对请求URL签名，设置接口权限：

        WxApi2 wxApi2 = wxConfigService.getWxApi2(wxid);
        if (Lang.isEmpty(Globals.memoryJsapiTicketStore.get(wxid))) {
            Globals.memoryJsapiTicketStore.put(wxid, new MemoryJsapiTicketStore());
        }        
        MemoryJsapiTicketStore memoryJsapiTicketStore = Globals.memoryJsapiTicketStore.get(wxid);
        wxApi2.setJsapiTicketStore(memoryJsapiTicketStore);
        String url = "http://" + Globals.AppDomain + Globals.AppBase + "/public/wx/bzsx/wdsq/sc/" + id;
        NutMap jsConfig = wxApi2.genJsSDKConfig(url, "chooseImage", "previewImage", "uploadImage", "downloadImage");
        req.setAttribute("jsConfig", Json.toJson(jsConfig));

网页：

<script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
<script type="text/javascript">
$("#div01").bind("click",function () {
            var d=$(this);
            wx.chooseImage({
                count: 9, // 最大9 默认值
                sizeType: ['compressed'], //只上传压缩图
                sourceType: ['album', 'camera'], //从相册或者拍照
                success: function (res) {
                    var localIds = res.localIds;//本地资源URL
                    var l=d.find(".leftdiv");
                    var str="";
                    $("#pic01").val("");
                    $.each(localIds,function (i,img) {//显示图片
                        str+='<img src="'+img+'" style="vertical-align: middle;width:35px;height: 35px;">';
                    });
                    l.html(str);
                    var j = 0, length = localIds.length;
                    var upload = function() {
                        wx.uploadImage({
                            localId: localIds[j],
                            isShowProgressTips: 1,//显示上传进度
                            success: function (res) {
                                var serverId = res.serverId;//media_id 用于下载
                                $("#pic01").val($("#pic01").val()+","+serverId);
                                j++;
                                if (j < length) {
                                    upload();//一个图片上传完了才能上传第二个
                                }
                            }
                        });
                    };
                    upload();
                }
            });
        });
    wx.config(${jsConfig!});
    wx.error(function(res){
       if(res.errMsg){
           alert(res.errMsg);
       }

    });
    wx.ready(function(){

    });
</script>

图片处理代码：

                        NutResource nutResource = wxApi2.media_get(serverId);//拉取微信图片到本地
                        String p = Globals.AppRoot;
                        String f = Globals.AppUploadPath + "/wx/" + DateUtil.format(new Date(), "yyyyMMdd") + "/" + R.UU32();
                        Files.write(new File(p + f + ".jpg"), nutResource.getInputStream());//写文件
                        Images.zoomScale(p + f + ".jpg", p + f + "_s.jpg", 50, 50, Color.black);//生成缩略图,设置背景色