jsp增删改查2.doc

Webroot文件夹下： Index.Jsp %@ page language=java import=java.util.* pageEncoding=utf-8% !DOCTYPE HTML PUBLIC -//W3C//DTD HTML 4.01 Transitional//EN html head title用户登录页面/title /head body font color=red%=request.getAttribute(msg)!=null?request.getAttribute(msg): %/fontbr form action=login_pro.jsp 请输入登陆信息br 姓名：input type=text name=username value=%=request.getAttribute(username_reg)!=null?request.getAttribute(username_reg): %/br 密码input type=password name=password/br input type=submit value=提交 /form a href=register.jsp 我要注册/a /body /html login_pro.jsp %@ page language=java contentType=text/html; charset=utf-8 pageEncoding=utf-8% %@page import=com.king.bean.UserInfo% %@page import=com.king.dao.UserDao% %@page import=com.king.dao.UserDaoImpl% % String username=request.getParameter(username); String password=request.getParameter(password); request.setAttribute(username_reg,new String(username.getBytes(iso-8859-1),utf-8)); if(username==null||username.trim().equals()){ request.setAttribute(msg,用户名不能为空！); request.getRequestDispatcher(index.jsp).forward(request,response); }else if(password==null||password.trim().equals()){ request.setAttribute(msg,密码不能为空！); request.getRequestDispatcher(index.jsp).forward(request,response); }else{ UserInfo u=new UserInfo(); u.setUsername(new String(username.getBytes(iso-8859-1),utf-8)); u.setPassword(new String(password.getBytes(iso-8859-1),utf-8)); UserDao dao=new UserDaoImpl(); boolean flag=dao.loginUser(u); if(flag==true){ request.setAttribute(username,u.getUsername()); request.getRequestDispatcher(userList_pro.jsp).forward(request,response); }else{ request.setAttribute(msg,登陆信息有误，请再次登陆或注册！); request.getRequestDispatcher(index.jsp ).forward(request,response); } } % %@ page language=java contentType=text/html; charset=utf-8 pageEncoding=utf-8% %@page import=com.king.bean.UserInfo% %@page import=com.king.dao.UserDao% %@page import=com.king.dao.UserDaoImpl% % String username=request.getP