当我们从网络中获取一个URL的图片我们要存储到本地或者是私有的云时，我们可以这样操作 把url中的图片文件下载到本地（或者上传到私有云中）
public String uploadUrlToOss(String url) {
try{
URL urls = new URL(url);
HttpURLConnection connection = (HttpURLConnection) urls.openConnection();
connection.addRequestProperty("User-Agent","Mozilla/5.0 (Windows NT 6.1; WOW64; rv:55.0) Gecko/20100101 Firefox/55.0");
connection.setConnectTimeout(10 * 1000);
connection.setReadTimeout(15 * 1000);
InputStream inputStream = connection.getInputStream();
//头像
File newFile = new File("headimgurl.png");
FileOutputStream os = new FileOutputStream(newFile);
byte[] buffer = new byte[81920];
int bytesRead = 0;
while((bytesRead = inputStream.read(buffer, 0, 81920)) != -1) {
os.write(buffer, 0, bytesRead);
}
os.flush();
os.close();
String urlss = AliyunOSSUtil.upload(newFile);
newFile.delete();
return urlss;
}catch (Exception e){
log.error("根据Url 获取图片的file 然后上传OSS 异常error ={}",e);
return null;
}
}
微信小程序二维码返回的二进制上传到OSS
public ResultDTO getQrCode(ReqQrCodeDTO reqQrCodeDTO) {
try {
//拼接URL
String access_token_url = WX_APPLET_GETAT+"?appid="+WX_APPLET_ID+"&secret="+WX_APPLET_KEY+"&grant_type=client_credential";
//使用Https请求微信API接口
String loginRet = HttpClientUtil.doGet(access_token_url);
JSONObject grantObj = new JSONObject(loginRet);
String errcode = grantObj.optString("errcode");
if (!StringUtils.isEmpty(errcode)){
log.error("login weixin error {}",loginRet);
}
String accessToken = grantObj.optString("access_token");
if (StringUtils.isEmpty(accessToken)){
log.error("bind weixin getOpenId error {}",loginRet);
}
/* 获取二维码的链接 */
String appletUrl = xxxx;
String param=appletUrl+"";
//String param="index";
Map<String, Object> params = new HashMap<>();
//params.put("access_token", "access_token");
params.put("path", param);
//params.put("page", appletUrl);
params.put("width", 250);
CloseableHttpClient httpClient = HttpClientBuilder.create().build();
HttpPost httpPost = new HttpPost(WX_APPLET_GETQR+"?access_token="+accessToken);
httpPost.addHeader(HTTP.CONTENT_TYPE, "application/json");
String body = JSON.toJSONString(params);
StringEntity entity;
entity = new StringEntity(body);
entity.setContentType("image/png");
httpPost.setEntity(entity);
HttpResponse response;
response = httpClient.execute(httpPost);
InputStream inputStream = response.getEntity().getContent();
//二维码
File newFile = new File("qrcode.png");
FileOutputStream os = new FileOutputStream(newFile);
byte[] buffer = new byte[81920];
int bytesRead = 0;
while((bytesRead = inputStream.read(buffer, 0, 81920)) != -1) {
os.write(buffer, 0, bytesRead);
}
os.flush();
os.close();
String urlss = AliyunOSSUtil.upload(newFile);
newFile.delete();
return ResultDTO.success(urlss);
}catch (Exception e){
log.error("获取二维码失败");
return ResultDTO.error();
}
}