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Basic Grammar Summary: <% @page >,<% @include >,<jsp:include>,<jsp:forward>
Plus database operations, you can develop a dynamic web.
Database script:
/*======================= using MLDN database =======================*/ Usemldn;/*======================= Deleting the user data table =======================*/DROP TABLE IF EXISTS User ;/*======================= Creating a User data table =======================*/CREATE TABLE User(useridVARCHAR( -)PRIMARY KEY, nameVARCHAR( -) not NULL, PasswordVARCHAR( +) not NULL) ;/*======================= inserting test data =======================*/INSERT into User(Userid,name,password)VALUES('Admin','Administrator','Admin') ;
Login.htm:
<HTML><HEAD><TITLE>WWW.MLDNJAVA.CN,MLDN High-end Java training </title>User Login</td> </tr> <tr> <td> login id:</td> <TD&G T;<input type= "text" name= "id" ></td> </tr> <tr> <td> Login Secret Yards:</td> <td><input type= "password" name= "password" ></td> </tr> <tr> <td colspan= "2" > <input type= "Submit" value= "Login" > <input type= "reset" value= "reset" > </td> </tr> </table> </form></center></body>LOGIN_CHECK.JSP:
<% @page contenttype= "text/html" pageencoding= "GBK"%><%@ pageImport= "Java.sql.*"%><HTML><HEAD><TITLE>WWW.MLDNJAVA.CN,MLDN high-end Java training </title>//define connection constants for several databases Public Static FinalString dbdriver = "Org.gjt.mm.mysql.Driver" ; Public Static FinalString Dburl = "JDBC:MYSQL://LOCALHOST:3306/MLDN" ; Public Static FinalString DBUSER = "root" ; Public Static FinalString Dbpass = "linda0213" ;%><%Connection Conn=NULL;//Database ConnectionPreparedStatement pstmt =NULL;//Database preprocessing OperationsResultSet rs =NULL;//query to process result sets BooleanFlag =false;//Save TagString name =NULL;//Save real name%><%Try{%><%Class.forName (Dbdriver); Conn=drivermanager.getconnection (Dburl,dbuser,dbpass); String SQL= "SELECT name from User WHERE userid=?" and password=? " ; Pstmt=conn.preparestatement (SQL); Pstmt.setstring (1,request.getparameter ("id")) ; Pstmt.setstring (2,request.getparameter ("Password")) ; RS= Pstmt.executequery ();//Enquiry if(Rs.next ()) {//If you have data, you can performFlag =true;//indicates successful landingName = rs.getstring (1) ; } %><%}Catch(Exception e) {e.printstacktrace ();}finally{ Try{rs.close (); Pstmt.close (); Conn.close (); } Catch(Exception e) {}}%><%if(flag) {//Landing Success%> <jsp:forward page= "login_success.jsp" > <jsp:param name= "uname" value= "<%=name%>"/&G T </jsp:forward><% } Else{//Login Failed%> <jsp:forward page= "login_failure.htm"/><% }%></center></body>LOGIN_SUCCESS.JSP:
<% @page contenttype= "text/html" pageencoding= "GBK"%>Login_failure.htm:
<HTML><HEAD><TITLE>WWW.MLDNJAVA.CN,MLDN High-end Java training </title>JSP basic Syntax--Example Walkthrough
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