记录一个和很诡异的BUG_JAVA_编程开发_程序员俱乐部

class="java" name="code">
Map<String, Object> map = Maps.newHashMap();
        if (key.equals(SignUtils.getKey(url))) {
            try {
                String path = request.getSession().getServletContext().getRealPath(url);
                String[] fv = path.split("\\.");
                File newFile = new File(fv[0]+"_sign.png");
//              用下面三行代码 生成的图片有延迟，就是生成完成几秒后才能访问，具体原因不明白
//                String newUrl = fv[0]+"_sign.png";
//                String newFilePath = request.getSession().getServletContext().getRealPath(newUrl);//fv[0]+"_sign.png";
//                File newFile = new File(newFilePath);
                File oldFile = new File(request.getSession().getServletContext().getRealPath(url));
                InputStream in = new FileInputStream(oldFile);
                byte[] b = IOUtils.toByteArray(in);
                b = ImageUtils.transferAlpha(ImageUtils.ByteToBufferedImage(b), 150, x, y, width, height, rotate);
                Files.write(b,newFile);

                map.put("result", true);
                map.put("url", SignUtils.getUrl()+newFile.getName());
            } catch (Exception e) {
                e.printStackTrace();
                map.put("result", false);
                map.put("message", "操作失败："+e.getMessage());
            }
        } else {
            map.put("result", false);
            map.put("message", "非法操作");
        }
        response.flushBuffer();
        return map;