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srikala
java
1 Answer(s)      6 years and 5 months ago
Posted in : JDBC



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August 11, 2008 at 12:41 PM


Hi friend,



1. First import the java packages

import java.sql.*;

2. Loading a database driver

String driver = "com.mysql.jdbc.Driver";

3.Creating a jdbc Connection

String url = "jdbc:mysql://localhost:3306/";;
String username = "root";
String password = "root";
String dbName= "dbname";
Class.forName(driver);
Connection conn = DriverManager.getConnection(url+dbName, username, password);

4. Creating a jdbc Statement object

Statement st = conn.createStatement();

5. Executing a statement with the Statement object, and returning a jdbc resultSet

ResultSet rs = st.executeQuery("SELECT * FROM tablename");

6. ResultSet has method getMetaData() which returns the ResultSet MetaData object which provides
meta information of the result set.

ResultSetMetaData rsmd = rs.getMetaData();

7. getColumnCount() method on ResultSetMetaData object returns the number of columns
for the result set returned from the query.

int totalCol=rsmd.getColumnCount();
System.out.println("Number of Columns="+totalCol);


8. getTableName() method on ResultSetMetaData object returns the name of table.


System.out.println("Table Name = " + rsmd.getTableName(int column));


9. getColumnName() method on ResultSetMetaData object returns the name of column table.
and getString(int column) method returns the value of column table.

while(rs.next())
{
for(int i=1;i<=totalCol;i++)
{
System.out.println("Column Name" +rsmd.getColumnName(i));
System.out.println("Field Value " + rs.getString(i));
}
}

For read more information :

http://www.roseindia.net/jdbc/get-column-count-using-result-set.shtml

Thanks.




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