access|js|oracle|server|sqlserver| Access | data | Database access Oracle, SQL Server, DB2, Informix, Access database in JSP
Now have a lot of novice JSP users will often ask the database how to connect ah, how old mistakes ah? So I concentrated in this write an article for your reference, in fact, this database logic all put in the JSP may not be a good practice, but is conducive to beginners to learn, so I did so, when you learn a certain degree of time, you can consider using the pattern of MVC development. When practicing this code, you must put the JDBC driver into the server classpath, and then build a table test in the database, two fields such as TEST1,TEST2, you can use the following SQL to create TABLE test (test1 varchar) ( , Test2 varchar (20), and then write a Test record to the table, now start our JSP and database tour.
Testoracle.jsp is as follows:
<%@ page contenttype= "text/html;charset=gb2312"%>
<%@ page import= "java.sql.*"%>
<body>
<%class.forname ("Oracle.jdbc.driver.OracleDriver"). newinstance ();
String url= "Jdbc:oracle:thin: @localhost: 1521:ORCL";
ORCL for the SID of your database
String user= "Scott";
String password= "Tiger";
Connection conn= drivermanager.getconnection (Url,user,password);
Statement stmt=conn.createstatement (resultset.type_scroll_sensitive,resultset.concur_updatable);
String sql= "SELECT * from Test";
ResultSet rs=stmt.executequery (SQL);
while (Rs.next ()) {%>
Your first field content is: <%=rs.getstring (1)%>
The contents of your second field are: <%=rs.getstring (2)%>
<%}%>
<%out.print ("Successful database operation, congratulations");%>
<%rs.close ();
Stmt.close ();
Conn.close ();
%>
</body>
Testsqlserver.jsp is as follows:
<%@ page contenttype= "text/html;charset=gb2312"%>
<%@ page import= "java.sql.*"%>
<body>
<%class.forname ("Com.microsoft.jdbc.sqlserver.SQLServerDriver"). newinstance ();
String url= "Jdbc:microsoft:sqlserver://localhost:1433;databasename=pubs";
Pubs for your database of
String user= "SA";
String password= "";
Connection conn= drivermanager.getconnection (Url,user,password);
Statement stmt=conn.createstatement (resultset.type_scroll_sensitive,resultset.concur_updatable);
String sql= "SELECT * from Test";
ResultSet rs=stmt.executequery (SQL);
while (Rs.next ()) {%>
Your first field content is: <%=rs.getstring (1)%>
The contents of your second field are: <%=rs.getstring (2)%>
<%}%>
<%out.print ("Successful database operation, congratulations");%>
<%rs.close ();
Stmt.close ();
Conn.close ();
%>
</body>
Third, JSP connection DB2 database
Testdb2.jsp is as follows:
<%@ page contenttype= "text/html;charset=gb2312"%>
<%@ page import= "java.sql.*"%>
<body>
<%class.forname ("Com.ibm.db2.jdbc.app.DB2Driver"). newinstance ();
String url= "Jdbc:db2://localhost:5000/sample";
Sample for your database name
String user= "admin";
String password= "";
Connection conn= drivermanager.getconnection (Url,user,password);
Statement stmt=conn.createstatement (Resultset.type_scroll_sensitive,
resultset.concur_updatable);
String sql= "SELECT * from Test";
ResultSet rs=stmt.executequery (SQL);
while (Rs.next ()) {%>
Your first field content is: <%=rs.getstring (1)%>
The contents of your second field are: <%=rs.getstring (2)%>
<%}%>
<%out.print ("Successful database operation, congratulations");%>
<%rs.close ();
Stmt.close ();
Conn.close ();
%>
</body>
Four, JSP connection Informix Database
Testinformix.jsp is as follows:
<%@ page contenttype= "text/html;charset=gb2312"%>
<%@ page import= "java.sql.*"%>
<body>
<%class.forname ("Com.informix.jdbc.IfxDriver"). newinstance ();
String URL =
"Jdbc:informix-sqli://123.45.67.89:1533/testdb:informixserver=myserver;
User=testuser;password=testpassword ";
TestDB for your database name
Connection conn= drivermanager.getconnection (URL);
Statement stmt=conn.createstatement (resultset.type_scroll_sensitive,resultset.concur_updatable);
String sql= "SELECT * from Test";
ResultSet rs=stmt.executequery (SQL);
while (Rs.next ()) {%>
Your first field content is: <%=rs.getstring (1)%>
The contents of your second field are: <%=rs.getstring (2)%>
<%}%>
<%out.print ("Successful database operation, congratulations");%>
<%rs.close ();
Stmt.close ();
Conn.close ();
%>
</body>
Five, JSP connection Access database
<% @page import= "java.sql.*"
import = "Java.util.*"
import = "Java.io.*"
Import= "Java.text.*"
Contenttype= "text/html; charset=gb2312 "
Buffer= "20KB"
%><%! int all,i,m_count;
String Odbcquery;
Connection Odbcconn;
Statement odbcstmt;
ResultSet Odbcrs;
String username,title,content,work,email,url,time,date;
String datetime;
%>
<%
try{
Class.forName ("Sun.jdbc.odbc.JdbcOdbcDriver");
}catch (ClassNotFoundException e)
{Out.print ("driver does not exist");
}
try{
Odbcconn = Drivermanager.getconnection ("jdbc:odbc:db1");
odbcstmt = Odbcconn.createstatement ();
odbcquery= "SELECT * from book where datetime>2001-4-26 Order by datetime DESC";
Odbcrs=odbcstmt.executequery (Odbcquery);
int i=0;
while (i<130) Odbcrs.next ();
while (Odbcrs.next ())
{
*/////////////////////////Display the contents of the database for debugging programs is used//
int II;
try{
try{
for (Ii=1;; ii++)
Out.print ("<br> Cloumn" +ii+ "is:" +odbcrs.getstring (ii));
}catch (NullPointerException e) {
Out.print ("with empty pointers");
}
}catch (SQLException e) {
}
}
Odbcrs.close ();
Odbcstmt.close ();
Odbcconn.close ();
}catch (SQLException e)
{Out.print (e);
}
%>
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