Simple in the form of code to commemorate, because there is no solution to the problem of SQL2008 drive, and there are a lot of things to learn, so there will be updates ~
The installed software is:sql2008,eclipse,tomcat,jdk, involving the environment configuration, and so on, the installation database feel the deepest, although there are tutorials online, but the actual operation, really feel that this is the real installation software.
Design key:
The key is to validate the page, which must: database connection operation, database record query operation
Submit Interface Code
<%@ page language= "java" pageencoding= "GB2312"%>
<! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "HTTP://WWW.W3.ORG/TR/HTML4/LOOSE.DTD" >
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 ">
<title> User Submission Page </title>
<body>
<form action = "ch07_7_yanzheng.jsp" method= "POST" >
User name: <input type= "text" name= "username" >
User password: <input type= "password" name= "pass" ><br></br>
<input type= "Submit" value= "Login" >
</form>>
</body>
：
Verify the interface code:
<%@ page language= "java" import= "java.sql.*" pageencoding= "GB2312"%>
<title> Login Verification Interface </title>
<% Connection Conn =null;
PreparedStatement pstmt =null;
ResultSet Rs=null;
try{String drivername = "Com.sql.jdbc.Driver";
String dbname= "User";
String url1= "jdbc:sql://localhost/" +dbname;
String url2= "? user=sa&password=lx13784429739";
String url3= "&unicode=true&characterencoding=gb2312";
String Url=url1+url2+url3; Class.forName (drivername);
Conn=drivermanager.getconnection (URL);
Request.setcharacterencoding ("GB2312");
String Name=request.getparameter ("username");
String pw=request.getparameter ("Pass");
String sql= "SELECT * from User_b where (uname=?andupassword=?) ";
pstmt =conn.preparestatement (SQL);
Pstmt.setstring (1,name);
Pstmt.setstring (2,PW);
Rs=pstmt.executequery ();
if (Rs.next ()) {%><%=name%>: Login Successful! <br><%
} else{%>
<%=name%>: Login failed! <br><%}
}catch (Exception e)
{%> An unexpected error occurred! <br><%=e.getmessage ()%> <%}
finally{if (rs!=null) {rs.close ();}
if (pstmt!=null) {pstmt.close ();}
if (conn!=null) {conn.close ();}
}%>
</body>
The database code is too simple to give.
During the writing verification interface, encountered some problems, so in csdn, blog Park, JSP Bar raised a bit of a problem, got enthusiastic netizens help, here to express thanks ~
http://tieba.baidu.com/p/3702849992
http://ask.csdn.net/questions/175550
Problems encountered:
That is, the definition of statement result connection should be placed on the outside of the try or in finally can not be called, in fact, before the question has been aware of the scope of the variable definition of the problem, is not able to solve, this is worth considering.
Problems to be solved:
Problems with database connections
Plan:
Thoroughly understand JSP+JDBC development mode, Learning Javabeen,servlet, the recent JSP, Javabeen, servlet, JDBC various combinations of development.
Preliminary JSP+JDBC SQL2008-based login verification program
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