即时通讯试图在Java的内存中调整bufferdImage的大小，但要保持图像的长宽比，即时通讯有类似这样的内容，但这不好

int w = picture.getWidth();
int h = picture.getWidth();
int neww=w;
int newh=h;
int wfactor = w;
int hfactor = h;
if(w > DEFULT_PICTURE_WIDTH || h > DEFULT_PICTURE_HIGHT)
{
    while(neww > DEFULT_PICTURE_WIDTH)
    {
        neww = wfactor /2;
        newh = hfactor /2;
        wfactor = neww;
        hfactor = newh;
    }
}

picture = Utils.resizePicture(picture,neww,newh);