根据华为云obs文件存储连接下载文件

逃离我推掉我的手 2024-02-21 11:51 32阅读 0赞

华为云obs文件存储返回路径：  
https://xxx/桶名/文件名?AccessKeyId=xxx&Policy=xxxSignature=xxx  
三个参数不多介绍，具体可参考官方文档

废话不多说，直接上代码
    ```java
    //判断是否包含https请求
    private static final String HTTPS = "https";
    //超时时间
    private static final int TIMEOUT = 180000;
    
    public static byte[] getUrlImg(String remoteFilePath) throws Exception {
    		//remoteFilePath返回的链接
            if (!remoteFilePath.contains(HTTPS)) {
                URL urlfile;
                HttpURLConnection httpUrl;
                InputStream inputStream;
                try (ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
                    urlfile = new URL(remoteFilePath);
                    httpUrl = (HttpURLConnection) urlfile.openConnection();
                    httpUrl.connect();
                    httpUrl.setConnectTimeout(TIMEOUT);
                    httpUrl.setReadTimeout(TIMEOUT);
                    inputStream = httpUrl.getInputStream();
                    int len = 2048;
                    byte[] b = new byte[len];
                    int num = inputStream.read(b);
                    while (num != -1) {
                        baos.write(b, 0, num);
                        num = inputStream.read(b);
                    }
                    baos.flush();
                    httpUrl.disconnect();
                    return baos.toByteArray();
                }
            }
        }

上述代码最后返回的是一个byte数组，可根据自己的需求修改返回值，例如想要返回base64：
    
    ```java
    Base64Utils.encodeToString(返回值)即可得到文件的base64