Struts version problem

Currently I am using Struts 1.2.x version and I want to upgrade it higher version. Please help to suggest whether upgrade it to 1.3 will be better or 2.0
I have tried to upgrade it to 1.3 and downloaded the entire struts 1.3.10 package. But in the blank struts war file I couldn't find the validator-rules.xml.

12:46:16,209 ERROR [ValidatorForm] No such validation method: org.apache.struts.validator.FieldChecks.validateRequired(java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionErrors, javax.servlet.http.HttpServletRequest)
org.apache.commons.validator.ValidatorException: No such validation method: org.apache.struts.validator.FieldChecks.validateRequired(java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionErrors, javax.servlet.http.HttpServletRequest)
	at org.apache.commons.validator.ValidatorAction.loadValidationMethod(ValidatorAction.java:604)
	at org.apache.commons.validator.ValidatorAction.executeValidationMethod(ValidatorAction.java:532)
	at org.apache.commons.validator.Field.validateForRule(Field.java:796)
	at org.apache.commons.validator.Field.validate(Field.java:876)
	at org.apache.commons.validator.Form.validate(Form.java:288)
	at org.apache.commons.validator.Validator.validate(Validator.java:351)
	at org.apache.struts.validator.ValidatorForm.validate(ValidatorForm.java:116)
	at org.apache.struts.chain.commands.servlet.ValidateActionForm.validate(ValidateActionForm.java:58)
	at org.apache.struts.chain.commands.AbstractValidateActionForm.execute(AbstractValidateActionForm.java:120)
	at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
	at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
	at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:305)
	at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
	at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
	at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
	at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
	at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
	at java.lang.Thread.run(Unknown Source)

Where can i get the validator-rules.xml file. The main reason for upgradtion is, since for validator framework more features were added.

Previously I have used the MyEclispe and created the web project then added the Struts 1.2 capabilities.
When I downloded the blank struts war, I have copied all the .jar files related to struts 1.3.10 and placed it in the existing lib folder.

Upgrading to Struts 2 would involve, at a minimum, completely rewriting all your JSP files. There's a Struts 1 plugin that allows the use of Struts 1 actions in Struts 2 applications, but I wouldn't bother, so you'd have to rewrite the web layer as well.