Registering users with Java and saving them in the database

Last Update:2015-12-05 Source: Internet

Author: User

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Registration page

<%@ 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 "><HTML><Head><Metahttp-equiv= "Content-type"content= "text/html; charset=utf-8"><title>User Registration</title><Scripttype= "Text/javascript">//Verify the registration information on this page so that it cannot be emptyfunctionCheck () {varUID=document.getElementById ("userid"); if(Uid.value== "") {alert ("user code cannot be empty"); return false; }     if(Uform.usermingc.value== "") {alert ("user name cannot be empty"); return false; }    if(Uform.password.value== "") {alert ("The password cannot be empty"); return false; }    if(Uform.quer.value!=uform.password.value) {alert ("Inconsistent login password and confirmation password"); return false; }       return true; }</Script></Head><Body><formID= "Uform"Action= "Saveuser"onsubmit= "return check ()" >User code:<inputID= "userid"type= "text"name= "userid"width=30><BR><BR>User name:<inputID= "USERMINGC"type= "text"name= "username"width=30><BR><BR>Login Password:<inputID= "Password"type= "Password"name= "Password"width=30><BR><BR>Confirm Password:<inputID= "Quer"type= "Password"name= "Queren"width=30><BR><BR><inputtype= "Submit"value= "Submit"></form></Body></HTML>

Save interface

 PackageCom.hanqi;Importjava.io.IOException;Importjavax.servlet.ServletException;ImportJavax.servlet.annotation.WebServlet;ImportJavax.servlet.http.HttpServlet;Importjavax.servlet.http.HttpServletRequest;ImportJavax.servlet.http.HttpServletResponse;ImportJava.sql.*;/*** Servlet Implementation class Saveuser*/@WebServlet ("/saveuser") Public classSaveuserextendsHttpServlet {Private Static Final LongSerialversionuid = 1L; /**     * @seeHttpservlet#httpservlet ()*/     PublicSaveuser () {Super(); //TODO auto-generated Constructor stub    }    /**     * @seeHttpservlet#doget (httpservletrequest request, httpservletresponse response)*/    protected voidDoget (HttpServletRequest request, httpservletresponse response)throwsservletexception, IOException {request.setcharacterencoding ("UTF-8"); Response.setcontenttype ("Text/html; Charset=utf-8 "); String userid= Request.getparameter ("userid"); String username= Request.getparameter ("username"); String PW= Request.getparameter ("Password"); if(UserID = =NULL|| Userid.trim (). Length () = = 0) {Response.getwriter (). Append ("User ID cannot be empty"); }        Else if(Username = =NULL|| Username.trim (). Length () = = 0) {Response.getwriter (). Append ("User name cannot be empty"); }        Else        {            Try             {                //Registering Database DriversClass.forName ("Oracle.jdbc.driver.OracleDriver"); //Connection URLString url = "Jdbc:oracle:thin: @localhost: 1521:orcl" ; //Drive Manager Factory modeConnection conn = drivermanager.getconnection (URL, "test", "test"); if(Conn! =NULL)                {                    //manipulating DatabasesString sql = "INSERT into T_user (User_id,user_name,password) VALUES (?,?,?)" ; //classes that execute SQL statementsPreparedStatement pps =conn.preparestatement (SQL); Username=NewString (Username.getbytes ("iso-8859-1"), "UTF-8"); Pps.setstring (1, UserID); Pps.setstring (2, username); Pps.setstring (3, PW); introw = Pps.executeupdate ();//executes the SQL statement and returns the number of rows of data                                        if(Row > 0) {Response.getwriter (). Append ("Save" +row+ "bar Data succeeded"); }                    Else{response.getwriter (). Append ("Save data Failed"); }                                        //Freeing ResourcesPps.close ();                Conn.close (); }                Else{response.getwriter (). Append ("Failed to connect to database"); }            }            Catch(Exception e) {e.printstacktrace ();            Response.getwriter (). Append (E.getmessage ()); }} response.getwriter (). Append ("Served at:"). Append (Request.getcontextpath ()); }    /**     * @seeHttpservlet#dopost (httpservletrequest request, httpservletresponse response)*/    protected voidDoPost (HttpServletRequest request, httpservletresponse response)throwsservletexception, IOException {//TODO auto-generated Method Stubdoget (request, response); }}

Registering users with Java and saving them in the database

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