java下载zip文件

你可以使用Java的URLConnection类来下载一个zip文件。以下是一个示例代码：

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

public class DownloadZipFile {
    public static void main(String[] args) throws IOException {
        String fileUrl = "http://example.com/example.zip";
        String saveDir = "/path/to/save/directory/";
        String fileName = "example.zip";

        URL url = new URL(fileUrl);
        URLConnection conn = url.openConnection();

        BufferedInputStream inputStream = new BufferedInputStream(conn.getInputStream());
        FileOutputStream outputStream = new FileOutputStream(saveDir + fileName);

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

        outputStream.close();
        inputStream.close();
        
        System.out.println("File downloaded successfully!");
    }
}

在这个例子中，你需要设置文件的下载链接(fileUrl)、要保存的目录(saveDir)和文件名(fileName)。程序将会从链接下载zip文件并保存在指定的目录下。