JAVA之InputStream加载网络图片(填充到src)

Posted 2020-08-24 黄小易

@RequestMapping(value = "/queryCompanyImage", method = RequestMethod.GET)
@ResponseBody
public Result queryCompanyImage(HttpServletRequest request, HttpServletResponse response) throws IOException {
    Result result = new Result();

    try {
        Long fileId = Long.valueOf(request.getParameter("fileOssId"));

        InputStream fileOssRecordInputStream = null;

        fileOssRecordInputStream = ossHelpService.downloadPriFile(fileId);//这是一个阿里云OSS下载图片得到InputStream的方法

        BufferedInputStream reader = new BufferedInputStream(fileOssRecordInputStream);
        BufferedOutputStream writer = new BufferedOutputStream(response.getOutputStream());

        byte[] bytes = new byte[1024 * 1024];
        int length = reader.read(bytes);
        while ((length > 0)) {
            writer.write(bytes, 0, length);
            length = reader.read(bytes);
        }
        reader.close();
        writer.close();

        result.setSuccess(true);
    } catch (Exception ex) {
        log.error("获取产品图片异常", ex);
        return new Result(false, "获取产品图片异常");
    }
    return result;

}

<img src=‘${pageContext.request.contextPath }/rest/companyBorrow/queryCompanyImage?fileOssId=" + companyImage.fileOssId + "‘ style=‘width: 200px;height: 150px‘/>