Struts 2 validate method not working without XML

I'm using Struts 2 for developing a web application. I have action class implementing ActionSupport. My problem is that when I enter some text error messages are not getting cleared as well as form is also not getting submitted.

Here's what I have:

CustomerAction.java:

public class CustomerAction extends ActionSupport
    {
    private Customer customer = new Customer();
    
    private String customerName;
    
    private String emailID;
    
    public String getCustomerName() {
            return customerName;
        }
    
        public void setCustomerName(String customerName) {
            this.customerName = customerName;
        }
    public Customer getCustomer() {
            return customer;
        }
    
        /**
         * @param customer
         */
        public void setCustomer(Customer customer) {
            this.customer = customer;
        }
    
    public String getEmailID() {
            return emailID;
        }
    
        public void setEmailID(String emailID) {
            this.emailID = emailID;
        }
    
    public void validate()
        {
            
            if (customerName == null)
            {
                
                addFieldError("customer.customerName","Required");
                
            }
    
            if (emailID == null || emailID.trim().equals(""))
            {
                addFieldError("customer.emailID","Email is Required");
                }

        }

Struts.xml:

    <action name="addCustomer" class="com.yell.hibu.action.CustomerAction" method="execute">
    <interceptor-ref name="params">
    
    <param name="excludeParams">dojo\..*,^struts\..*</param>
    
    </interceptor-ref>
    
    <interceptor-ref name="validation">
    
    <param name="excludeMethods">input,back,cancel,browse</param></interceptor-ref>
    
    <interceptor-ref name="workflow">
    
    <param name="excludeMethods">input,back,cancel,browse</param>
    
   </interceptor-ref>
  <result name="input">/registration.jsp</result>
 <result name="success">/success.jsp</result>
</action>
</package>
</struts>

regisration.jsp:

    <%@ taglib prefix="s" uri="/struts-tags"%>
    
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
   

 
<html>
<head>

 <title>Customer Registration Form</title>
  <s:head/>
 </head>
<body>
    <br>
    <br>
    <center>
<table width="450" align="center">
            <tr>
<td align="center" height="40"><font
style="color: #003300; font-family: fantasy !important;"><strong
                        style="color: #003300 !important;">Registration Form</strong></font></td></tr>

<tr>
<td width="1000" align="center"><br> <font color="#003300"><s:actionerror/>
<s:form action="addCustomer" id="register-form" method="post" theme="xhtml" enctype="multipart/form-data">
                        
<s:textfield name="customer.customerID" label="Customer ID" size="15"  />
<s:textfield name="customer.customerName" label="Customer Name:" maxlength="10"/>
</s:form>
</body>
</head>
</html>

Solution

To get the form submitted you need to pass the validate method not adding there errors in it. if you adding errors or errors are added via xml validation then by default framework will return the input result. it is /registration.jsp in your action. The execute method not executed then. You get that errors added because the action fields are not initialized. In the JSP you are referencing object customer and using OGNL notation the values would be set by the params interceptor inside it. So, to validate this values you should write

public void validate() {
 if (customer.getCustomerName() == null || customer.getCustomerName().trim().equals("")) {
   addFieldError("customer.customerName", "Required");
 }
}

If you don't not use the customer object in the JSP then you should use OGNL notation for the field names that references the action attributes.

then validate

public void validate() {
 if (customerName == null || customerName.trim().equals("")) {
   addFieldError("customerName", "Required");
 }
 // the same for email ID
}

thought you've got the idea.