java tutorial - Java DatabaseMetaData - java programming - learn java - java basics - java for beginners
- Metadata is nothing but the data about data.
- The DatabaseMetaData interface provides the ability to get information such as driver name, total number of tables, driver version and so on.
- We can get the object of DatabaseMetaData by calling getMetaData() method of Connection interface.
Syntax:
DatabaseMetaData dbmd=conn.getMetaData();click below button to copy the code. By - java tutorial - team
Methods of DatabaseMetaData interface
| Method | Description |
|---|---|
| public String getDriverName()throws SQLException | it returns the name of the JDBC driver. |
| public String getDriverVersion()throws SQLException | it returns the version number of the JDBC driver. |
| public String getUserName()throws SQLException | it returns the username of the database. |
| public String getDatabaseProductName()throws SQLException | it returns the product name of the database. |
Sample Code
JDBCTest.java
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import com.javawithease.util.JDBCUtil;
/**
* This class is used to show the use of DataBaseMetaData.
* @author javawithease
*/
public class JDBCExample {
public static void main(String args[]){
Connection conn = null;
try{
//get connection
conn = JDBCUtil.getConnection();
//get DatabaseMetaData
DatabaseMetaData dbmd = conn.getMetaData();
//Result set meta data
System.out.println("Driver Name: "
+ dbmd.getDriverName());
System.out.println("Driver Version: "
+ dbmd.getDriverVersion());
System.out.println("DB UserName: "
+ dbmd.getUserName());
System.out.println("DB Product Name: "
+ dbmd.getDatabaseProductName());
System.out.println("DB Product Version: "
+ dbmd.getDatabaseProductVersion());
//close connection
conn.close();
}catch(Exception e){
e.printStackTrace();
}
}
}click below button to copy the code. By - java tutorial - team
JDBCUtil.java
import java.sql.Connection;
import java.sql.DriverManager;
/**
* This is a utility class for JDBC connection.
* @author jawithease
*/
public class JDBCUtil {
//JDBC and database properties.
private static final String DB_DRIVER =
"oracle.jdbc.driver.OracleDriver";
private static final String DB_URL =
"jdbc:oracle:thin:@localhost:1521:XE";
private static final String DB_USERNAME = "system";
private static final String DB_PASSWORD = "oracle";
public static Connection getConnection(){
Connection conn = null;
try{
//Register the JDBC driver
Class.forName(DB_DRIVER);
//Open the connection
conn = DriverManager.
getConnection(DB_URL, DB_USERNAME, DB_PASSWORD);
if(conn != null){
System.out.println("Successfully connected.");
}else{
System.out.println("Failed to connect.");
}
}catch(Exception e){
e.printStackTrace();
}
return conn;
}
}click below button to copy the code. By - java tutorial - team
Output
Successfully connected.
Driver Name: Oracle JDBC driver
Driver Version: 10.2.0.1.0XE
DB UserName: SYSTEM
DB Product Name: Oracle
DB Product Version:
Oracle Database 10g Express Edition
Release 10.2.0.1.0 - Production