newtopicaction.java

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package com.coffee.StudyBbs;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import org.apache.struts.action.DynaActionForm;

import javax.servlet.ServletContext;
import javax.sql.DataSource;
import java.sql.Connection;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;

public final class NewTopicAction extends Action{  
	public ActionForward execute(
		ActionMapping mapping,
		ActionForm form,
		HttpServletRequest request,  
		HttpServletResponse response) throws Exception {
	
        HttpSession session = request.getSession();
		ActionMessages errors = new ActionMessages();
        
        String username=(String)session.getAttribute(Constants.USERNAME_KEY);
        
        String PageForward;
        if (username==null) {
            errors.add(ActionMessages.GLOBAL_MESSAGE,
                           new ActionMessage("errors.userUnLogin"));
			if (!errors.isEmpty()) {
				saveErrors(request, errors);
			} 
 			PageForward="toWrong";  
        	
        } 
        else if (username.equals("guest")){
            errors.add(ActionMessages.GLOBAL_MESSAGE,
                           new ActionMessage("errors.guestCantSpeak"));
			if (!errors.isEmpty()) {
				saveErrors(request, errors);
			} 
 			PageForward="toWrong";  
        	
        }else{
 	   		PageForward="toNewTopic";				
 			saveToken(request);  //避免重复提交
        }
  	   	return (mapping.findForward(PageForward));				
	}

}