Java JDBC - 如何使用JDBC从一个表中选择数据并插入到不同db中的另一个表中

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;

public class Main {
  public static void main(String[] argv) throws Exception {
    Connection con = DriverManager.getConnection(
        "jdbc:postgresql://localhost:5432/old", "user", "pass");
    Connection con1 = DriverManager.getConnection(
        "jdbc:postgresql://localhost:5432/new", "user", "pass");

    String sql = "INSERT INTO users(" + "name," + "active," + "login,"
        + "password)" + "VALUES(?,?,?,?)";

    Statement statement = con.createStatement(
        ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);

    PreparedStatement pstmt = con1.prepareStatement(sql);

    ResultSet rs = statement.executeQuery("SELECT * FROM users");
    while (rs.next()) {
      String nm = rs.getString(2);
      Boolean ac = rs.getBoolean(3);
      String log = rs.getString(4);
      String pass = rs.getString(5);
      pstmt.setString(1, nm);
      pstmt.setBoolean(2, ac);
      pstmt.setString(3, log);
      pstmt.setString(4, pass);
      pstmt.executeUpdate();
    }
    con.close();
    con1.close();
  }
}