Create a head.jsp file. Used to put some medicine fixed reference CSS, JS file here. As a public calling file.
<%@ page language= "java" contenttype= "text/html; Charset=utf-8 "pageencoding=" UTF-8 "%><! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd" >To create a login.jsp file:
<%@ include file= "head.jsp"%> <%@ page language= "java" contenttype= "text/html; Charset=utf-8 "pageencoding=" UTF-8 "%> <body style=" text-align:center;margin-bottom:100px; " > <div class= "navbar" > <div class= "Navbar-inner" > <a class= "brand" href= "#" style= "Margin-lef t:200px; " > Network disc </a> </div> </div> <div style= "text-align:left;margin:0px auto;margin-top:50px; width:1200px;height:500px; " > <div style= "float:left;width:800px; Height:100%;background: #009900 "></div> <div style=" float:left;width:400px; height:100%; Background: #00CC33 "> <fieldset> <form action=" Loginservlet "method=" post "class=" Form-horizontal "style= "margin-top:150px;margin-left:100px;" > User <input type= "text" id= "Inputemail" name= "username" > <br><br> Password <input type= "password" id= "Inputpassword" name= "password" > <BR><BR> <button type= "Submit" class= "BTN" > Login </button> <button type= "Submit" Clas s= "BTN" > Register </button> </form> </fieldset> </div> </div> </bo Dy>Start Tomcatserver test effect, want a lot of other gorgeous sister-in-love. We can do it by ourselves. (login is not possible here)Second, connect the database
(1) Copy the Mysql-connector-java-commercial-5.1.25.jar to the/web-inf/lib folder.
(2) Create user table and add data
Open the navicat for MySQL software. Connect to the Hadoop database and create a user table, then add 3 data to the table.
Iii. creating the model file for the operational database
(1) Conndb.java
Package Com.model;import Java.sql.connection;import Java.sql.drivermanager;public class Conndb {private Connection ct = Null;public Connection Getconn () {try {//Load drive Class.forName ("Com.mysql.jdbc.Driver");//Get Connected ct = Drivermanager.getconnection ("jdbc:mysql://localhost:3306/hadoop?user=root&password=");} catch (Exception e) {//TODO auto-generated catch Blocke.printstacktrace ();} return CT;}}(2) Userbean.java
Package Com.model;public class UserBean {String id; String username; String email; String Password;public string GetId () {return ID;} public void SetId (String id) {this.id = ID;} Public String GetUserName () {return username;} public void Setusername (String username) {this.username = username;} Public String Getemail () {return email;} public void Setemail (String email) {this.email = email;} Public String GetPassword () {return password;} public void SetPassword (String password) {this.password = password;}}
(3) Userbeancl.javapackage Com.model;import Java.sql.connection;import Java.sql.resultset;import Java.sql.sqlexception;import Java.sql.Statement; public class Userbeancl {private Statement sm = null;private Connection ct = null;private ResultSet rs = null;public void Close () {try {if (SM! = null) {sm.close (); sm = null;} if (ct! = null) {ct.close (); ct = null;} if (rs! = null) {Rs.close (); rs = null;}} catch (SQLException e) {//TODO auto-generated catch Blocke.printstacktrace ();}} Check whether the logged on user is legitimate public boolean checkUser (string user, String password) {Boolean b = false;try {//Get connected ct = new conndb (). Getconn ( );//Create STATEMENTSM = Ct.createstatement (); rs = Sm.executequery ("SELECT * from user where username=\" "+user+" \ ""); if ( Rs.next ()) {//description user exists string pwd = rs.getstring (3); if (Password.equals (pwd)) {//description password correct b = true;} Else{b = false;}} Else{b = false;}} catch (SQLException e) {e.printstacktrace ();} Finally{this.close ();} return b;}}
(3) Create Loginservlet file to handle logged-in usersPackage Com.controller;import Java.io.ioexception;import Javax.servlet.servletexception;import Javax.servlet.http.httpservlet;import Javax.servlet.http.httpservletrequest;import Javax.servlet.http.httpservletresponse;import Javax.servlet.http.httpsession;import Org.apache.hadoop.fs.filestatus;import Org.apache.hadoop.mapred.jobconf;import com.model.*;/** * Servlet Implementation class Listservlet */public class Loginservlet extends HttpServlet {/** * @see httpservlet#doget (HttpServle Trequest request, httpservletresponse response) */protected void doget (HttpServletRequest request, HttpServletResponse Response) throws Servletexception, IOException {this.dopost (request, response);} /** * @see Httpservlet#dopost (httpservletrequest request, httpservletresponse response) */protected void DoPost ( HttpServletRequest request, HttpServletResponse response) throws Servletexception, IOException {String username = Request.getparameter ("username"); String Password = request.getparameter ("password"); UsErbeancl UBC = new Userbeancl (); if (Ubc.checkuser (username, password)) {//user is legal. Jump to interface HttpSession session = Request.getsession (); Session.setattribute ("username", username); jobconf conf = Hdfsdao.config (); Hdfsdao HDFs = new Hdfsdao (conf); filestatus[] List = Hdfs.ls ("/" +username); Request.setattribute ("list", list); Request.getrequestdispatcher (" Index.jsp "). Forward (request, response);} else{//user is not legal. Recall the login interface and prompt for error message request.getrequestdispatcher ("login.jsp"). Forward (request, response); }}(4) Restart Tomcatserver test, this time will be able to achieve the user landing page jump (from login.jsp jump to index.jsp)
(7) Hadoop-based Simple network disk application implementation 3
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