spring boot中上传图片至七牛云

一次项目中要求将图片上传到七牛云，所以记录了下来，有相关需求的朋友可以参考一下，

1. 首先导入七牛云的相关依赖，

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

 2.配置文件中配置自己申请的七牛相关的配置

# 七牛密钥，配上自己申请的七牛账号对应的密钥
qiniu.AccessKey=you qiniu accessKey
qiniu.SecretKey=you qiniu secretKey
# 七牛空间名
qiniu.Bucket=you qiniu bucket
# 外链访问路径
qiniu.cdn.prefix=you qiniu cdn.prefix

3.创建七牛上传的一个配置类

package com.example.qiniuyun.config;

import com.google.gson.Gson;
import com.qiniu.common.Zone;
import com.qiniu.storage.BucketManager;
import com.qiniu.storage.UploadManager;
import com.qiniu.util.Auth;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * 七牛配置类
 */
@Configuration
public class QiniuUploadFileConfig {

    /**
     * 华东机房,配置自己空间所在的区域
     */
    @Bean
    public com.qiniu.storage.Configuration qiniuConfig() {
        return new com.qiniu.storage.Configuration(Zone.zone0());
    }

    /**
     * 构建一个七牛上传工具实例
     */
    @Bean
    public UploadManager uploadManager() {
        return new UploadManager(qiniuConfig());
    }

    @Value("${qiniu.AccessKey}")
    private String accessKey;
    @Value("${qiniu.SecretKey}")
    private String secretKey;

    /**
     * 认证信息实例
     * @return
     */
    @Bean
    public Auth auth() {
        return Auth.create(accessKey, secretKey);
    }

    /**
     * 构建七牛空间管理实例
     */
    @Bean
    public BucketManager bucketManager() {
        return new BucketManager(auth(), qiniuConfig());
    }

    @Bean
    public Gson gson() {
        return new Gson();
    }
}

4.实现七牛云上传文件的相关逻辑

package com.example.qiniuyun.service;

import com.qiniu.common.QiniuException;
import com.qiniu.http.Response;

import java.io.File;
import java.io.InputStream;

/**
 * 七牛上传文件服务
 */
public interface IQiniuUploadFileService {

    Response uploadFile(File file) throws QiniuException;

    Response uploadFile(InputStream inputStream) throws QiniuException;

    Response delete(String key) throws QiniuException;
}

package com.example.qiniuyun.service.impl;

import com.example.qiniuyun.service.IQiniuUploadFileService;
import com.qiniu.common.QiniuException;
import com.qiniu.http.Response;
import com.qiniu.storage.BucketManager;
import com.qiniu.storage.UploadManager;
import com.qiniu.util.Auth;
import com.qiniu.util.StringMap;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.io.File;
import java.io.InputStream;

@Service
public class QiniuUploadFileServiceImpl implements IQiniuUploadFileService,InitializingBean {
    @Autowired
    private UploadManager uploadManager;

    @Autowired
    private BucketManager bucketManager;

    @Autowired
    private Auth auth;

    @Value("${qiniu.Bucket}")
    private String bucket;

    /**
     * 定义七牛云上传的相关策略
     */
    private StringMap putPolicy;


    /**
     * 以文件的形式上传
     * @param file
     * @return
     * @throws QiniuException
     */
    @Override
    public Response uploadFile(File file) throws QiniuException {
        Response response = this.uploadManager.put(file, null, getUploadToken());
        int retry = 0;
        while (response.needRetry() && retry < 3) {
            response = this.uploadManager.put(file, null, getUploadToken());
            retry++;
        }
        return response;
    }

    /**
     * 以流的形式上传
     * @param inputStream
     * @return
     * @throws QiniuException
     */
    @Override
    public Response uploadFile(InputStream inputStream) throws QiniuException {
        Response response = this.uploadManager.put(inputStream, null, getUploadToken(), null, null);
        int retry = 0;
        while (response.needRetry() && retry < 3) {
            response = this.uploadManager.put(inputStream, null, getUploadToken(), null, null);
            retry++;
        }
        return response;
    }

    /**
     * 删除七牛云上的相关文件
     * @param key
     * @return
     * @throws QiniuException
     */
    @Override
    public Response delete(String key) throws QiniuException {
        Response response = bucketManager.delete(this.bucket, key);
        int retry = 0;
        while (response.needRetry() && retry++ < 3) {
            response = bucketManager.delete(bucket, key);
        }
        return response;
    }


    @Override
    public void afterPropertiesSet() throws Exception {
        this.putPolicy = new StringMap();
        putPolicy.put("returnBody", "{\"key\":\"$(key)\",\"hash\":\"$(etag)\",\"bucket\":\"$(bucket)\",\"width\":$(imageInfo.width), \"height\":${imageInfo.height}}");
    }

    /**
     * 获取上传凭证
     * @return
     */
    private String getUploadToken() {
        return this.auth.uploadToken(bucket, null, 3600, putPolicy);
    }
}

这样我们就实现了七牛云的文件上传和删除，当然我们也可以指定上传的策略，比如自己指定上传到七牛云上的文件的名称

，

若要自己指定更多的上传策略，可以参考七牛云的官方文档https://developer.qiniu.com/kodo/manual/1206/put-policy