Slide 10.7: Calling a CGI script (Perl) Slide 10.9: Using Oracle9.2.0i on the server with an IP address 172.20.4.9 Home |
books
table if each of them contains the name from the Web, a command-line argument args[0]
.
If the name is empty, then list all titles.
The method trim( ) of the class String returns a copy of the string, with leading and trailing whitespace omitted.
~wenchen/public_html/cgi-bin/351/week10/ListTitles.java |
/********************************************************* This program shows how to list the book titles in the books table. To use this program, you need to create a table books by using the following command: SQL> create table books ( 2 title varchar(128) not null, 3 ISBN char(12) primary key, 4 authors varchar(128) not null, 5 price number(5,2) not null check( price >= 0.0 ), 6 quantity integer not null check( quantity >= 0 ) ); Table created. *********************************************************/ // You need to import the java.sql package to use JDBC. import java.sql.*; import java.io.*; class ListTitles { public static void main( String args[ ] ) throws SQLException { // Load the Oracle JDBC driver. DriverManager.registerDriver ( new oracle.jdbc.driver.OracleDriver( )); // Connect to the database. You can put a database // name after the @ sign in the connection URL. Connection conn = DriverManager.getConnection ( "jdbc:oracle:thin:@172.20.4.9:1521:aero", "userid", "password" ); try { Statement stmt = conn.createStatement ( ); String query = "select title from books where "; query += "authors like '%" + args[0].trim( ) + "%'"; System.out.print( "<em>" + query + "</em><br /><br /><br />" ); ResultSet rset = stmt.executeQuery( query ); // Iterate through the result and print the data. while ( rset.next( ) ) { System.out.print ( rset.getString( 1 ) ); System.out.println( "<br />"); } // Close the Statement and ResultSet. stmt.close( ); rset.close( ); } catch ( SQLException ex ) { System.out.println( ex ); } // Close the connection. conn.close( ); } } |