CODEWITHSUNDEEP
javajsp
jjnguy
jjnguy

Reputation: 138874

How do you import classes in JSP?

I am a complete JSP beginner. I am trying to use a java.util.List in a JSP page. What do I need to do to use classes other than ones in java.lang?

Upvotes: 254

Views: 659907

Answers (6)

Kevin Day
Kevin Day

Reputation: 16383

FYI - if you are importing a List into a JSP, chances are pretty good that you are violating MVC principles. Take a few hours now to read up on the MVC approach to web app development (including use of taglibs) - do some more googling on the subject, it's fascinating and will definitely help you write better apps.

If you are doing anything more complicated than a single JSP displaying some database results, please consider using a framework like Spring, Grails, etc... It will absolutely take you a bit more effort to get going, but it will save you so much time and effort down the road that I really recommend it. Besides, it's cool stuff :-)

Upvotes: 51

Birhan Nega
Birhan Nega

Reputation: 681

This is the syntax to import class

  <%@ page import="package.class" %>

Upvotes: 6

Georgios Syngouroglou
Georgios Syngouroglou

Reputation: 19944

In case you use JSTL and you wish to import a class in a tag page instead of a jsp page, the syntax is a little bit different. Replace the word 'page' with the word 'tag'.

Instead of Sandman's correct answer

<%@page import="path.to.your.class"%>

use

<%@tag import="path.to.your.class"%>

Upvotes: 11

Gaurav Varshney
Gaurav Varshney

Reputation: 512

Use Page Directive to import a Class in JSP page. Page Directive Uses 11 Different types of Attributes , One of them is "import". Page Directive with import Attribute Allows you to Mention more than one package at the same place separated by Commas(,). Alternatively you can have multiple instances of page element each one with Different package .

For Example:

 <%@ page import = "java.io.*" %>
 <%@ page import = "java.io.*", "java.util.*"%>

Note : the import attribute should be placed before the element that calls the importd class .

Upvotes: 6

Sandman
Sandman

Reputation: 9692

Use the following import statement to import java.util.List:

<%@ page import="java.util.List" %>

BTW, to import more than one class, use the following format:

<%@ page import="package1.myClass1,package2.myClass2,....,packageN.myClassN" %>

Upvotes: 374

Axeman
Axeman

Reputation: 29854

In the page tag:

<%@ page import="java.util.List" %>

Upvotes: 22

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