Validate TextArea

In this section, you will learn how to validate your text area in struts 2. A text area contains 1 to 250 characters. It cann't support "null" value.

Validate TextArea

Validate TextArea

     

In this section, you will learn how to validate your text area in struts 2. A text area contains 1 to 250 characters. It cann't support "null" value.

For validating your text are in your application follows the certain steps:

Step 1: Create index.jsp page

 

 

 

Here is the code to be added in the index.jsp:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title>RoseIndia.Net Struts 2 Tutorial</title>
</head>

<body>
<div align="center">
<center>
<table border="0" cellpadding="0" cellspacing="0" width="400">
<tr>
<td><font color="#000080" size="5"><b>RoseIndia.net Struts 2 Tutorials</b><br>
&nbsp;&nbsp;&nbsp;</font></td>
</tr>
<tr>
<td><font color="#000080"><b>Select the following links to test the
examples</b></font></td>
</tr>
<tr>
<td>

<ul>
<li><a href="roseindia/characterLimit.action">Characters and limiting Example</a></li>
</ul>


</td>
</tr>
<tr>
<td><font color="#000080">&nbsp;<br>
&nbsp;<br>
&nbsp;<br>
Visit <a href="http://www.roseindia.net">http://www.roseindia.net</a>
for latest tutorials</font></td>
</tr>
</table>
</center>
</div>
<p align="center">&nbsp;</p>
</body>
</html>

Step 2: Create an action mapping in the struts.xml file. 

Here is the code to be added in the struts.xml:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
<!-- Rose India Struts 2 Tutorials -->
<constant name="struts.enable.DynamicMethodInvocation" value="false" />
<constant name="struts.devMode" value="true" />

<package name="roseindia" namespace="/roseindia" extends="struts-default">

<action name="characterLimit">
<result>/pages/chatQuestion/limitedCharacter.jsp</result>
</action>

<action name="characterLimit1" class="net.roseindia.limitedCharacterAction">
<result name="error">/pages/chatQuestion/limitedCharacter.jsp</result>
<result name="success">/pages/chatQuestion/limitedCharacterSuccess.jsp</result>
</action>


</package>


<!-- Add packages here -->

</struts>

Step 3: Create a JSP page that contains text area and submit button:

Here is the code to be added in the limitedCharacter.jsp:

<%@ taglib prefix="s" uri="/struts-tags" %>

<html>
<head>
<title>Limited Characters in Text Area</title>
<s:head theme="ajax" />
</head>
<body>

<s:form action="characterLimit1" method="POST" validate="true">
<s:textarea name="summary1" label="Brief Summary" rows="6" cols="40"/>
<s:submit value="Save" align="center" />
</s:form>

</body>
</html>

Step 4: Create an action class:

Here is the code to be added in thelimitedCharacterAction.java:

package net.roseindia;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import java.io.PrintStream;
import java.util.List;
import java.util.*;

public class limitedCharacterAction extends ActionSupport{
private String summary1;

public String getSummary1() {
return summary1;
}

public void setSummary1(String summary1) {
this.summary1 = summary1;
}

public String execute() throws Exception{
String summaryText = getSummary1();
long countSummaryText = summaryTextcount(summaryText);
System.out.println("countSummaryText:"+countSummaryText);
if (countSummaryText >0 && countSummaryText < 250){
return SUCCESS;
}
else{
if(getSummary1().equals(""))
addFieldError("summary1","Brief Summary is required.");
if((countSummaryText > 250))
addFieldError("summary1","Brief Summary must be 1 to 250 Charaters");
return ERROR;
}
}

private static long summaryTextcount(String str){
return str.length();
}
}

Step 5: Create a JSP page that contains the inputted text in the textarea:

Here is the code to be added in limitedCharacterSuccess.jsp:

<%@ taglib prefix="s" uri="/struts-tags"%>

<html>
<head>
<title>Limited Characters in Text Area</title>

<link href="<s:url value="/css/main.css"/>" rel="stylesheet"
type="text/css"/>
</head>
<body>

<b>Brief Summary: </b><s:property value="summary1" /><br>
</body>

</html>

Output:

When you click the "Save" command button with out any data then you get:

If you enter more than 250 characters then you get :

If you enter your text between 1 to 250 characters then you get:

     

Tutorials

  1. Validations using Struts 2 Annotations
  2. Struts 2 Features
  3. Struts 2 - History of Struts 2
  4. Struts 2 Architecture - Detail information on Struts 2 Architecture
  5. Download and Installing Struts 2
  6. Struts 2 Hello World Application Example, Learn how to develop Hello World application in struts 2.
  7. Developing JSP, Java and Configuration for Hello World Application
  8. Struts Configuration file - struts.xml
  9. Introduction to Struts 2 Tags
  10. Struts2 Actions
  11. Static Parameter
  12. Accessing Session Object
  13. Access Request and Response
  14. Control Tags-If / Else If / Else
  15. Append Tag (Control Tags) Example
  16. Generator Tag (Control Tags) Example
  17. Generator Tag (Control Tags) Using Count Attributes
  18. Generator Tag (Control Tags) Using an Iterator with Id Attributes
  19. Iterator Tag (Control Tags) Example
  20. Merge Tag (Control Tags) Example
  21. Subset Tag (Control Tags) Example
  22. Subset Tag (Control Tags) Example Using Count
  23. Subset Tag (Control Tags) Example Using Start
  24. Action Tag (Data Tag) Example
  25. Bean Tag (Data Tag) Example
  26. Date Tag (Data Tag) Example
  27. Include Tag (Data Tag) Example
  28. Param Tag (Data Tag) Example
  29. Set Tag (Data Tag) Example
  30. Text Tag (Data Tag) Example
  31. Property Tag (Data Tag) Example
  32. Checkbox Tag (Form Tag) Example
  33. Checkboxlist Tag (Form Tag) Example
  34. Datetimepicker Tag (Form Tag) Example
  35. Doubleselect Tag (Form Tag) Example
  36. File Tag (Form Tag) Example
  37. Form Tag Example
  38. Label Tag (Form Tag) Example
  39. Optiontransferselect Tag (Form Tag) Example
  40. Optgroup Tag (Form Tag) Example