java - Using for loop inside of a JSP -


i want loop through arraylist of "festivals" , information get methods, printing out values. reason when use code, choose "0"th value , not increment loop.

if hard code values "get(1)" correct values issue syntax.

<h1>all festival information</h1>     <jsp:usebean id="allfestivals" type="java.util.arraylist" scope="session" />     <table border="1">         <tr>             <td>festival name:</td>             <td>location:</td>             <td>start date:</td>             <td>end date:</td>             <td>url:</td>         </tr>         <% for(int = 0; < allfestivals.size(); i+=1) { %>             <tr>                       <td>${allfestivals.get(i).getfestivalname()}</td>                 <td>${allfestivals.get(i).getlocation()}</td>                 <td>${allfestivals.get(i).getstartdate()}</td>                 <td>${allfestivals.get(i).getenddate()}</td>                 <td>${allfestivals.get(i).geturl()}</td>               </tr>         <% } %>     </table>

you concrete problem caused because you're mixing discouraged , old school scriptlets <% %> successor el ${}. not share same variable scope. allfestivals not available in scriptlet scope , i not available in el scope.

you should install jstl (<-- click link instructions) , declare in top of jsp follows:

<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>

and iterate on list follows:

<c:foreach items="${allfestivals}" var="festival">     <tr>               <td>${festival.festivalname}</td>         <td>${festival.location}</td>         <td>${festival.startdate}</td>         <td>${festival.enddate}</td>         <td>${festival.url}</td>       </tr> </c:foreach>

(beware of possible xss attack holes, use <c:out> accordingly)

don't forget remove <jsp:usebean> has no utter value here when you're using servlet model-and-view controller. lead confusion. see our servlets wiki page. further favour disable scriptlets following entry in web.xml won't accidently use them:

<jsp-config>     <jsp-property-group>         <url-pattern>*.jsp</url-pattern>         <scripting-invalid>true</scripting-invalid>     </jsp-property-group> </jsp-config>

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