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How to get the list of all databases using JDBC?
You can get the list of databases in MySQL using the SHOW DATABASES query.
show databases;
Following JDBC program retrieves the list of databases by executing the show databases query.
Example
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class ShowDatabasesExample {
public static void main(String args[]) throws Exception {
//Registering the Driver
DriverManager.registerDriver(new com.mysql.jdbc.Driver());
//Getting the connection
String mysqlUrl = "jdbc:mysql://localhost/mydatabase";
Connection con = DriverManager.getConnection(mysqlUrl, "root", "password");
System.out.println("Connection established......");
//Creating a Statement object
Statement stmt = con.createStatement();
//Retrieving the data
ResultSet rs = stmt.executeQuery("Show Databases");
System.out.println("List of databases: ");
while(rs.next()) {
System.out.print(rs.getString(1));
System.out.println();
}
}
}Output
Connection established...... List of databases: information_schema base details errors logging mydatabase mydb mysql performance_schema sample_database sampledb students sys testdb world
Or, You can use the getCatalogs() method of the DatabaseMetaData interface.
Example
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.ResultSet;
public class ListOfAllDatabases {
public static void main(String args[]) throws Exception {
//Registering the Driver
DriverManager.registerDriver(new com.mysql.jdbc.Driver());
//Getting the connection
String mysqlUrl = "jdbc:mysql://localhost/mydatabase";
Connection con = DriverManager.getConnection(mysqlUrl, "root", "password");
System.out.println("Connection established......");
//Retrieving the meta data object
DatabaseMetaData metaData = con.getMetaData();
//Retrieving the list of database names
ResultSet tables = metaData.getCatalogs();
while (tables.next()) {
System.out.println(tables.getString("TABLE_CAT"));
}
}
}Output
Connection established...... List of databases: information_schema base details errors logging mydatabase mydb mysql performance_schema sample_database sampledb students sys testdb world
Updated on: 30-Jul-2019
2K+ Views
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