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package com.xiaobu.util;import java.io.*;import java.net.HttpURLConnection;import java.net.URL;/** * @author xiaobu * @version JDK1.8.0_171 * @date on 2019/4/6 22:19 * @description V1.0 */public class DownloadFolder { public static void main(String[] args) { //http://www.cicicaseshop.com/images/upload/Image/cici2250/1.jpg String url = "http://www.cicicaseshop.com/images/upload/Image/cici2250/1.jpg"; String fileName = url.substring(url.lastIndexOf("/")); System.out.println("fileName---->" + fileName); String filePath = "d:"; File file = getFile(url, filePath + fileName, "GET"); System.out.println(file); } public static File getFile(String url, String filePath, String method) { //创建不同的文件夹目录 File file = new File(filePath); //判断文件夹是否存在 if (!file.exists()) { //如果文件夹不存在,则创建新的的文件夹 //file.mkdirs(); //如果文件不存在,则创建新的的文件 try { file.createNewFile(); } catch (IOException e) { e.printStackTrace(); } } FileOutputStream fileOut = null; HttpURLConnection conn = null; InputStream inputStream = null; try { // 建立链接 URL httpUrl = new URL(url); conn = (HttpURLConnection) httpUrl.openConnection(); //以Post方式提交表单,默认get方式 conn.setRequestMethod(method); conn.setDoInput(true); conn.setDoOutput(true); // post方式不能使用缓存 conn.setUseCaches(false); //连接指定的资源 conn.connect(); //获取网络输入流 inputStream = conn.getInputStream(); BufferedInputStream bis = new BufferedInputStream(inputStream); //判断文件的保存路径后面是否以/结尾 if (!filePath.endsWith("/")) { filePath += "/"; } System.out.println(filePath); //写入到文件(注意文件保存路径的后面一定要加上文件的名称) //fileOut = new FileOutputStream(filePath+"db.xml"); //写入到文件(已经加了文件名) fileOut = new FileOutputStream(filePath); BufferedOutputStream bos = new BufferedOutputStream(fileOut); byte[] buf = new byte[4096]; int length = bis.read(buf); //保存文件 while (length != -1) { bos.write(buf, 0, length); length = bis.read(buf); } bos.close(); bis.close(); conn.disconnect(); } catch (Exception e) { e.printStackTrace(); System.out.println("抛出异常!!"); } return file; }}
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