java 对接七牛云

代码只是一个工具类，Controller层调用即可
pom文件添加如下代码

<dependency>
   <groupId>com.qiniu</groupId>
    <artifactId>qiniu-java-sdk</artifactId>
    <version>[7.2.0, 7.2.99]</version>
</dependency>
<dependency>
    <groupId>com.qiniu</groupId>
    <artifactId>happy-dns-java</artifactId>
    <version>0.1.6</version>
    <scope>test</scope>
</dependency>

java代码

import com.google.gson.Gson;
import com.qiniu.common.QiniuException;
import com.qiniu.http.Response;
import com.qiniu.storage.BucketManager;
import com.qiniu.storage.Configuration;
import com.qiniu.storage.Region;
import com.qiniu.storage.UploadManager;
import com.qiniu.storage.model.DefaultPutRet;
import com.qiniu.util.Auth;
import net.coobird.thumbnailator.Thumbnails;
import org.springframework.web.multipart.MultipartFile;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.Date;

/**
 * @author Administrator
 */
public class QiNiuYun {
    private static String accessKey = "七牛云accessKey";
    private static String secretKey = "七牛云secretKey";
    private static String bucket = "七牛云空间名";
    private static String website = "网址";
    //上传图片 字节码
    public static String byteUpload(MultipartFile multipartFile,String newname) {
        // 构造一个带指定Zone对象的配置类
        Configuration cfg = new Configuration();
        // ...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
        Auth auth = Auth.create(accessKey, secretKey);
        String upToken = auth.uploadToken(bucket);
        try {
            byte[] uploadBytes = multipartFile.getBytes();
            ByteArrayInputStream inputStream=null;
            ByteArrayOutputStream outputStream =null;
            //图片压缩
            while (uploadBytes.length > 0.3*1024*1024){
                inputStream = new ByteArrayInputStream(uploadBytes);
                outputStream = new ByteArrayOutputStream(uploadBytes.length);
                Thumbnails.of(inputStream)
                        .scale(0.9f)
                        .outputQuality(0.9f)
                        .toOutputStream(outputStream);
                uploadBytes = outputStream.toByteArray();
            }
            try {
                Response response = uploadManager.put(uploadBytes, newname,upToken);
                // 解析上传成功的结果
                DefaultPutRet putRet = new Gson().fromJson(response.bodyString(), DefaultPutRet.class);
                return website+putRet.key;
            } catch (QiniuException ex) {
                Response r = ex.response;
                System.err.println(r.toString());
                try {
                    System.err.println(r.bodyString());
                } catch (QiniuException ex2) {
                    // ignore
                }
            }
        } catch (Exception ex) {
            System.out.println(new Date()+""+ex);
            // ignore
        }
        return null;

    }
    //上传图片 本地路径
    public String urlUpload(String FilePath){
        Configuration cfg = new Configuration(Region.huanan());
        UploadManager uploadManager = new UploadManager(cfg);
        String key = null;
        Auth auth = Auth.create(accessKey, secretKey);
        String upToken = auth.uploadToken(bucket);
        try {
            Response response = uploadManager.put(FilePath, key, upToken);
            //解析上传成功的结果
            DefaultPutRet putRet = new Gson().fromJson(response.bodyString(), DefaultPutRet.class);
            System.out.println(putRet.key);
            System.out.println(putRet.hash);
            return website+putRet.key;
        } catch (QiniuException ex) {
            Response r = ex.response;
            System.err.println(r.toString());
            try {
                System.err.println(r.bodyString());
            } catch (QiniuException ex2) {
                //ignore
            }
        }
        return "";
    }
    //删除图片 七牛云文件名
    public static void delUpload(String key){
        //构造一个带指定 Region 对象的配置类
        Configuration cfg = new Configuration(Region.region0());
        Auth auth = Auth.create(accessKey, secretKey);
        BucketManager bucketManager = new BucketManager(auth, cfg);
        try {
            bucketManager.delete(bucket, key);
        } catch (QiniuException ex) {
            //如果遇到异常，说明删除失败
            System.err.println(ex.code());
            System.err.println(ex.response.toString());
        }
    }
}