Spring Boot集成七牛云实现文件上传

1. 七牛云存储空间创建

注册认证七牛云账号后，在首页的管理控制台->选择空间管理->新建空间

创建成功后，七牛云会自动分配一个外链域名，也可以自己定义：

可以点击上图上传文件按钮，选中一个本地文件上传测试。

2. Spring Boot集成七牛云

1. 添加maven依赖：

        <!--七牛云-->
        <dependency>
            <groupId>com.qiniu</groupId>
            <artifactId>qiniu-java-sdk</artifactId>
            <version>[7.2.0, 7.2.99]</version>
        </dependency>

2. 七牛云配置类，密钥AK，SK配置信息在：个人中心->密钥管理 可查：
   

   @Component
   public class QiNiuUtil {
          
   	
   	//外链域名地址
       public static String qiniu_img_url_pre = "http://q8w1mid5i.bkt.clouddn.com/";
   	
   	//AccessKey
       public static String ACCESS_KEY = "CY39-W9tkMmp4p6AsYR9Bzcj5W-u459HRDhDRWkD";
   	
   	//SecretKey
       public static String SECRET_KEY = "PgeZCUjBhdryxp862kMHalFK3Up6ziqBaWJR2cLi";
   	
   	//存储空间名称
       public static String bucketname = "lijiageng";
       
       
       
       /**
        * 上传文件
        */
       public static String upload2Qiniu(FileInputStream file, String uploadFileName) {
          
           //构造一个带指定Zone对象的配置类,Zone.zone0()代表华东地区
           //zone2() 华南
           Configuration cfg = new Configuration(Zone.zone1());
           //...其他参数参考类注释
           UploadManager uploadManager = new UploadManager(cfg);
           //默认不指定key的情况下，以文件内容的hash值作为文件名
           String key = uploadFileName;
           Auth auth = Auth.create(ACCESS_KEY, SECRET_KEY);
           String upToken = auth.uploadToken(bucketname);
           try {
          
               Response response = uploadManager.put(file, key, upToken, null, null);
               //解析上传成功的结果
               String bodyString = response.bodyString();
               Map map = JSON.parseObject(bodyString, Map.class);
               String hash = (String) map.get("key");
               if (StringUtils.isNotEmpty(hash)) {
          
                   return qiniu_img_url_pre + uploadFileName;
               }
               System.out.println(response.bodyString());
               // 访问路径
               System.out.println(qiniu_img_url_pre + uploadFileName);
           } catch (QiniuException ex) {
          
               Response r = ex.response;
               System.err.println(r.toString());
               try {
          
                   System.err.println(r.bodyString());
                   return null;
               } catch (QiniuException ex2) {
          
                   //ignore
                   ex.printStackTrace();
                   return null;
               }
           }
           return null;
       }
   
       /**
        * 下载文件
        * @param url 文件在七牛云服务器上的地址
        * @return
        */
       public static byte[] downloadFromQNY(String url) {
          
            url ="http://q8w1mid5i.bkt.clouddn.com/893ab9c335cb472cb0a956840f75d46c.pdf";
           OkHttpClient client = new OkHttpClient();
           Request request = new Request.Builder().url(url).build();
           try {
          
               okhttp3.Response resp = client.newCall(request).execute();
               if (resp.isSuccessful()) {
          
                   ResponseBody body = resp.body();
                   InputStream inputStream = body.byteStream();
                   ByteArrayOutputStream writer = new ByteArrayOutputStream();
                   byte[] buff = new byte[1024 * 2];
                   int len = 0;
                   try {
          
                       while ((len = inputStream.read(buff)) != -1) {
          
                           writer.write(buff, 0, len);
                       }
                       inputStream.close();
                   } catch (Exception e) {
          
                       e.printStackTrace();
                   }
                   return writer.toByteArray();
               }
           } catch (Exception e) {
          
               e.printStackTrace();
           }
           return null;
       }
       
       
           public static void main(String[] args) throws FileNotFoundException {
          
   //        File file = new File("C:\\Users\\ljg\\Desktop\\BS\\xc-ui-pc-static-portal\\img\\page-1.jpg");
   //        FileInputStream fileInputStream = new FileInputStream(file);
   //        upload2Qiniu(fileInputStream,"123.jpg");
           downloadFromQNY(qiniu_img_url_pre + "893ab9c335cb472cb0a956840f75d46c.pdf");
       }
       
   }