JSP简单入门（3）

时间:2022-05-04
本文章向大家介绍JSP简单入门（3），主要内容包括其使用实例、应用技巧、基本知识点总结和需要注意事项，具有一定的参考价值，需要的朋友可以参考一下。
3、<jsp:param>标签

当使用<jsp:include>标签和<jsp:forward>标签引入或将请求转发给的资源是一个能动态执行的程序时，还可以使用<jsp:param>标签向这个程序传递参数信息。语法如下：

<code class="hljs erb" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="xml" style=""><span class="hljs-tag" style=""><</span></span><span class="hljs-name" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-name" style="">jsp:include</span></span></span></span><span class="xml" style=""><span class="hljs-tag" style=""> </span></span><span class="hljs-attr" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-attr" style="">page</span></span></span></span><span class="xml" style=""><span class="hljs-tag" style="">=</span></span><span class="hljs-string" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-string" style="">"relativeURL | <%=</span></span></span></span></span></span><span class="ruby" style="">表达式</span><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-string" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-string" style="">%>"</span></span></span></span><span class="xml" style=""><span class="hljs-tag" style="">></span></span></span><span class="xml" style="">  
    </span><span class="hljs-tag" style=""><span class="xml" style=""><span class="hljs-tag" style=""><</span></span><span class="hljs-name" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-name" style="">jsp:param</span></span></span></span><span class="xml" style=""><span class="hljs-tag" style=""> </span></span><span class="hljs-attr" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-attr" style="">name</span></span></span></span><span class="xml" style=""><span class="hljs-tag" style="">=</span></span><span class="hljs-string" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-string" style="">"paramterName"</span></span></span></span><span class="xml" style=""><span class="hljs-tag" style=""> </span></span><span class="hljs-attr" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-attr" style="">value</span></span></span></span><span class="xml" style=""><span class="hljs-tag" style="">=</span></span><span class="hljs-string" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-string" style="">"paramterValue | <%=</span></span></span></span></span></span><span class="ruby" style="">表达式</span><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-string" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-string" style="">%>"</span></span></span></span><span class="xml" style=""><span class="hljs-tag" style=""> /></span></span></span><span class="xml" style="">  
</span><span class="hljs-tag" style=""><span class="xml" style=""><span class="hljs-tag" style=""></</span></span><span class="hljs-name" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-name" style="">jsp:include</span></span></span></span><span class="xml" style=""><span class="hljs-tag" style="">></span></span></span></span></code>

或：

<code class="hljs erb" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="xml" style=""><span class="hljs-tag" style=""><</span></span><span class="hljs-name" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-name" style="">jsp:forward</span></span></span></span><span class="xml" style=""><span class="hljs-tag" style=""> </span></span><span class="hljs-attr" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-attr" style="">page</span></span></span></span><span class="xml" style=""><span class="hljs-tag" style="">=</span></span><span class="hljs-string" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-string" style="">"relativeURL | <%=</span></span></span></span></span></span><span class="ruby" style="">表达式</span><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-string" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-string" style="">%>"</span></span></span></span><span class="xml" style=""><span class="hljs-tag" style="">></span></span></span><span class="xml" style="">  
    </span><span class="hljs-tag" style=""><span class="xml" style=""><span class="hljs-tag" style=""><</span></span><span class="hljs-name" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-name" style="">jsp:param</span></span></span></span><span class="xml" style=""><span class="hljs-tag" style=""> </span></span><span class="hljs-attr" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-attr" style="">name</span></span></span></span><span class="xml" style=""><span class="hljs-tag" style="">=</span></span><span class="hljs-string" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-string" style="">"paramterName"</span></span></span></span><span class="xml" style=""><span class="hljs-tag" style=""> </span></span><span class="hljs-attr" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-attr" style="">value</span></span></span></span><span class="xml" style=""><span class="hljs-tag" style="">=</span></span><span class="hljs-string" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-string" style="">"paramterValue | <%=</span></span></span></span></span></span><span class="ruby" style="">表达式</span><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-string" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-string" style="">%>"</span></span></span></span><span class="xml" style=""><span class="hljs-tag" style=""> /></span></span></span><span class="xml" style="">  
</span><span class="hljs-tag" style=""><span class="xml" style=""><span class="hljs-tag" style=""></</span></span><span class="hljs-name" style=""><span class="xml" style=""><span class="hljs-tag" style=""><span class="hljs-name" style="">jsp:forward</span></span></span></span><span class="xml" style=""><span class="hljs-tag" style="">></span></span></span></span></code>

4、脚本元素标签

<% %>可替代为：<jsp:scriptlet> code </jsp:scriptlet>

<%! %>可替代为：<jsp:declaration> code </jsp:declaration>

<%= %>可替代为：<jsp:expression> expression </jsp:exprission>

4、指令标签

<jsp:directive.directiveType>标签来替代<%@ directive ... %>语句（directive是指令的意思），如：<%@ page import="java.util.*"%>可替换为：<jsp:directive.page import="java.util.*" />

5、<jsp:text>标签

可以将模板内容封装在这个标签当中。

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