How Servlet connects to Oracle
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Copy the driver $ORACL_HOME/jdbc/lib/ojdbc6.jar of oracle to D:\ Tomcat5.5.17\ webapps\ my\ WEB-INF\ lib. (because the jar package is required at run time)
Package test
Import java.io.IOException
Import java.io.PrintWriter
Import javax.servlet.ServletException
Import javax.servlet.http.HttpServlet
Import javax.servlet.http.HttpServletRequest
Import javax.servlet.http.HttpServletResponse
Import java.sql.*
Public class Conndb extends HttpServlet {
Public void doGet (HttpServletRequest request, HttpServletResponse response)
Throws ServletException, IOException {
Connection conn = null
Statement stmt = null
ResultSet rs = null
Response.setContentType ("text/html")
Response.setCharacterEncoding ("gb2312")
PrintWriter out = response.getWriter ()
Out.println ("")
Out.println ("Content:")
Try {
Class.forName ("oracle.jdbc.driver.OracleDriver")
Conn = DriverManager.getConnection ("jdbc:oracle:thin:@192.168.1.250:1521:test", "scott", "tiger")
Stmt = conn.createStatement ()
Rs = stmt.executeQuery ("select * from emp")
While (rs.next ()) {
Out.println ("")
Out.println ("" + rs.getString ("ename") + "")
Out.println ("" + rs.getString ("MGR") + "")
Out.println ("")
}
Out.println ("")
} catch (ClassNotFoundException e) {
E.printStackTrace ()
} catch (SQLException e) {
E.printStackTrace ()
} finally {
Try {
If (rs! = null) {
Rs.close ()
Rs = null
}
If (stmt! = null) {
Stmt.close ()
Stmt= null
}
If (conn! = null) {
Conn.close ()
Conn = null
}
} catch (SQLException e) {
E.printStackTrace ()
}
}
}
}
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