java实现磁力链下载功能-CFANZ编程社区

Java实现磁力链下载功能

简介

磁力链是一种用于分享下载链接的方式，它通常用于下载种子文件或其他大型文件。在本文中，我们将通过Java编程语言来实现磁力链的下载功能。

实现步骤

1. 解析磁力链

首先，我们需要解析磁力链以获取其中的下载链接。我们可以使用Java中的正则表达式来提取磁力链中的关键信息。下面是一个示例代码：

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class MagnetLinkParser {
    public static void main(String[] args) {
        String magnetLink = "magnet:?xt=urn:btih:5A40C5B4B21AF943A6ED03D0D05F080EA85C49E7&dn=example.torrent";

        // 正则表达式
        String pattern = "magnet:\\?xt=urn:btih:([A-F0-9]+)&dn=([A-Za-z0-9.]+)";

        Pattern r = Pattern.compile(pattern);
        Matcher m = r.matcher(magnetLink);

        if (m.find()) {
            String hash = m.group(1);
            String fileName = m.group(2);

            System.out.println("Hash: " + hash);
            System.out.println("File Name: " + fileName);
        } else {
            System.out.println("Invalid magnet link");
        }
    }
}

2. 下载文件

下一步是使用解析出来的下载链接来下载文件。我们可以使用Java中的URLConnection类来实现文件的下载。下面是一个示例代码：

import java.io.BufferedInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;

public class FileDownloader {
    public static void main(String[] args) {
        String fileUrl = "
        String savePath = "/path/to/save/file.torrent";

        try {
            URL url = new URL(fileUrl);
            URLConnection connection = url.openConnection();

            BufferedInputStream in = new BufferedInputStream(connection.getInputStream());
            FileOutputStream out = new FileOutputStream(savePath);

            byte[] buffer = new byte[1024];
            int bytesRead;
            while ((bytesRead = in.read(buffer)) != -1) {
                out.write(buffer, 0, bytesRead);
            }

            out.close();
            in.close();

            System.out.println("File downloaded successfully");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

3. 完整代码示例

下面是一个完整的示例代码，演示了如何解析磁力链并下载文件：

import java.io.BufferedInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class MagnetLinkDownloader {
    public static void main(String[] args) {
        String magnetLink = "magnet:?xt=urn:btih:5A40C5B4B21AF943A6ED03D0D05F080EA85C49E7&dn=example.torrent";
        String savePath = "/path/to/save/file.torrent";

        // 解析磁力链
        String pattern = "magnet:\\?xt=urn:btih:([A-F0-9]+)&dn=([A-Za-z0-9.]+)";
        Pattern r = Pattern.compile(pattern);
        Matcher m = r.matcher(magnetLink);

        if (m.find()) {
            String hash = m.group(1);
            String fileName = m.group(2);

            // 下载文件
            String fileUrl = " + fileName;
            try {
                URL url = new URL(fileUrl);
                URLConnection connection = url.openConnection();

                BufferedInputStream in = new BufferedInputStream(connection.getInputStream());
                FileOutputStream out = new FileOutputStream(savePath);

                byte[] buffer = new byte[1024];
                int bytesRead;
                while ((bytesRead = in.read(buffer)) != -1) {
                    out.write(buffer, 0, bytesRead);
                }

                out.close();
                in.close();

                System.out.println("File downloaded successfully");
            } catch (IOException e) {
                e.printStackTrace();
            }
        } else {
            System.out.println("Invalid magnet link");
        }
    }
}