在JSP中编写URL [英] Composing URL in JSP

问题描述

可以说我当前的网址是: /app.jsp?filter=10&sort=name.

Lets say my current URL is: /app.jsp?filter=10&sort=name.

我在JSP中有一个分页组件，其中应包含类似以下内容的链接:
/app.jsp?filter=10&sort=name&page=xxx.

I have a pagination component in JSP which should contain links like:
/app.jsp?filter=10&sort=name&page=xxx.

如何通过在当前URL中添加新参数来在JSP中创建有效的URL?我不想在JSP中使用Java代码，也不想以如下URL结尾:
/app.jsp?filter=10&sort=name&?&page=xxx或/app.jsp?&page=xxx等

How do I create valid URLs in JSP by adding new parameters to current URL? I dont want use Java code in JSP, nor end up with URLs like:
/app.jsp?filter=10&sort=name&?&page=xxx, or /app.jsp?&page=xxx, etc.

推荐答案

好，我找到了答案.第一个问题是我必须保留URL中的所有当前参数，并且仅更改page参数.为此，我必须遍历所有当前参数并添加我不想更改为URL的参数.然后，我添加了想要更改或添加的参数.所以我最终得到了这样的解决方案:

Ok, I found answer. First problem is that I have to preserve all current parameters in URL and change only page parameter. To do this I have to iterate over all current parameters and add those I don't want to change to URL. Then I added parameters I want to either change or add. So I ended up with solution like this:

<c:url var="nextUrl" value="">
<c:forEach items="${param}" var="entry">
    <c:if test="${entry.key != 'page'}">
        <c:param name="${entry.key}" value="${entry.value}" />
    </c:if>
</c:forEach>
<c:param name="page" value="${some calculation}" />
</c:url>

这将创建与请求中的page参数无关的漂亮且干净的URL.这种方法的好处是URL可以是任何东西.

This will create nice and clean URL independent of page parameter in request. Bonus to this approach is that URL can be just anything.

这篇关于在JSP中编写URL的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！