| |
import java.sql.*;
import org.postgresql.geometric.PGpoint;
import org.postgresql.geometric.PGcircle;
public class GeometricTest {
public static void main(String args[]) throws Exception {
Class.forName("org.postgresql.Driver");
String url = "jdbc:postgresql://localhost:5432/test";
Connection conn = DriverManager.getConnection(url,"test","");
Statement stmt = conn.createStatement();
stmt.execute("CREATE TEMP TABLE geomtest(mycirc circle)");
stmt.close();
insertCircle(conn);
retrieveCircle(conn);
conn.close();
}
private static void insertCircle(Connection conn)
throws SQLException {
PGpoint center = new PGpoint(1, 2.5);
double radius = 4;
PGcircle circle = new PGcircle(center, radius);
PreparedStatement ps = conn.prepareStatement("INSERT INTO geomtest(mycirc) VALUES (?)");
ps.setObject(1, circle);
ps.executeUpdate();
ps.close();
}
private static void retrieveCircle(Connection conn) throws SQLException {
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("SELECT mycirc, area(mycirc) FROM geomtest");
rs.next();
PGcircle circle = (PGcircle)rs.getObject(1);
double area = rs.getDouble(2);
PGpoint center = circle.center;
double radius = circle.radius;
System.out.println("Center (X, Y) = (" + center.x + ", " + center.y + ")");
System.out.println("Radius = " + radius);
System.out.println("Area = " + area);
}
}
|
|