checkusernameaction.java

spring struts hibernate 集成开发的web应用

package com.sc.struts.action.user.reg;

import org.apache.struts.action.*;

import javax.servlet.http.*;

import com.sc.struts.form.user.reg.CheckUsernameForm;
import com.sc.dao.UserDAO;


/**
 * @author cnsdl
 * @since jdk1.4
 *
 */
public class CheckUsernameAction extends Action {

	private UserDAO userDAO;

	/**
	 * @param 
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		
		String message = null;
		CheckUsernameForm usernameForm = (CheckUsernameForm) form;
		if (usernameForm == null){
			message = "nodata";
			System.out.println(usernameForm.getUsername());
		}else{
			if (userDAO.isUsedUsername(usernameForm.getUsername())) {
				
				message="no";
			} else {
				
				message = "yes";
			}
		}
	

		response.setContentType("text/xml");
		response.setHeader("Cache-Control", "no-cache");
		response.getWriter().write("<info><message>"+message+"</message></info>");
		return null;
	}
	
	public UserDAO getUserDAO() {
		return userDAO;
	}

	public void setUserDAO(UserDAO userDAO) {
		this.userDAO = userDAO;
	}

}