Java实现七牛云文件图片上传下载

<!--七牛云上传图片服务-->
 <!-- https://mvnrepository.com/artifact/com.qiniu/qiniu-java-sdk -->
    <dependency>
      <groupId>com.qiniu</groupId>
      <artifactId>qiniu-java-sdk</artifactId>
      <version>7.2.7</version>
    </dependency>

import com.qiniu.common.QiniuException;
import com.qiniu.Http.Response;
import com.qiniu.storage.UploadManager;
import com.qiniu.util.Auth;
import com.qiniu.util.StringMap;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.ResponseBody;

import java.io.*;

public class QiniuUtil {

  //设置好账号的ACCESS_KEY和SECRET_KEY
  String ACCESS_KEY = ""; //这两个登录七牛 账号里面可以找到
  String SECRET_KEY = "";

  //要上传的空间
  String bucketname = ""; //对应要上传到七牛上 你的那个路径（自己建文件夹 注意设置私有）
  //上传到七牛后保存的文件名


  //密钥配置
  Auth auth = Auth.create(ACCESS_KEY, SECRET_KEY);
  //创建上传对象
  UploadManager uploadManager = new UploadManager();


  
  public String getUpToken(String fileName) {
    //return auth.uploadToken(bucketname);
    //<bucket>:<key>，表示只允许用户上传指定key的文件。在这种格式下文件默认允许“修改”，已存在同名资源则会被本次覆盖。
    //如果希望只能上传指定key的文件，并且不允许修改，那么可以将下面的 insertOnly 属性值设为 1。
    //第三个参数是token的过期时间
    return auth.uploadToken(bucketname, fileName, 3600, new StringMap().put("insertOnly", 0));
  }


  
  public void upload(String filePath, String fileName) {
    try {
      //调用put方法上传
      Response res = uploadManager.put(filePath, fileName, getUpToken(fileName));
      //打印返回的信息
      System.out.println(res.bodyString());
    } catch (QiniuException e) {
      Response r = e.response;
      // 请求失败时打印的异常的信息
      System.out.println(r.toString());
      try {
        //响应的文本信息
        System.out.println(r.bodyString());
      } catch (QiniuException e1) {
        //ignore
        e.printStackTrace();
      }
    }
  }

  
  public String getDownloadUrl(String targetUrl) {
    String downloadUrl = auth.privateDownloadUrl(targetUrl);
    return downloadUrl;
  }


  
  public void download(String targetUrl) {
    //获取downloadUrl
    String downloadUrl = getDownloadUrl(targetUrl);
    //本地保存路径
    String filePath = "E:\\chen\\";
    download(downloadUrl, filePath);
  }


  
  private static void download(String url, String filepath) {
    OkHttpClient client = new OkHttpClient();
    System.out.println(url);
    Request req = new Request.Builder().url(url).build();
    com.squareup.okhttp.Response resp = null;
    try {
      resp = client.newCall(req).execute();
      System.out.println(resp.isSuccessful());
      if (resp.isSuccessful()) {
        ResponseBody body = resp.body();
        InputStream is = body.byteStream();
        byte[] data = readInputStream(is);
        //判断文件夹是否存在，不存在则创建
        File file = new File(filepath);
        if (!file.exists() && !file.isDirectory()) {
          System.out.println("===文件夹不存在===创建====");
          file.mkdir();
        }
        File imgFile = new File(filepath + "888.jpg");
        FileOutputStream fops = new FileOutputStream(imgFile);
        fops.write(data);
        fops.close();
      }
    } catch (IOException e) {
      e.printStackTrace();
      System.out.println("Unexpected code " + resp);
    }
  }

  
  private static byte[] readInputStream(InputStream is) {
    ByteArrayOutputStream writer = new ByteArrayOutputStream();
    byte[] buff = new byte[1024 * 2];
    int len = 0;
    try {
      while ((len = is.read(buff)) != -1) {
        writer.write(buff, 0, len);
      }
      is.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
    return writer.toByteArray();
  }

  public static void main(String args[]) throws IOException {
    String fileName = "xiao.jpg";
    //上传文件的路径
    String FilePath = "C:\\Users\\ChenXiao\\Pictures\\Saved Pictures\\xiao.jpg";  //本地要上传文件路径
    // new QiniuUtil().upload(FilePath,fileName);

