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| Struts2 Tags |
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Apache Struts is an open-source framework
used to develop Java web applications. In this
section, struts 2 form tags (UItags) will be
discussed and the rest will be included in the
subsequent issues of the magazine. Just
download the zip file “struts2UIformtags.zip”
from any link given below of each page of this
article, unzip it and copy this application to the
webapps directory of Tomcat. Start tomcat and
write http:// localhost:8080/ truts2UIformtags/
index.jsp to the address bar. You can examine
the result of each tag from this
1. Auto Completer Example
The autocompleter tag always displays a
dropdown list with the options that have at
least a partial match with entered text in the
textbox. If the user clicks on the dropdown
button then all options are shown in the
dropdown list. The autocompleter tag generates
two input fields. First is “text”, whose name is
specified with the “name” attribute and another
one is “hidden” whose name is “$(name). Key”,
where ${name} is the value in the “name”
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attribute
The autocompleter tag loads its options
asynchronously when the page loads suggested
options based on the text entered by you in
textbox. If the autoComplete attribute is set
to ‘true’ (By defalut ‘false’) then it makes
suggestions in the textbox.
Add the following code snippet into the
struts.xml file.
<action name=”autocompleter”
class=”net.javajazzup.autocompleter”>
<result>/pages/formTags/
autocompleter.jsp</result>
</action>
Create a list in the action class and populate
them with various states name of U.S. as
shown in the “autocompleter” class.
package net.javajazzup;
import
com.opensymphony.xwork2.ActionSupport;
import java.util.*;
public class autocompleter extends
ActionSupport{
private List state;
public String execute() throws Exception{
state = new ArrayList();
state.add(“Alabama”);
state.add(“Alaska”);
state.add(“Arizona”);
state.add(“Arkansas”);
state.add(“California”);
state.add(“Colorado”);
state.add(“Connecticut”);
state.add(“Delaware”);
state.add(“District of Columbia”);
state.add(“Florida”);
state.add(“Georgia”);
state.add(“Hawaii”);
state.add(“Idaho”);
state.add(“Illinois”);
state.add(“Indiana”);
state.add(“Iowa”);
state.add(“Kansas”);
state.add(“Kentucky”); |
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Feb 2008 | Java Jazz Up | 37 |
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