Using an if statement to decided whether or not to show a table on a jsp page

I have a parameter of user that I am setting equal to -1 if this param is not given. I only want to show the table if the parameter is fulfilled ( for instance if user = 1 ).

• so using an "if" statement.....can I j开发者_StackOverflow中文版ust do something like this:

ex:

if(user >= 1){
<table>
<tr>
.....
</tr>
</table>
}

Is this possible, or how would you recommend doing this?

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I would recommend you to use JSTL. <c:if> tag, also to set the parameter as attribute in request to use it on jsp

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Request parameters are as a Map<String, String> available by ${param} in EL. So a request parameter with the name user is available by ${param.user}.

JSTL provides the core tags like <c:if> to control the flow in the page.

So, 1 + 1 = ...

<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
...
<c:if test="${param.user > 0}">
    <table>
        ...
    </table>
</c:if>

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<% if(user >= 1){ %>

some html

<% } %>

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You shouldn't try to intermix Java scriptlets inside JSP. Use JSTL instead. You would have to import the core library <%@ taglib uri="/WEB-INF/tld/c.tld" prefix="c" %> and include jstl.jar standard.jar in your classpath which can be found on the Apache Site