blocks|key|446984|text|1.<a+href="index.jsp?p=products">Products</a>当用户点击产品链接时，可以直接调用products.jsp。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|446985|我的意思是，您可以保持JSP文件的名称与参数值相同。|446986|<%25
+if(request.getParameter("p")!=null)
+{+
+++String+contextPath="includes/";
+++String+p+=+request.getParameter("p");
+++p=p%2B".jsp";
+++p=contextPath%2Bp;

%25>++++

<%25@include+file="<%25=p%25>"+%25>

<%25+
+}
%25>|code-block|syntax|javascript|446987|或|446988|2.您可以使用键、值对维护外部资源文件。如下所示|446989|products++:+products.jsp|446990|customer++:+customers.jsp|446991|您可以通过编程方式从属性文件中检索JSP文件的名称。|446992|这样，您就可以轻松地更改JSP文件的名称|446993|entityMap^0|2|17|0|0|0|0|0|0|O|0|0|P|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|13|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|14|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|15|8|@]|D|@]|E|$]]|$1|O|3|P|5|6|7|16|8|@]|D|@]|E|$]]|$1|Q|3|R|5|6|7|17|8|@$9|18|A|19|B|C]]|D|@]|E|$]]|$1|S|3|T|5|6|7|1A|8|@$9|1B|A|1C|B|C]]|D|@]|E|$]]|$1|U|3|V|5|6|7|1D|8|@]|D|@]|E|$]]|$1|W|3|X|5|6|7|1E|8|@]|D|@]|E|$]]|$1|Y|3|-4|5|6|7|1F|8|@]|D|@]|E|$]]]|Z|$]]

1.<code>&lt;a href="index.jsp?p=products"&gt;Products&lt;/a&gt;</code> when user clicks on Products link,you can directly call products.jsp.

I mean u can maintain name of the JSP file same as parameter Value.

<pre><code>&lt;%
 if(request.getParameter("p")!=null)
 { 
 String contextPath="includes/";
 String p = request.getParameter("p");
 p=p+".jsp";
 p=contextPath+p;

%&gt; 

&lt;%@include file="&lt;%=p%&gt;" %&gt;

&lt;% 
 }
%&gt;
</code></pre>

or

2.you can maintain external resource file with key,value pairs.
like below

<code>products : products.jsp</code>

<code>customer : customers.jsp</code>

you can programatically retrieve the name of JSP file from properies file.

this way you can easily change the name of JSP file

blocks|key|447068|text|您正在做的是一个静态包含。静态包含是在编译时解析的，因此可能不会使用参数值，而参数值仅在执行时才知道。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|447069|你需要的是一个动态的包含：|447070|<jsp:include+page="..."+/>|code-block|syntax|javascript|447071|请注意，您应该使用JSP+EL而不是scriptlet。看起来你也在用index.jsp实现一个中央控制器。您应该使用servlet来完成此操作，并从此servlet分派到适当的JSP。或者更好的是，使用现有的MVC框架，如Stripes或Spring+MVC。|447072|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

What you're doing is a static include. A static include is resolved at compile time, and may thus not use a parameter value, which is only known at execution time.

What you need is a dynamic include:

<pre><code>&lt;jsp:include page="..." /&gt;
</code></pre>

Note that you should use the JSP EL rather than scriptlets. It also seems that you're implementing a central controller with index.jsp. You should use a servlet to do that instead, and dispatch to the appropriate JSP from this servlet. Or better, use an existing MVC framework like Stripes or Spring MVC.

blocks|key|447116|text|在页面转换时，include指令中给定的文件内容将按原样“粘贴”到使用JSP+include指令的位置。然后，将源JSP页面转换为java+servlet类。包含的文件可以是静态资源，也可以是JSP页面。通常，JSP+include指令用于包含标题横幅和页脚。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|447117|包含jsp文件语法：|447118|<%25@+include+file="relative+url">|code-block|syntax|javascript|447119|示例|447120|<%25@include+file="page_name.jsp"+%25>|447121|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

At page translation time, the content of the file given in the include directive is ‘pasted’ as it is, in the place where the JSP include directive is used. Then the source JSP page is converted into a java servlet class. The included file can be a static resource or a JSP page. Generally, JSP include directive is used to include header banners and footers. 

Syntax for include a jsp file:

<pre><code>&lt;%@ include file="relative url"&gt;
</code></pre>

Example

<pre><code>&lt;%@include file="page_name.jsp" %&gt;
</code></pre>

blocks|key|661501|text|您可以使用这样的参数|type|unstyled|depth|inlineStyleRanges|entityRanges|data|661502|<jsp:include+page='about.jsp'>
++++<jsp:param+name="articleId"+value=""/>
</jsp:include>|code-block|syntax|javascript|661503|和|661504|在about.jsp中，您可以获取参数|661505|<%25String+leftAds+=+request.getParameter("articleId");%25>|661506|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|S|8|@]|9|@]|A|$E|F]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

You can use parameters like that

<pre><code>&lt;jsp:include page='about.jsp'&gt;
 &lt;jsp:param name="articleId" value=""/&gt;
&lt;/jsp:include&gt;
</code></pre>

and

in about.jsp you can take the paramter 

<pre><code>&lt;%String leftAds = request.getParameter("articleId");%&gt;
</code></pre>

blocks|key|661557|text|出于某种原因，我还不明白，在我的index.jsp中使用<%25@include+file="includes/footer.jsp"+%25>之后，在register.jsp等其他jsp文件中，我不得不使用<%25@+include+file="footer.jsp"%25>。如您所见，不再需要使用完整路径，STS已经存储了我的初始路径。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|661558|entityMap^0|G|9|S|14|20|C|2S|V|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|G|$]]

For a reason I don't yet understand, after I used <code>&lt;%@include file="includes/footer.jsp" %&gt;</code> in my <code>index.jsp</code> then in the other jsp files like <code>register.jsp</code> I had to use <code>&lt;%@ include file="footer.jsp"%&gt;</code>. As you see there was no more need to use full path, STS had store my initial path.

I am currently trying to learn JSP. My question is, at present I used to include the header and footer of the page using:

<pre><code>&lt;%@include file="includes/header.jsp" %&gt;
</code></pre>

and 

<pre><code>&lt;%@include file="includes/footer.jsp" %&gt;
</code></pre>

But now, I have separated the page content also. So, if user clicks on a page, say products, it has to load the JSP file which is situated in: <code>includes/pages/products.jsp</code>
So, the link to the user is like: <code>&lt;a href="index.jsp?p=products"&gt;Products&lt;/a&gt;</code>.

So, I have to get the p value and display the page based on it.

Following is what I have done so far.

<pre><code>&lt;%
 if(request.getParameter("p")!=null)
 { 
 String p = request.getParameter("p");
%&gt; 

&lt;%@include file="includes/page_name.jsp" %&gt;

&lt;% 
 }
%&gt;
</code></pre>

So, how do I place the value of variable "p" in position of "page_name" ?

Or, is there any other method that I could use ?

In PHP, we could use the <code>include()</code> or <code>include_once()</code>. I am bit stuck in this JSP. :(

Include another JSP file

我目前正在尝试学习JSP。我的问题是，目前我使用以下命令来包含页面的页眉和页脚：<%@include file="includes/header.jsp" %>和<%@include file="includes/footer.jsp" %>但现在，我也分离了页面内容。因此，如果用户单击一个页面，比如产品，它必须加载位...

问包括另一个JSP文件
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问包括另一个JSP文件EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问包括另一个JSP文件
EN