER-BOTTOM: #008000 1px solid; HEIGHT: 21px; BACKGROUND-COLOR: #ccffcc">Struts
2.0</TD></TR>
<TR>
<TD>分类</TD>
<TD>将标志库按功能分成HTML、Tiles、Logic和Bean等几部分</TD>
<TD>严格上来说，没有分类，所有标志都在URI为“/struts-tags”命名空间下，不过，我们可以从功能上将其分为两大类：非UI标志和UI标志</TD></TR>
<TR>
<TD>表达式语言（expression languages）</TD>
<TD>不支持嵌入语言（EL）</TD>
<TD>OGNL、JSTL、Groovy和Velcity</TD></TR></TBODY></TABLE><SPAN
style="FONT-SIZE: 11px; FONT-STYLE: italic">以上表格，纯属个人总结，如有所不足或错误，请不吝指正</SPAN>
<BR>
<P>好了，我要开始介绍“常用”（这里所谓的“常用”，是指在已往工作中使用Struts里经常用到的）的标志了。</P>
<P style="TEXT-ALIGN: center"></P>
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<TBODY>
<TR>
<TD
style="PADDING-RIGHT: 4px; PADDING-LEFT: 4px; PADDING-BOTTOM: 4px; PADDING-TOP: 4px; HEIGHT: 39px"><IMG
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</TD>
<TD
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align=left>要在JSP中使用Struts
2.0标志，先要指明标志的引入。通过在JSP的代码的顶部加入以下代码可以做到这点。<BR><SPAN
style="FONT-SIZE: 10pt; COLOR: #bf5f3f; FONT-FAMILY: 'Courier New'"><%@</SPAN><SPAN
style="FONT-SIZE: 10pt; COLOR: #3f7f7f; FONT-FAMILY: 'Courier New'">taglib
</SPAN><SPAN
style="FONT-SIZE: 10pt; COLOR: #7f007f; FONT-FAMILY: 'Courier New'">prefix</SPAN><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'">=</SPAN><SPAN
style="FONT-SIZE: 10pt; COLOR: #2a00ff; FONT-FAMILY: 'Courier New'">"s"
</SPAN><SPAN
style="FONT-SIZE
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