Java通过网络图片之地址，下载到服务器，打包到本地

最新推荐文章于 2025-06-18 15:04:21 发布

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本文介绍了一种通过设置HTTP响应头来解决中文文件名乱码的方法，并提供了一个具体的示例，包括如何使用a标签调用以及处理中文乱码的具体实现。

a标签调用，处理了中文乱码问题

@RequestMapping("/downloadTableQrcode")

public void downloadTableQrcode(HttpServletRequest request, HttpServletResponse response,@RequestParam String name,@RequestParam String url) throws Exception{
try {
response.setContentType("application/zip");
String fileName = new String(name.getBytes(),"ISO8859-1"); //正确,不发生乱码
response.setHeader("Content-Disposition", "attachment; filename="+fileName+".jpg");
javax.servlet.ServletOutputStream out = response.getOutputStream();
DownloadPicFromURL.downloadPicture(url,request.getSession().getServletContext().getRealPath("/")+"downloadTableQrcode.jpg");
File file = null;
file = new File (request.getSession().getServletContext().getRealPath("/")+"downloadTableQrcode.jpg");
InputStream inputStream = new FileInputStream(file);
int b = 0;
byte[] buffer = new byte[1000000];
while (b != -1) {
b = inputStream.read(buffer);
if(b!=-1) out.write(buffer, 0, b);
}
inputStream.close();
out.close();
out.flush();
}catch(Exception e){e.printStackTrace();
}finally {
}

}

-------------------------工具类----------------------

//链接url下载图片
public static void downloadPicture(String urlList,String path) {
URL url = null;
try {
url = new URL(urlList);
DataInputStream dataInputStream = new DataInputStream(url.openStream());

FileOutputStream fileOutputStream = new FileOutputStream(new File(path));
ByteArrayOutputStream output = new ByteArrayOutputStream();

byte[] buffer = new byte[1024];
int length;

while ((length = dataInputStream.read(buffer)) > 0) {
output.write(buffer, 0, length);
}
fileOutputStream.write(output.toByteArray());
dataInputStream.close();
fileOutputStream.close();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}