zha.aye
پنج شنبه 19 شهریور 1388, 15:29 عصر
با سلام من تازه شروع به برنامه نويسي كردم و در نوشتن اين برنامه جاوا دچار مشكل شدم كسي مي تونه به من بگه مشكل اين برنامه كجاست؟؟؟؟؟؟؟
import java.sql.Connection;
import java.sql.Statement;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
public class DisplayAuthers {
// JDBC driver name and database URL
static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
static final String DATABASE_URL = "jdbc:mysql://localhost/books";
// launch the application
public static void main( String args[] )
{
Connection connection = null; // manages connection
Statement statement = null; // query statement
// connect to database books and query database
try
{
Class.forName( JDBC_DRIVER ); // load database driver class
// establish connection to database
connection =
DriverManager.getConnection( DATABASE_URL, "root", "111" );
// create Statement for querying database
statement = connection.createStatement();
// query database
ResultSet resultSet = statement.executeQuery(
"SELECT Firstname, Lastname, autherId FROM authers" );
// process query results
ResultSetMetaData metaData = resultSet.getMetaData();
int numberOfColumns = metaData.getColumnCount();
System.out.println( "Authors Table of Books Database:" );
for ( int i = 1; i <= numberOfColumns; i++ )
System.out.printf( "%-8s\t", metaData.getColumnName( i ) );
System.out.println();
while ( resultSet.next() )
{
for ( int i = 1; i <= numberOfColumns; i++ )
System.out.printf( "%-8s\t", resultSet.getObject( i ) );
System.out.println();
} // end while
} // end try
catch ( SQLException sqlException )
{
sqlException.printStackTrace();
System.exit( 1 );
} // end catch
catch ( ClassNotFoundException classNotFound )
{
classNotFound.printStackTrace();
System.exit( 1 );
} // end catch
finally // ensure statement and connection are closed properly
{
try
{
statement.close();
connection.close();
} // end try
catch ( Exception exception )
{
exception.printStackTrace();
System.exit( 1 );
} // end catch
} // end finally
} // end main
}
import java.sql.Connection;
import java.sql.Statement;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
public class DisplayAuthers {
// JDBC driver name and database URL
static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
static final String DATABASE_URL = "jdbc:mysql://localhost/books";
// launch the application
public static void main( String args[] )
{
Connection connection = null; // manages connection
Statement statement = null; // query statement
// connect to database books and query database
try
{
Class.forName( JDBC_DRIVER ); // load database driver class
// establish connection to database
connection =
DriverManager.getConnection( DATABASE_URL, "root", "111" );
// create Statement for querying database
statement = connection.createStatement();
// query database
ResultSet resultSet = statement.executeQuery(
"SELECT Firstname, Lastname, autherId FROM authers" );
// process query results
ResultSetMetaData metaData = resultSet.getMetaData();
int numberOfColumns = metaData.getColumnCount();
System.out.println( "Authors Table of Books Database:" );
for ( int i = 1; i <= numberOfColumns; i++ )
System.out.printf( "%-8s\t", metaData.getColumnName( i ) );
System.out.println();
while ( resultSet.next() )
{
for ( int i = 1; i <= numberOfColumns; i++ )
System.out.printf( "%-8s\t", resultSet.getObject( i ) );
System.out.println();
} // end while
} // end try
catch ( SQLException sqlException )
{
sqlException.printStackTrace();
System.exit( 1 );
} // end catch
catch ( ClassNotFoundException classNotFound )
{
classNotFound.printStackTrace();
System.exit( 1 );
} // end catch
finally // ensure statement and connection are closed properly
{
try
{
statement.close();
connection.close();
} // end try
catch ( Exception exception )
{
exception.printStackTrace();
System.exit( 1 );
} // end catch
} // end finally
} // end main
}