java怎么下载项目中的文件

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要下载项目中的文件，可以使用 Java 中的 URLConnection 类来实现。以下是一个示例代码，演示如何下载一个文件：

import java.io.*;
import java.net.URL;
import java.net.URLConnection;

public class FileDownloader {public static void main(String[] args) {String fileUrl = "http://example.com/file.txt";
        String saveDir = "C:/downloads/";

        try {URL url = new URL(fileUrl);
            URLConnection conn = url.openConnection();
            InputStream inputStream = conn.getInputStream();

            File file = new File(saveDir + "file.txt");
            FileOutputStream outputStream = new FileOutputStream(file);

            byte[] buffer = new byte[4096];
            int bytesRead;
            while ((bytesRead = inputStream.read(buffer)) != -1) {outputStream.write(buffer, 0, bytesRead);
            }

            outputStream.close();
            inputStream.close();

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