struts 2 url validation example

by Online Tutorials Library July 14, 2022

Struts 2 url validation example

The url validator checks that given value is string and a valid url. It can be used in website url, reciprocal links etc.

Parameters of url validator

There is only 1 parameter defined for url validator.

Parameter	Description
fieldName	specifies the field name that is to be validated. It is required in Plain-Validator only.

Example of url validator

 <validators>  <!– Plain Validator Syntax –>          <validator type=”url”>              <param name=”fieldName”>website</param>              <message>Invalid website url</message>          </validator>      </validators> 

 <validators>   <!– Field Validator Syntax –>   <field-validator type=”url”>          <field name=”website”>              <message>Invalid website url</message>          </field> </field-validator>  </validators> 

Full example of url validator

1) Create index.jsp for input

This jsp page creates a form using struts UI tags. It receives name, password and email id from the user.

index.jsp

 <%@ taglib uri=”/struts-tags” prefix=”s” %> <html> <head> <STYLE type=”text/css”> .errorMessage{color:red;} </STYLE> </head> <body>  <s:form action=”register”> <s:textfield name=”url” label=”Website URL”></s:textfield> <s:submit value=”register”></s:submit> </s:form>  </body> </html> 

2) Create the action class

This action class inherits the ActionSupport class and overrides the execute method.

RegisterAction.java

 package com.tutoraspire;  import com.opensymphony.xwork2.ActionSupport;  public class Register extends ActionSupport{ private String url;  public String getUrl() { return url; }  public void setUrl(String url) { this.url = url; }  public String execute(){ return “success”; }  }  

3) Create the validation file

Here, we are using bundled validators to perform the validation.

Register-validation.xml

 <?xml version=”1.0″ encoding=”UTF-8″?>    <!DOCTYPE validators PUBLIC    “-//OpenSymphony Group//XWork Validator 1.0.2//EN”    “http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd”>    <validators>      <field name=”url”>   <field-validator type=”requiredstring”>   <message>URL can’t be blank</message>   </field-validator>   <field-validator type=”url”>   <message>URL must be correct e.g. https://tutoraspire.com</message>   </field-validator>   </field>         </validators> 

4) Create struts.xml

This xml file defines an extra result by the name input, and an interceptor jsonValidatorWorkflowStack.

struts.xml

 <?xml version=”1.0″ encoding=”UTF-8″ ?> <!DOCTYPE struts PUBLIC “-//Apache Software Foundation//DTD Struts Configuration 2.1//EN” “http://struts.apache.org/dtds/struts-2.1.dtd”> <struts> <package name=”default” extends=”struts-default”> <action name=”register” class=”com.tutoraspire.Register”> <result name=”input”>index.jsp</result> <result>welcome.jsp</result> </action> </package> </struts>      

5) Create view component

It is the simple jsp file displaying the information of the user.

welcome.jsp

 <%@ taglib uri=”/struts-tags” prefix=”s” %>  URL is:<s:property value=”url”/> 

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