1、参考网址：

• SpringBoot对接七牛：https://www.cnblogs.com/cbuc/articles/12326727.html
• wangEditor编辑器：https://www.kancloud.cn/wangfupeng/wangeditor2/123689

工程项目地址：https://gitee.com/huiyuan-bim/springboot-seeds

2、核心操作：

1）导入pom依赖

<!--七牛云-->
<dependency>
    <groupId>com.qiniu</groupId>
    <artifactId>qiniu-java-sdk</artifactId>
    <version>7.1.1</version>
</dependency>
<!--OKHTTP-->
<dependency>
   <groupId>com.squareup.okhttp3</groupId>
   <artifactId>okhttp</artifactId>
   <version>4.2.2</version>
</dependency>

2）七牛的工具类,更改对应的AK/SK

/**
 * 七牛云上传文件工具类
 */
public class QiniuCloudUtil {

    // 设置需要操作的账号的AK和SK                  （AK和SK均在七牛云中获得，以下会说明）
    private static final String ACCESS_KEY = "ACCESS_KEY";
    private static final String SECRET_KEY = "SECRET_KEY";

    // 要上传的空间                               （刚刚新建空间的名称）
    private static final String bucketname = "bucketname";

    // 密钥
    private static final Auth auth = Auth.create(ACCESS_KEY, SECRET_KEY);

    //新建空间时，七牛云分配出的域名 （自己可在万网购买域名解析后，绑定到加速域名）
    private static final String DOMAIN = "q5jhgxz4q.bkt.clouddn.com";

    public static String getUpToken() {
        return auth.uploadToken(bucketname, null, 3600, new StringMap().put("insertOnly", 1));
    }

    //base64方式上传
    public static String put64image(byte[] base64, String key) throws Exception {
        String file64 = Base64.encodeToString(base64, 0);
        Integer len = base64.length;

        //华北空间使用 upload-z1.qiniu.com，华南空间使用 upload-z2.qiniu.com，北美空间使用 upload-na0.qiniu.com
        String url = "http://upload-z2.qiniu.com/putb64/" + len + "/key/" + UrlSafeBase64.encodeToString(key);

        RequestBody rb = RequestBody.create(null, file64);
        Request request = new Request.Builder()
                .url(url)
                .addHeader("Content-Type", "application/octet-stream")
                .addHeader("Authorization", "UpToken " + getUpToken())
                .post(rb).build();
        OkHttpClient client = new OkHttpClient();
        okhttp3.Response response = client.newCall(request).execute();
        System.out.println(response);
        //返回图片地址   https://q5jhgxz4q.bkt.clouddn.com/812bbd78-62d3-44bc-836c-9ee27ba4866a
        //用此地址可在网页中访问到上传的图片
        return DOMAIN + key;        
    }

    /**
     * @param key 图片的文件名
     * @Explain 删除空间中的图片
     */
    public static void delete(String key) {
        BucketManager bucketManager = new BucketManager(auth);
        try {
            bucketManager.delete(bucketname, key);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

3）创建controller

@ResponseBody
@RequestMapping(value = "/uploadImg", method = RequestMethod.POST)
 public Object uploadImg(@RequestParam MultipartFile file) {
     if (file.isEmpty()) {
         return Result.error("文件不能为空");
     }
     try {
         byte[] bytes = file.getBytes();
         String imageName = UUID.randomUUID().toString();
         try {
             //使用base64方式上传到七牛云
             String url = QiniuCloudUtil.put64image(bytes, imageName);
             log.info("上传地址为----：" + url);
         } catch (Exception e) {
             e.printStackTrace();
         }
     } catch (IOException e) {
         return Result.error("上传图片异常");
     }
     return Result.success();
 }