Struts Super Simple Introduction (III)

Write three Java classes, compiled and placed under the Tomcat 5.0\webapps truts\web-inf\classes\com\javer\test truts\ Directory

"Hellofrom.java":

Package com.javer.test.struts;

Import Javax.servlet.http.httpservletrequest;import Org.apache.struts.action.actionerror;import Org.apache.struts.action.actionerrors;import Org.apache.struts.action.actionform;import org.apache.struts.action.ActionMapping;

Public final class Hellofrom extends actionform{private String person = null;  Public String Getperson () {return person; }

public void Setperson (String person) {This.person = person; }

public void Reset (actionmapping mapping, HttpServletRequest request) {This.person = null; }

Public actionerrors Validate (actionmapping mapping,httpservletrequest request) {actionerrors errors = new Actionerror S ();

if (This.person==null | | this.person.length () <1) errors.add ("Person", New Actionerror ("    Com.javer.test.struts.hello.error "));  return errors; }}

"Hellomodel.java":

Package com.javer.test.struts;

public class hellomodel{public void Savetopersistentstore (Hellofrom hf) {System.out.println ("Hello" +hf.getperson () + "! Here you can store the data in the database!  "); }}

"Helloaction.java":

Package com.javer.test.struts;

Import Javax.servlet.http.httpservletrequest;import javax.servlet.http.HttpServletResponse;

Import Org.apache.struts.action.action;import Org.apache.struts.action.actionerror;import Org.apache.struts.action.actionerrors;import Org.apache.struts.action.actionform;import Org.apache.struts.action.actionforward;import org.apache.struts.action.ActionMapping;

Import org.apache.struts.util.MessageResources;

Import Org.apache.commons.beanutils.PropertyUtils;

Public final class Helloaction extends action{public Actionforward execute (actionmapping mapping, Actionform form, HttpServletRequest request, httpservletresponse response) t Hrows Exception {messageresources messages = getresources (request);

Actionerrors errors = new Actionerrors (); String person = (string) propertyutils.getsimpleproperty (form, ' person ');

if (Person.indexof (",")!=-1) {Errors.add ("person", New Actionerror ("Com.javer.test.struts.hello.unallowed.person",      form));      Saveerrors (request,errors);      Request.removeattribute (Mapping.getattribute ());    return new Actionforward (Mapping.getinput ()); }

Hellomodel HM = new Hellomodel (); Hm.savetopersistentstore ((hellofrom) Form);

Request.removeattribute (Mapping.getattribute ()); Request.setattribute ("Helloform", form);

Return Mapping.findforward ("SayHello"); }}



This class is not required for struts, it's an increase in my coding

"Encodingfilter.java":

Package com.javer.test.struts;

Import Java.io.ioexception;import Javax.servlet.filter;import Javax.servlet.filterchain;import Javax.servlet.filterconfig;import Javax.servlet.servletexception;import Javax.servlet.servletrequest;import Javax.servlet.ServletResponse;

public class Encodingfilter implements filter{protected String encoding = NULL;

protected Filterconfig filterconfig = null;

Protected Boolean ignore = true;

public void Destroy () {this.encoding = null;  This.filterconfig = null; }

public void Dofilter (ServletRequest request, servletresponse response, Filterchain chain) throws Ioex Ception, Servletexception {if (Ignore | |    (request.getcharacterencoding () = null))    {request.setcharacterencoding (selectencoding (request));  Chain.dofilter (request, response); }

public void init (Filterconfig filterconfig) throws Servletexception {

This.filterconfig = Filterconfig;    this.encoding = Filterconfig.getinitparameter ("encoding");    String value = filterconfig.getinitparameter ("Ignore");    if (value = = null) {This.ignore = true;    else if (Value.equalsignorecase ("true") | | value.equalsignorecase ("yes")) {This.ignore = true;    else {This.ignore = false; }  }

Protected String selectencoding (ServletRequest request) {return (this.encoding); }

Public Filterconfig Getfilterconfig () {return filterconfig; }

public void Setfilterconfig (Filterconfig filterconfig) {this.filterconfig = Filterconfig; }}