    //构造私有空间的需要生成的下载的链接；
    //格式： http://私有空间绑定的域名/空间下的文件名
    String targetUrl = "http://私有空间绑定的域名/下载文件名称.后缀"
    new QiniuUtil().download(targetUrl);
  }

}

    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastJSON</artifactId>
        <version>1.2.31</version>
    </dependency>

    <dependency>
        <groupId>com.qiniu</groupId>
        <artifactId>qiniu-java-sdk</artifactId>
        <version>7.2.7</version>
    </dependency>

<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
    <fORM action="/testUpload" method="post" enctype="multipart/form-data">
        <input type="file" name="file" />
        <button type="submit">上传</button>
    </form>
    
</body>
</html>

public class FileUtil {

    // 图片允许的后缀扩展名
    public static String[] IMAGE_FILE_EXTD = new String[] { "png", "bmp", "jpg", "jpeg","pdf" };

    public static boolean isFileAllowed(String fileName) {
        for (String ext : IMAGE_FILE_EXTD) {
            if (ext.equals(fileName)) {
                return true;
            }
        }
        return false;
    }
}

@Service
public class QiniuService {

    private static final Logger logger = LoggerFactory.getLogger(QiniuService.class);

    // 设置好账号的ACCESS_KEY和SECRET_KEY
    String ACCESS_KEY = "###################";
    String SECRET_KEY = "###################";
    // 要上传的空间
    String bucketname = "####";

    // 密钥配置
    Auth auth = Auth.create(ACCESS_KEY, SECRET_KEY);
    // 构造一个带指定Zone对象的配置类,不同的七云牛存储区域调用不同的zone
    Configuration cfg = new Configuration(Zone.zone0());
    // ...其他参数参考类注释
    UploadManager uploadManager = new UploadManager(cfg);

    // 测试域名，只有30天有效期
    private static String QINIU_IMAGE_DOMAIN = "http://############/";

    // 简单上传，使用默认策略，只需要设置上传的空间名就可以了
    public String getUpToken() {
        return auth.uploadToken(bucketname);
    }

    public String saveImage(MultipartFile file) throws IOException {
        try {
            int dotPos = file.getOriginalFilename().lastIndexOf(".");
            if (dotPos < 0) {
                return null;
            }
            String fileExt = file.getOriginalFilename().substring(dotPos + 1).toLowerCase();
            // 判断是否是合法的文件后缀
            if (!FileUtil.isFileAllowed(fileExt)) {
                return null;
            }

            String fileName = UUID.randomUUID().toString().replaceAll("-", "") + "." + fileExt;
            // 调用put方法上传
            Response res = uploadManager.put(file.getBytes(), fileName, getUpToken());
            // 打印返回的信息
            if (res.isOK() && res.isjson()) {
                // 返回这张存储照片的地址
                return QINIU_IMAGE_DOMAIN + JSONObject.parseObject(res.bodyString()).get("key");
            } else {
                logger.error("七牛异常:" + res.bodyString());
                return null;
            }
        } catch (QiniuException e) {
            // 请求失败时打印的异常的信息
            logger.error("七牛异常:" + e.getMessage());
            return null;
        }
    }
}

@Controller
public class TestController {
    
    @Autowired
    private QiniuService qiniuService;
    
    @RequestMapping(value = "/testUpload", method = RequestMethod.POST)
    @ResponseBody
    public String uploadImage(@RequestParam("file") MultipartFile file,HttpServletRequest request) {
        
        if(file.isEmpty()) {
            return "error";
        }
        
        try {
            String fileUrl=qiniuService.saveImage(file);
            return "success, imageUrl = " + fileUrl;
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "fail";
    }
}