userinfoaction.java

该代码是Java数据库高级编程宝典中的重要的代码

package jdbcbook.shopping.action;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForward;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletException;
import java.io.IOException;

import jdbcbook.shopping.util.DispatchActionEx;
import jdbcbook.shopping.util.SessionUtil;
import jdbcbook.shopping.database.OperateDB;

import jdbcbook.shopping.form.Userinfo;
import jdbcbook.shopping.database.ManageDB;

public class UserinfoAction extends DispatchActionEx
{
	// 跳转到用户注册页面
	public ActionForward register(ActionMapping mapping,
								ActionForm form,
								HttpServletRequest request,
								HttpServletResponse response)
								throws IOException, ServletException
	{
		addMessage( request, "result", "userinfo_register_prompt" );
		return mapping.findForward( "register" );
	}

	// 用户登录
	public ActionForward login(ActionMapping mapping,
								ActionForm form,
								HttpServletRequest request,
								HttpServletResponse response)
								throws IOException, ServletException
	{
		// 登录操作
		ManageDB.login( (Userinfo)form, request );
		return mapping.findForward( "login" );
	}

	// 用户退出登录
	public ActionForward logout(ActionMapping mapping,
								ActionForm form,
								HttpServletRequest request,
								HttpServletResponse response)
								throws IOException, ServletException
	{
		// 清除Session中的用户信息
		SessionUtil.logout( request );

		return mapping.findForward( "login" );
	}

	// 保存用户信息
	public ActionForward store(ActionMapping mapping,
								ActionForm form,
								HttpServletRequest request,
								HttpServletResponse response)
								throws IOException, ServletException
	{
		Userinfo user = (Userinfo)form;

		// 判断是否有相同会员名的用户
		Userinfo u = ManageDB.getUserinfo( user.getLogname() );
		if( u!=null && u.getId()!=user.getId() )
		{
			addMessage( request, "result", "userinfo_logname_exist" );
			request.setAttribute( "userinfo", user );
			return mapping.findForward( "register" );
		}

		OperateDB.storeData( user );
		SessionUtil.logon( request, user );

		return mapping.findForward( "login" );
	}
	
}