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在 Java 中，可以使用 URL 和HttpURLConnection类来下载图片。以下是一个简单的示例代码：

import java.io.BufferedInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class ImageDownloader {public static void main(String[] args) {String imageUrl = "http://example.com/image.jpg";
        String destinationPath = "C:/path/to/save/image.jpg";
        
        try {URL url = new URL(imageUrl);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");
            
            InputStream inputStream = connection.getInputStream();
            BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream);
            
            FileOutputStream fileOutputStream = new FileOutputStream(destinationPath);
            
            byte[] buffer = new byte[1024];
            int bytesRead;
            while ((bytesRead = bufferedInputStream.read(buffer)) != -1) {fileOutputStream.write(buffer, 0, bytesRead);
            }
            
            fileOutputStream.close();
            bufferedInputStream.close();
            
            System.out.println("Image downloaded successfully.");
        } catch (IOException e) {e.printStackTrace();
        }
    }
}

只需将 imageUrl 替换为要下载的图片的 URL，将 destinationPath 替换为要保存图片的路径，运行代码即可下载图片。

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