Java http下载文件
时间: 2023-08-13 14:02:56 浏览: 47
回答: 在Java中,可以使用HttpURLConnection或HttpClient来实现HTTP文件下载。下面是一个使用HttpURLConnection的示例代码:
```java
String fileUrl = "http://example.com/file.doc";
String savePath = "path/to/save/file.doc";
URL url = new URL(fileUrl);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
int responseCode = connection.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) {
InputStream inputStream = connection.getInputStream();
FileOutputStream outputStream = new FileOutputStream(savePath);
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("文件下载成功!");
} else {
System.out.println("文件下载失败,错误码:" + responseCode);
}
```
这段代码通过创建一个URL对象,并使用HttpURLConnection打开连接。然后,通过输入流读取服务器返回的数据,并将数据写入到本地文件中。最后,关闭输入流和输出流,完成文件下载。请注意,你需要替换`fileUrl`和`savePath`为你实际的文件URL和保存路径。
#### 引用[.reference_title]
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