使用Java实现远程文件下载到本地目录

前言

今天开发时遇见了一个下载附件的需求，他的附件是存在一个网盘里查询时只是给我返回了一个https的路径，需要通过这个路径把附件下载到本地的目录里

一、正文介绍

import java.io.*;import java.net.HttpURLConnection;import java.net.URL;import java.nio.channels.Channels;import java.nio.channels.ReadableByteChannel;public class downloadUtil {        public static void downloadFile1(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);            }            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 downloadFile2(String remoteFilePath, String localFilePath) {        URL website = null;        ReadableByteChannel rbc = null;        FileOutputStream fos = null;        try {            website = new URL(remoteFilePath);            rbc = Channels.newChannel(website.openStream());            fos = new FileOutputStream(localFilePath);//本地要存储的文件地址 例如：test.txt            fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);        } catch (Exception e) {            e.printStackTrace();        }finally{            if(fos!=null){                try {                    fos.close();                } catch (IOException e) {                    e.printStackTrace();                }            }            if(rbc!=null){                try {                    rbc.close();                } catch (IOException e) {                    e.printStackTrace();                }            }        }    }        public static void main(String[] args) {                String remoteFilePath1 = "https://tenfei01.cfp.cn/creative/vcg/800/new/VCG211157640278-VXD.jpg";        String remoteFilePath2 = "https://pic.3gbizhi.com/2019/1112/20191112013312648.jpg";                String localFilePath1 ="E:\\LeStoreDownload\\update\\广州塔.jpg";        String localFilePath2 ="E:\\LeStoreDownload\\update\\大桥.jpg";        downloadFile1(remoteFilePath1,localFilePath1);        downloadFile2(remoteFilePath2,localFilePath2);    }}

二、测试介绍

这里我使用的是网上搜索的图片路径做了一下测试仅供参考 如正文介绍

总结

使用Java实现远程文件下载到本地目录记录就到此结束了

来源地址：https://blog.csdn.net/qq_49417441/article/details/129733004