userlogoutaction.java

来自「使用J2EE Struts开发的房地产信息咨询系统」· Java 代码 · 共 44 行

/**
 * UserLogoutAction.java
 * 用户离开时的善后操作，处理与其相关的信息抹除操作
 * 主要针对session
 */

package building;

import java.util.*;
import javax.servlet.http.*;
import org.apache.struts.action.*;

public final class UserLogoutAction extends Action
{
	public ActionForward execute(
			ActionMapping mapping,
			ActionForm form,
			HttpServletRequest request,
			HttpServletResponse response)
	throws Exception
	{
		HttpSession session = request.getSession(true);
		
		if ( (String)session.getAttribute(Constants.LOGIN_USERNAME_KEY) != null )
		{
			session.removeAttribute(Constants.LOGIN_USERNAME_KEY);
		}//End of if
		
		if ( (Vector)session.getAttribute(Constants.USER_ALLINFO_KEY) != null )
		{
			session.removeAttribute(Constants.USER_ALLINFO_KEY);
		}//End of if
		
		if ( (Users)session.getAttribute(Constants.USER_INFO_KEY) != null )
		{
			session.removeAttribute(Constants.USER_INFO_KEY);
		}//End of if
		
		//跳转到主页面
		return(mapping.findForward("toIndex"));
	}//End of execute
	
}//End of class UserLogoutAction