SpringBoot下利用wangEditor3将图片上传到七牛云

wangEditor3一般将图片上传到服务器很便捷，网上也有很多方法，但官方文档中给出的上传到七牛云的方法没领悟到什么意思，尝试了几次，没有成功，我就采取了一种折中的方法，即利用图片上传服务器的方法上传到七牛云。

首先在网页中配置wangEditor图片上传

var E = window.wangEditor;
    var editor = new E('#div1', '#div2');  // 两个参数也可以传入 elem 对象，class 选择器
    editor.customConfig.debug = true;
    editor.customConfig.uploadImgServer = '/post/upload';
    editor.customConfig.uploadFileName = 'multiple';  <-   与后台获取文件名相同
    editor.create();

创建结果返回类，wangEditor要求返回json信息

public class Result implements Serializable {
    private Integer errno;
    private String[] data;


    public Integer getErrno() {
        return errno;
    }

    public void setErrno(Integer errno) {
        this.errno = errno;
    }

    public String[] getData() {
        return data;
    }

    public void setData(String[] data) {
        this.data = data;
    }
}

//wangEditor图片上传返回数据
public class ResultUtil {
 //上传成功
    public static Result success(String[] object) {
        Result result = new Result();
        result.setErrno(0);
        result.setData(object);
        return result;
    }
   //上传失败
    public static Result success() {
        return null;
    }
}

七牛云上传工具类

@Service
public class Qiniu {
    Logger logger = LogManager.getLogger(LogManager.ROOT_LOGGER_NAME);
  //从springboot的application.properties文件获取你注册的七牛云有关信息  
  @Value("${qiniu.accessKey}")
    private String accessKey;
    @Value("${qiniu.secretKey}")
    private String secretKey;
    @Value("${qiniu.bucket}")
    private String bucket;
    @Value("${qiniu.path}")
    private String path;
    public String uploadToken(FileInputStream file, String key) {
        Configuration cfg = new Configuration(Zone.zone1());
        UploadManager uploadManager = new UploadManager(cfg);
        logger.info("path=" + path);
        try {
            Auth auth = Auth.create(accessKey, secretKey);
            String upToken = auth.uploadToken(bucket);
            try {
                Response response = uploadManager.put(file, key, upToken, null, null);

              //  DefaultPutRet putRet = JSON.parseObject(response.bodyString(), DefaultPutRet.class);
                DefaultPutRet putRet = new Gson().fromJson(response.bodyString(), DefaultPutRet.class);
                logger.info("key:" + putRet.key);
                String encodedFileName = URLEncoder.encode(putRet.key, "utf-8");
                //获取下载地址,前天可以通过img访问
                String finalUrl = String.format("%s/%s", path, encodedFileName);
                logger.info("访问地址:" + finalUrl);
                return finalUrl;
            } catch (QiniuException ex) {
                Response r = ex.response;
                System.err.println(r.toString());
                try {
                    System.err.println(r.bodyString());
                } catch (QiniuException ex2) {
                    //ignore
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "";
    }

}

在springmvc进行文件处理

@Controller
@RequestMapping("/post")
public class PostController {
     @Resource
     private Qiniu qiniu;
     //帖子上传图片到服务器 MultipartFile   multiple,与网页设置的名字相同
    @RequestMapping(value = "/upload", method = RequestMethod.POST)
    public @ResponseBody Result uploadImageHtml(MultipartFile multiple, HttpSession session, HttpServletRequest request) throws IOException {
        if (multiple != null) {
            FileInputStream inputStream = (FileInputStream) multiple.getInputStream();
            String fileName = multiple.getOriginalFilename();
           //下一句主要是创建文件名，我程序中还用到了springsecurity,你可以根据需要命名
            User user = (User) SecurityContextHolder.getContext().getAuthentication().getPrincipal();
            String fileNameExtension = fileName.substring(fileName.lastIndexOf("."), fileName.length());
            String realName = String.valueOf(System.currentTimeMillis()) + user.getUsername()  + fileNameExtension;
            String path = qiniu.uploadToken(inputStream, realName);
            String [] str = {path};
            return ResultUtil.success(str);
        }
        return ResultUtil.success();
    }
}