Java通过图片链接下载图片到本地

在Java中，你可以使用HttpURLConnection或者第三方库如Apache HttpClient或OkHttp来下载图片。以下是一个简单的示例，展示如何使用HttpURLConnection从图片链接下载图片： ```java import java.io.*; import java.net.URL; public class ImageDownloader { public static void downloadImage(String imageUrl, String destinationPath) throws IOException { URL url = new URL(imageUrl); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("GET"); connection.connect(); int responseCode = connection.getResponseCode(); if (responseCode == HttpURLConnection.HTTP_OK) { // 获取图片输入流 InputStream inputStream = connection.getInputStream(); FileOutputStream outputStream = new FileOutputStream(destinationPath); byte[] buffer = new byte[1024]; int bytesRead; while ((bytesRead = inputStream.read(buffer)) != -1) { outputStream.write(buffer, 0, bytesRead); } // 关闭流 inputStream.close(); outputStream.close(); System.out.println("Image downloaded successfully at " + destinationPath); } else { throw new RuntimeException("Failed to download image. Response code: " + responseCode); } } } ``` 在这个例子中，你需要提供一个图片链接`imageUrl`和本地保存的路径`destinationPath`。这个函数会连接到URL、检查响应码（确认请求成功），然后读取并保存文件。