Https图片链接下载问题

本文主要是介绍Https图片链接下载问题，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

1. 获取方法

入参是一个Url, 和一个随机的名称. 返回值是MultipartFile, 这里因为我这里需要调接口传到服务器, 这里也可以直接通过inputStream进行操作. 按需修改

 /*** 通过Url获取文件** @param url* @param fileName 随机产生一个文件名, 可以是uuid等* @return* @throws Exception*/public static MultipartFile doGetForHttpsUrl(String url, String fileName) throws Exception {CloseableHttpClient httpClient = getPassSSLCloseableHttpClient();InputStream inputStream = null;try {HttpGet httpGet = new HttpGet(url);// 第二个参数是user-agent 可以在网页的检查中看到httpGet.setHeader("User-Agent", getOneUserAgent());CloseableHttpResponse response = httpClient.execute(httpGet);if (response != null && response.getStatusLine().getStatusCode() == 200) {HttpEntity entity = response.getEntity();if (entity != null) {inputStream = entity.getContent();MultipartFile multipartFile = toMultipartFile(inputStream, fileName + ".png");response.close();return multipartFile;}}} finally {if (httpClient != null) {httpClient.close();}if (inputStream != null) {inputStream.close();}}return null;}/*** 将InputStream转换成MultipartFile* 这里是因为需求需要,所以转为了一下具体的根据实际情况返回需要的值* @param inputStream 输入流* @param fileName    文件名* @return*/public static MultipartFile toMultipartFile(InputStream inputStream, String fileName) throws IOException {File tempFile = File.createTempFile("multipart-file", ".tmp");FileUtils.copyInputStreamToFile(inputStream, tempFile);byte[] bytes = IOUtils.toByteArray(new FileInputStream(tempFile));return new MockMultipartFile(tempFile.getName(), fileName, "image/jpeg", bytes);}

2. 信任所有的整数解决证书问题

    /*** 信任所有的证书** @return* @throws NoSuchAlgorithmException* @throws KeyManagementException*/private static CloseableHttpClient getPassSSLCloseableHttpClient() throws NoSuchAlgorithmException, KeyManagementException {// 创建信任所有证书的 TrustManagerTrustManager[] trustAllCerts = new TrustManager[]{new X509TrustManager() {public X509Certificate[] getAcceptedIssuers() {return null;}public void checkClientTrusted(X509Certificate[] certs, String authType) {}public void checkServerTrusted(X509Certificate[] certs, String authType) {}}};// 获取 SSL 上下文SSLContext sc = SSLContext.getInstance("SSL");sc.init(null, trustAllCerts, new java.security.SecureRandom());// 将默认的 SSLSocketFactory 和 HostnameVerifier 替换为信任所有证书的版本return HttpClients.custom().setSSLContext(sc).setSSLHostnameVerifier(new NoopHostnameVerifier()).build();}