java远程下载文件到本地和传送给前端

矫情吗；* 2022-05-16 13:24 200阅读 0赞

java远程下载文件到本地

public class getFile {
        public static void downloadFile(String remoteFilePath, String localFilePath){
            URL urlfile = null;
            HttpURLConnection httpUrl = null;
            BufferedInputStream bis = null;
            BufferedOutputStream bos = null;
            File f = new File(localFilePath);
            try
            {
                urlfile = new URL(remoteFilePath);
                httpUrl = (HttpURLConnection)urlfile.openConnection();
                httpUrl.connect();
                bis = new BufferedInputStream(httpUrl.getInputStream());
                bos = new BufferedOutputStream(new FileOutputStream(f));
                int len = 2048;
                byte[] b = new byte[len];
                while ((len = bis.read(b)) != -1)
                {
                    bos.write(b, 0, len);
                }
                System.out.println("上传成功");
                bos.flush();
                bis.close();
                httpUrl.disconnect();
            }
            catch (Exception e)
            {
                e.printStackTrace();
            }
            finally
            {
                try
                {
                    bis.close();
                    bos.close();
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
        }
        
    //    public static void main(String[] args) {
    //        String remoteFilePath="http://172.18.49.196:9088/easkLogAnalyse/upload/IOS_AUDIT_LOG_20170207115053_18143481737.log";
    //        String localFilePath="F:/createFile/createFile/IOS_AUDIT_LOG_20170207115053_18143481737.log";
    //        downloadFile(remoteFilePath,localFilePath);
    //    }
    }

java远程下载文件传送给前端：

public static void getFile(String remoteFilePath, HttpServletResponse response){
            URL urlfile = null;
            HttpURLConnection httpUrl = null;
            BufferedInputStream bis = null;
            BufferedOutputStream bos = null;
            response.setHeader("Content-Disposition", "inline;filename="+ UUID.randomUUID().toString()+".pdf");
            //点击会提供对话框选择另存为：
            //response.setHeader( “Content-Disposition “, “attachment;filename= “+filename);
            //通过IE浏览器直接选择相关应用程序插件打开：
            //response.setHeader( “Content-Disposition “, “inline;filename= “+fliename)
            //下载前询问（是打开文件还是保存到计算机）
            //response.setHeader( “Content-Disposition “, “filename= “+filename);
            try
            {
                urlfile = new URL(remoteFilePath);
                httpUrl = (HttpURLConnection)urlfile.openConnection();
                httpUrl.connect();
                bis = new BufferedInputStream(httpUrl.getInputStream());
                bos = new BufferedOutputStream(response.getOutputStream());
                int len = 2048;
                byte[] b = new byte[len];
                while ((len = bis.read(b)) != -1)
                {
                    bos.write(b, 0, len);
                }
                bos.flush();
                bis.close();
                httpUrl.disconnect();
            }
            catch (Exception e)
            {
                e.printStackTrace();
            }
            finally
            {
                try
                {
                    bis.close();
                    bos.close();
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
        }