检查数据库是否存在

出处：http://stackoverflow.com/questions/12414596/how-to-check-if-a-particular-database-in-mysql-already-exists-using-java

// Connection connection = <your java.sql.Connection>ResultSet resultSet = connection.getMetaData().getCatalogs();//iterate each catalog in the ResultSetwhile (resultSet.next()) {  // Get the database name, which is at position 1  String databaseName = resultSet.getString(1);}resultSet.close();