package demo02;import java.io.*; import java.net.URL; import java.util.ArrayList; import java.util.List;/*** 實現批量下載url圖片*/ public class DownImages {public static void main(String[] args) {//txt文件路徑String path = "txt文件路徑";try {//調用按行讀取txt文件方法List<String> list = getFileContext(path);for (String str : list) {//調用批量下載方法downloadPicture(str);System.out.println("圖片-->" + str + "<--下載完成");}} catch (Exception e) {e.printStackTrace();}}private static void downloadPicture(String urlList) {try {URL url = new URL(urlList);//創建數據輸入流DataInputStream dataInputStream = new DataInputStream(url.openStream());//存儲路徑String imageName = "圖片存儲路徑" + urlList.substring(urlList.lastIndexOf("/"));//創建文件輸出流FileOutputStream fileOutputStream = new FileOutputStream(new File(imageName));//創建字節數組輸出流ByteArrayOutputStream output = new ByteArrayOutputStream();byte[] buffer = new byte[1024];int length;while ((length = dataInputStream.read(buffer)) > 0) {output.write(buffer, 0, length);}byte[] context = output.toByteArray();fileOutputStream.write(output.toByteArray());dataInputStream.close();fileOutputStream.close();} catch (IOException e) {e.printStackTrace();}}/*** 將txt文件中每一行url，按行讀取，存入集合** @param path txt文件路徑* @return* @throws Exception*/public static List<String> getFileContext(String path) throws Exception {FileReader fileReader = new FileReader(path);BufferedReader bufferedReader = new BufferedReader(fileReader);ArrayList<String> list = new ArrayList<>();String str = null;//按行循環讀取txt文件while ((str = bufferedReader.readLine()) != null) {if (str.trim().length() > 2) {list.add(str);}}return list;} }

結果展示

圖片-->https://aaa.com/c81d81e4a5c0f76978a28b5cb25a4115.jpg<--下載完成

總結

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