package com.ruoyi.common.core.utils;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.UnsupportedEncodingException;
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import java.net.HttpURLConnection;
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import java.net.URL;
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import java.net.URLEncoder;
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public class UrlDownloader {
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/**
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* 将指定的URL内容下载为输入流
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*
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* @param urlString 要下载的URL
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* @return 包含URL内容的输入流
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* @throws IOException 如果发生I/O错误
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*/
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public static InputStream downloadAsStream(String urlString) throws IOException {
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// 找到最后一个斜杠的位置
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int lastSlashIndex = urlString.lastIndexOf("/");
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// 从斜杠后提取文件名
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String baseUrl = urlString.substring(0, lastSlashIndex);
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String fileName = urlString.substring(lastSlashIndex + 1);
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String encode = URLEncoder.encode(fileName, "UTF-8");
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urlString = baseUrl + "/" + encode;
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URL url = new URL(urlString);
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HttpURLConnection connection = (HttpURLConnection) url.openConnection();
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connection.setRequestMethod("GET");
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connection.connect();
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// 检查HTTP响应码
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int responseCode = connection.getResponseCode();
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if (responseCode != HttpURLConnection.HTTP_OK) {
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throw new IOException("HTTP response code: " + responseCode);
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}
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return connection.getInputStream();
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}
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public static void main(String[] args) throws UnsupportedEncodingException {
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String urlString = "http://192.168.110.188:9300/statics/2025/01/21/身份证人像面_20250121171827A014.png"; // 替换为你要下载的URL
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//将路径中的中文进行编码
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//String urlString = "http://192.168.110.188:9300/statics/2025/01/21/%E8%BA%AB%E4%BB%BD%E8%AF%81%E4%BA%BA%E5%83%8F%E9%9D%A2_20250121171827A014.png";
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// 找到最后一个斜杠的位置
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int lastSlashIndex = urlString.lastIndexOf("/");
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// 从斜杠后提取文件名
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String baseUrl = urlString.substring(0, lastSlashIndex);
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String fileName = urlString.substring(lastSlashIndex + 1);
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String encode = URLEncoder.encode(fileName, "UTF-8");
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urlString = baseUrl + "/" + encode;
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try (InputStream inputStream = downloadAsStream(urlString)) {
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// 这里你可以处理输入流,例如将其写入文件或进行其他操作
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byte[] buffer = new byte[1024];
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int bytesRead;
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while ((bytesRead = inputStream.read(buffer)) != -1) {
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// 处理读取的数据,例如写入文件或打印到控制台
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System.out.write(buffer, 0, bytesRead);
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}
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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