JavaWeb應(yīng)用開發(fā)實驗報告-實驗七 JSP+Servlet+JavaBean+開發(fā)模式-1

第第頁實驗七JSP+Servlet+JavaBean開發(fā)模式-1一、實驗?zāi)康?、掌握J(rèn)SP+Servlet+JavaBean開發(fā)模式開發(fā)步驟；2、掌握J(rèn)SP+Servlet+JavaBean開發(fā)模式實現(xiàn)用戶登錄功能。二、實驗環(huán)境PC系列微機(jī)：CPU2G以上，內(nèi)存2G以上，硬盤可以空間：5G以上。操作系統(tǒng)：Windows10。三、實驗步驟1、編寫JavaBeanUser，該類中具有驗證用戶登錄的login(Useruser)方法。2、創(chuàng)建ServletLoginServlet并使用注解進(jìn)行配置。該Servlet接收用戶登錄提交的用戶名和密碼，調(diào)用User對象的login(Useruser)方法實現(xiàn)登錄驗證。3、創(chuàng)建login.jsp、index.jsp。用戶使用login.jsp提交登錄信息，LoginServlet中判斷登錄成功會跳轉(zhuǎn)到index.jsp，在index.jsp中顯示登錄成功的用戶名。4、調(diào)試程序是否正常運行四、實驗報告1、請寫出JavaBeanUser的完整代碼。importjava.sql.Connection;importjava.sql.PreparedStatement;importjava.sql.ResultSet;importjava.sql.SQLException;importutil.DBConnection;publicclassUser{ privateStringusername; privateStringpassword; publicStringgetUsername(){ returnusername; } publicvoidsetUsername(Stringusername){ this.username=username; } publicStringgetPassword(){ returnpassword; } publicvoidsetPassword(Stringpassword){ this.password=password; } publicstaticBooleanlogin(Useruser){ Stringusername=user.getUsername(); Stringpassword=user.getPassword(); Booleanflag=null; Stringsql="select*fromuserLoginwhereusername=?andpassword=?"; try{ Connectionconn=DBConnection.getConnection(); PreparedStatementps=conn.prepareStatement(sql); ps.setString(1,username); ps.setString(2,password); ResultSetrs=ps.executeQuery(); if(rs.next()){ flag=true; }else{ flag=false; } }catch(SQLExceptione){ e.printStackTrace(); } returnflag; }}請寫出LoginServlet的完整代碼。importjava.io.IOException;importjavax.servlet.ServletException;importjavax.servlet.annotation.WebServlet;importjavax.servlet.http.HttpServlet;importjavax.servlet.http.HttpServletRequest;importjavax.servlet.http.HttpServletResponse;importjavax.servlet.http.HttpSession;importbean.User;@WebServlet("/LoginServlet")publicclassLoginServletextendsHttpServlet{ privatestaticfinallongserialVersionUID=1L; protectedvoiddoGet(HttpServletRequestrequest,HttpServletResponseresponse)throwsServletException,IOException{ doPost(request,response); } protectedvoiddoPost(HttpServletRequestrequest,HttpServletResponseresponse)throwsServletException,IOException{ request.setCharacterEncoding("UTF-8"); HttpSessionsession=request.getSession(); Stringusername=request.getParameter("username"); Stringpassword=request.getParameter("password"); Useruser=newUser(); user.setUsername(username); user.setPassword(password); BooleanloginResult=User.login(user); if(loginResult){ session.setAttribute("user",user); response.sendRedirect("index.jsp"); }else{ response.sendRedirect("login.jsp"); } }}3、請寫出login.jsp、index.jsp的關(guān)鍵代碼。login.jsp的關(guān)鍵代碼：<center> <formaction="LoginServlet"method="post"style="margin-top:50px"> 用戶登錄<br> 用戶名：<inputtype="text"name="username"><br> 密碼：<inputtype="password"name="password"><br> <inputtype="submit"value="登錄"> <inpu