import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.Statement;
public class Main {
public static void main(String[] argv) throws Exception {
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/jdbctutorial",
"root", "root");
Statement st = con.createStatement();
ResultSet rs = st.executeQuery("DESCRIBE myTable");
ResultSetMetaData md = rs.getMetaData();
int col = md.getColumnCount();
for (int i = 1; i <= col; i++) {
String col_name = md.getColumnName(i);
System.out.println(col_name);
}
DatabaseMetaData dbm = con.getMetaData();
ResultSet rs1 = dbm.getColumns(null, "%", "myTable", "%");
while (rs1.next()) {
String col_name = rs1.getString("COLUMN_NAME");
String data_type = rs1.getString("TYPE_NAME");
int data_size = rs1.getInt("COLUMN_SIZE");
int nullable = rs1.getInt("NULLABLE");
System.out.println(col_name + " " + data_type + "(" + data_size + ")");
if (nullable == 1) {
System.out.println("YES");
} else {
System.out.println("NO");
}
}
}
}