代码如下：

package com.xdx97.backstage;


import com.qiniu.common.Zone;
import com.qiniu.http.Response;
import com.qiniu.storage.BucketManager;
import com.qiniu.storage.Configuration;
import com.qiniu.util.Auth;

public class Test {

    public static void main(String[] args) {

        Auth auth = Auth.create("填写你的AK", "填写你的SK");
        Configuration config = new Configuration(Zone.autoZone());
        BucketManager bucketMgr = new BucketManager(auth, config);
        //指定需要删除的文件，和文件所在的存储空间
        String bucketName = "xxx";
        String  key = "xxx";
        try {
            Response delete = bucketMgr.delete(bucketName, key);
            delete.close();
        }catch (Exception e){
            e.printStackTrace();
        }
        System.out.println("结束了");
    }
}