JDBC Proxy

When scraping dates from a website using Java, the SimpleDateFormat class is commonly used for parsing and formatting dates. Below is an example demonstrating how to scrape dates from a webpage and parse them using SimpleDateFormat. Additionally, you can use a library like Jsoup for HTML parsing.

Make sure to replace the URL, HTML parsing logic, and date format patterns with your specific requirements.

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class DateScrapingExample {

    public static void main(String[] args) {
        String url = "https://example.com"; // Replace with the URL of the webpage containing dates

        try {
            // Fetch HTML content using Jsoup
            Document document = Jsoup.connect(url).get();

            // Replace the following logic with the actual HTML parsing logic for dates
            Element dateElement = document.selectFirst(".date-selector"); // Replace with the appropriate selector
            String dateString = dateElement.text(); // Get the text content of the element

            // Parse the date using SimpleDateFormat
            SimpleDateFormat inputFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            Date parsedDate = inputFormat.parse(dateString);

            // Format the date for display
            SimpleDateFormat outputFormat = new SimpleDateFormat("EEE, MMM d, yyyy 'at' h:mm a");
            String formattedDate = outputFormat.format(parsedDate);

            // Print the formatted date
            System.out.println("Scraped Date: " + formattedDate);
        } catch (IOException | ParseException e) {
            e.printStackTrace();
        }
    }
}

In this example:

• We use the Jsoup library to fetch the HTML content from the specified URL.
• We assume there is an HTML element with a class name of "date-selector" containing the date text. Adjust the selector based on the structure of the webpage you are scraping.
• The SimpleDateFormat class is used to parse the scraped date string into a Date object using the specified input format.
• Another SimpleDateFormat is used to format the date into a more readable output format.

Note: Make sure to handle exceptions appropriately, and adjust the date format patterns according to the actual format used on the webpage.

If your Java UDP server does not accept more than one packet, there might be an issue with the way you are handling incoming packets or with the network configuration. To troubleshoot and resolve this issue, you can follow these steps:

1. Check your server code to ensure that it is correctly handling incoming packets. Make sure you are not accidentally discarding or overwriting packets.

2. Verify that there are no firewalls or network configurations blocking the UDP packets. UDP is a connectionless protocol, and packets may be dropped by firewalls or routers if they are not allowed.

3. Ensure that the client is sending packets correctly. Check if the client is using the correct IP address and port number for the server, and that it is not sending packets too quickly, causing them to be dropped or lost.

4. Increase the buffer size of the UDP socket in your server code. By default, the buffer size is often too small to handle multiple packets efficiently. You can increase the buffer size by using the setSoTimeout() method on the DatagramSocket object. For example:

DatagramSocket serverSocket = new DatagramSocket(port);
serverSocket.setSoTimeout(timeout); // Set a timeout value in milliseconds

5. Implement a multithreaded or asynchronous server to handle multiple incoming packets simultaneously. This will allow your server to accept and process multiple packets at the same time. Here's an example of a multithreaded UDP server in Java:

import java.net.*;
import java.io.*;

public class MultithreadedUDPServer {
    public static void main(String[] args) throws IOException {
        int port = 12345;
        DatagramSocket serverSocket = new DatagramSocket(port);
        while (true) {
            byte[] receiveBuffer = new byte[1024];
            DatagramPacket receivePacket = new DatagramPacket(receiveBuffer, receiveBuffer.length);
            serverSocket.receive(receivePacket);
            handlePacket(receivePacket, serverSocket);
        }
    }

    private static void handlePacket(DatagramPacket receivePacket, DatagramSocket serverSocket) throws IOException {
        byte[] sendBuffer = new byte[1024];
        InetAddress clientAddress = receivePacket.getAddress();
        int clientPort = receivePacket.getPort();
        int packetLength = receivePacket.getLength();
        System.arraycopy(receiveBuffer, 0, sendBuffer, 0, packetLength);
        DatagramPacket sendPacket = new DatagramPacket(sendBuffer, packetLength, clientAddress, clientPort);
        serverSocket.send(sendPacket);
    }
}

By following these steps, you should be able to resolve the issue with your Java UDP server not accepting more than one packet.

To see your proxy server and port, you'll need to check the settings of the application or software you're using that requires a proxy server. The steps to find the proxy server and port will vary depending on the application or software. Here are some general steps for common applications:

For Web Browsers:

1. Open your web browser (e.g., Chrome, Firefox, Edge).
2. Click on the menu button (usually three horizontal lines or three dots) and select "Settings" or "Options."
3. Look for a section related to "Network settings," "Proxy settings," or "Connections."
4. Find the proxy server address and port in the settings.

For Windows:

1. Press the Windows key + R to open the Run dialog.
2. Type "inetcpl" and press Enter to open the Internet Properties window.
3. Go to the "Connections" tab, and click on "LAN settings."
4. In the LAN settings, check the box next to "Use a proxy server for your LAN" if you have a proxy server configured. The proxy server address and port will be displayed.

For macOS:

1. Click the Apple menu and select "System Preferences."
2. Click "Network."
3. Select the network connection you want to check the proxy settings for (e.g., Wi-Fi, Ethernet).
4. Click the "Advanced" button.
5. Go to the "Proxies" tab.
6. Check the box next to "Use a proxy server" if you have a proxy server configured. The proxy server address and port will be displayed.

For Linux:

1. Open the Terminal.
2. Enter the following command to edit the network configuration file: sudo nano /etc/environment
3. Find the line that starts with "http_proxy" and check the value to find the proxy server address and port (e.g., "http_proxy=http://proxyserver:port").

In simple terms, it is a logically separated part of the main local or public network. It is through it that many users can use a proxy through a single server at the same time. Each connection is allocated to a separate subnet.

The term "public" should be understood to mean open proxy servers. That is, they can be used by all users without exception. They can be insecure and are often quite overloaded, so the connection speed or response time when using public proxies can be very slow.