@Override
    public MediaResponse uploadMedia(String toUser, String filePath) {
        File file = new File(filePath);
        if (!file.exists()) {
            throw new WeChatException("文件[" + filePath + "]不存在");
        }
        log.info("开始上传文件: {}", filePath);
        long   size      = file.length();
        String mimeType  = WeChatUtils.getMimeType(filePath);
        String mediatype = "doc";
        if (mediatype.contains("image")) {
            mediatype = "pic";
        }
        if (mediatype.contains("audio")) {
            mediatype = "audio";
        }
        if (mediatype.contains("video")) {
            mediatype = "video";
        }
        String url     = String.format("%s/webwxuploadmedia?f=json", bot.session().getFileUrl());
        String mediaId = System.currentTimeMillis() / 1000 + StringUtils.random(6);

        Map<String, Object> uploadMediaRequest = new HashMap<>(10);
        uploadMediaRequest.put("UploadType", 2);
        uploadMediaRequest.put("BaseRequest", bot.session().getBaseRequest());
        uploadMediaRequest.put("ClientMediaId", mediaId);
        uploadMediaRequest.put("TotalLen", size);
        uploadMediaRequest.put("StartPos", 0);
        uploadMediaRequest.put("DataLen", size);
        uploadMediaRequest.put("MediaType", 4);
        uploadMediaRequest.put("FromUserName", bot.session().getUserName());
        uploadMediaRequest.put("ToUserName", toUser);
        uploadMediaRequest.put("FileMd5", MD5Checksum.getMD5Checksum(file.getPath()));

        String dataTicket = this.client.cookie("webwx_data_ticket");
        if (StringUtils.isEmpty(dataTicket)) {
            throw new WeChatException("缺少了附件Cookie");
        }

        ApiResponse response = this.client.send(new StringRequest(url).post().multipart()
                .fileName(file.getName())
                .add("id", "WU_FILE_0")
                .add("name", filePath)
                .add("type", mimeType)
                .add("lastModifieDate", new SimpleDateFormat("yyyy MM dd HH:mm:ss").format(new Date()))
                .add("size", String.valueOf(size))
                .add("mediatype", mediatype)
                .add("uploadmediarequest", WeChatUtils.toJson(uploadMediaRequest))
                .add("webwx_data_ticket", dataTicket)
                .add("pass_ticket", bot.session().getPassTicket())
                .add("filename", RequestBody.create(MediaType.parse(mimeType), file)));

        MediaResponse mediaResponse = response.parse(MediaResponse.class);
        if (!mediaResponse.success()) {
            log.warn("上传附件失败: {}", mediaResponse.getMsg());
        }
        log.info("文件上传成功: {}", filePath);
        return mediaResponse;
    }
@ Override public MediaResponse uploadMedia ( String toUser , String filePath ) { File file = new File ( filePath ) ; if ( ! file . exists ( ) ) { throw new WeChatException ( "文件[" + filePath + "]不存在" ) ; } log . info ( "开始上传文件: {}" , filePath ) ; long size = file . length ( ) ; String mimeType = WeChatUtils . getMimeType ( filePath ) ; String mediatype = "doc" ; if ( mediatype . contains ( "image" ) ) { mediatype = "pic" ; } if ( mediatype . contains ( "audio" ) ) { mediatype = "audio" ; } if ( mediatype . contains ( "video" ) ) { mediatype = "video" ; } String url = String . format ( "%s/webwxuploadmedia?f=json" , bot . session ( ) . getFileUrl ( ) ) ; String mediaId = System . currentTimeMillis ( ) / 1000 + StringUtils . random ( 6 ) ; Map < String , Object > uploadMediaRequest = new HashMap < > ( 10 ) ; uploadMediaRequest . put ( "UploadType" , 2 ) ; uploadMediaRequest . put ( "BaseRequest" , bot . session ( ) . getBaseRequest ( ) ) ; uploadMediaRequest . put ( "ClientMediaId" , mediaId ) ; uploadMediaRequest . put ( "TotalLen" , size ) ; uploadMediaRequest . put ( "StartPos" , 0 ) ; uploadMediaRequest . put ( "DataLen" , size ) ; uploadMediaRequest . put ( "MediaType" , 4 ) ; uploadMediaRequest . put ( "FromUserName" , bot . session ( ) . getUserName ( ) ) ; uploadMediaRequest . put ( "ToUserName" , toUser ) ; uploadMediaRequest . put ( "FileMd5" , MD5Checksum . getMD5Checksum ( file . getPath ( ) ) ) ; String dataTicket = this . client . cookie ( "webwx_data_ticket" ) ; if ( StringUtils . isEmpty ( dataTicket ) ) { throw new WeChatException ( "缺少了附件Cookie" ) ; } ApiResponse response = this . client . send ( new StringRequest ( url ) . post ( ) . multipart ( ) . fileName ( file . getName ( ) ) . add ( "id" , "WU_FILE_0" ) . add ( "name" , filePath ) . add ( "type" , mimeType ) . add ( "lastModifieDate" , new SimpleDateFormat ( "yyyy MM dd HH:mm:ss" ) . format ( new Date ( ) ) ) . add ( "size" , String . valueOf ( size ) ) . add ( "mediatype" , mediatype ) . add ( "uploadmediarequest" , WeChatUtils . toJson ( uploadMediaRequest ) ) . add ( "webwx_data_ticket" , dataTicket ) . add ( "pass_ticket" , bot . session ( ) . getPassTicket ( ) ) . add ( "filename" , RequestBody . create ( MediaType . parse ( mimeType ) , file ) ) ) ; MediaResponse mediaResponse = response . parse ( MediaResponse . class ) ; if ( ! mediaResponse . success ( ) ) { log . warn ( "上传附件失败: {}" , mediaResponse . getMsg ( ) ) ; } log . info ( "文件上传成功: {}" , filePath ) ; return mediaResponse ; }
上传附件

@param toUser   发送给谁
@param filePath 文件路径
@return MediaResponse