1.配置
页面引入通过jssdk授权后,传入wx对象,首先配置需要的接口
wx.config({ /* debug: true, */ appId: appid, timestamp: timestamp, nonceStr: nonceStr, signature: signature, jsApiList: [ 'chooseImage',//拍照或从手机相册中选图接口 'previewImage',//预览图片接口 'uploadImage',//上传图片接口 'downloadImage'//下载图片接口 ] });
2.调起拍照/相册
将下面的方法放在需要点击事件的回调函数里面
wx.chooseImage({ count: 1, sizeType: ['compressed'], sourceType: ['album', 'camera'], success: function (res) { //var localIds = res.localIds; $('.driver-card img').prop('src',res.localIds[0]); uploadPhoto.uploadToWeixinServer(res.localIds[0],'car') } });
这时我们可以看到这样的效果,代表调起成功了!chooseImage方法的成功回调里,我将选中的照片赋值给需要显示的img的src(因为我这里只有一张照片,如果有多张用循环赋值即可),这样一来,就可以直接显示刚刚拍照/相册里选中的照片了
3.上传照片
在上面chooseImage的success回调里面,可以看到我调用了uploadToWeixinServer方法,参数为本地照片的Id
uploadToWeixinServer: 1
调用uploadImage接口后,将图片上传到了微信服务器,返回图片的ID,这个时候需要用ajax异步上传到自己的服务器里,调用微信提供的“获取临时素材”接口。当然也不一定是选择完照片就立即上传,还得根据实际业务需求出发,也有是静默上传(没有进度提示),也有是在最终提交表单时一起上传
js:
uploadToOwnerServer: function(serverId,type){ $.ajax({ data: {serverId:serverId,type:type}, type : POST, url : WX_ROOT + wechat/uploadPhoto, success : function(json) { if (json) { var data = JSON.parse(json.data); if ('car' == type) uploadPhoto.options.carImage = data.path + data.name else uploadPhoto.options.idCardImage = data.path + data.name } } }); },
Controller
@RequestMapping(value = /uploadPhoto, method = RequestMethod.POST) public @ResponseBody HttpResult uploadPhoto(@RequestParam String serverId,@RequestParam String type) throws Exception{ LOGGER.info(RestFul of uploadPhoto parameters serverId:{},type:{},serverId,type); try { /** 将图片保存到本地服务器 **/ String photoName = type + new Date().getTime() + UUID.randomUUID().toString(); //文件路径不存在则创建 File saveFile = new File(PIC_PATH + type); if (!saveFile.mkdir()) saveFile.mkdir(); wechatService.saveImageToDisk(serverId, photoName, PIC_PATH + type + /); LOGGER.info(Download the picture from weixin server pathL:{},PIC_PATH + type + /); JSONObject data = new JSONObject(); data.put(name, type + / + photoName+.jpg); data.put(path, PIC_SERVER + /); HttpResult rs = new HttpResult(); rs.setCode(200); rs.setData(data.toJSONString()); LOGGER.info(Download the picture from weixin server is successful!serverId:{},photoName:{},serverId,photoName); LOGGER.info(HttpResult data:{},rs.getData()); return rs; } catch (Exception e) { LOGGER.error(Download the picture from weixin server is error,serverId); return null; }
这里我使用了一个UUID生成主键规则,通过类型+时间戳+唯一字符串定义图片名称。如果上传成功,同时又将自己服务器的图片地址返回给前端。
getInputStream
调用微信提供的获取临时素材接口下载还在微信服务器上的图片,参数为前端提交上来的媒体文件ID,最终将文件转化为输入流对象
/** * 根据文件id下载文件 * @param accessToken * @param mediaId * @return 文件流对象 */ public InputStream getInputStream(String accessToken, String mediaId) { InputStream is = null; String url = http://www.jb51.cc/+ accessToken + &media_id= + mediaId; try { URL urlGet = new URL(url); HttpURLConnection http = (HttpURLConnection) urlGet.openConnection(); http.setRequestMethod(GET); // 必须是get方式请求 http.setRequestProperty(Content-Type,application/x-www-form-urlencoded); http.setDoOutput(true); http.setDoInput(true); System.setProperty(sun.net.client.defaultConnectTimeout, 30000);// 连接超时30秒 System.setProperty(sun.net.client.defaultReadTimeout, 30000); // 读取超时30秒 http.connect(); // 获取文件转化为byte流 is = http.getInputStream(); } catch (Exception e) { LOGGER.error(Failed to convert inputStream from weixin server,accessToken:{},mediaId:{},accessToken,mediaId); } return is; }
service
通过循环解析流对象,将文件写入自己的服务器
public void saveImageToDisk(String mediaId, String picName, String picPath) throws Exception { String accessToken = getBaseAccessToken(); InputStream inputStream = getInputStream(accessToken, mediaId); // 循环取出流中的数据 byte[] data = new byte[1024]; int len = 0; FileOutputStream fileOutputStream = null; try { fileOutputStream = new FileOutputStream(picPath+picName+.jpg); while ((len = inputStream.read(data)) != -1) { fileOutputStream.write(data, 0, len); } LOGGER.info(Write the fileInputStream is successful); } catch (IOException e) { LOGGER.error(Write the fileInputStream is error); } finally { if (inputStream != null) { try { inputStream.close(); } catch (IOException e) { LOGGER.error(Close the fileInputStream is error); } } if (fileOutputStream != null) { try { fileOutputStream.close(); } catch (IOException e) { LOGGER.error(Close the fileOutputStream is error); } } } }
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