Answer Posted / tarun

The validation in struts is done by 2 ways. one is
programmatic validation and Declarative validation. I
programmatic validation we override the
validate(ActionMapping am, HttpServletRequest req) method
provided by ActionClass. This method returns the ActionErros.
For Example :

public ActionErrors validate(ActionMapping am,
HttpServletRequest req){
ActionErrors ae = new ActionErrors();
if(username==null ||
username.equals("")){ae.add("unameError", new
ActionMessage("uname.empty"));}

if(password==null || password.equals("")){
ae.add("passError", new ActionMessage("pass.empty"));
}else if(password.length()<5){
ae.add("passError", new ActionMessage("pass.minlength"));
}
return ae;
}
The values of pass.minlength , pass.empty, uname.empty will
be described in the properities file.

And in the case of declarative validation we extend the form
bean class from anyone of these classes DynaValidatorForm,
DynaValidatorActionForm

the first two classes are defined in
org.apache.struts.validator.*;
In this case we need validator.xml and validator-rules.xml
and properties file.

Does apache tomcat use struts?

505

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How is the action mapping specified?

547

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Give the details of xml files used in validator framework?

585

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What does it cost to replace struts?

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How do struts work?

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Can we handle exceptions in Struts programmatically?

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What is structs 2 validation framework?

563

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What is xml based validation in struts2?

556

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What is difference between struts1 and struts2?

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What is the difference in using Action interface and ActionSupport class for our action classes, which one you would prefer?

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What is the use of execAndWait interceptor?

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What does modeldriven interceptor?

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What are action classes in struts?

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Which configuration files are used in struts?

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Why struts 1 classes are not thread safe whereas struts 2 classes are thread safe?

501

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