Java通用方法 -- 图片处理工具类

public class ImageUtils
{
    private static final Logger log = LoggerFactory.getLogger(ImageUtils.class);

    public static byte[] getImage(String imagePath)
    {
        InputStream is = getFile(imagePath);
        try
        {
            return IOUtils.toByteArray(is);
        }
        catch (Exception e)
        {
            log.error("图片加载异常 {}", e);
            return null;
        }
        finally
        {
            IOUtils.closeQuietly(is);
        }
    }

    public static InputStream getFile(String imagePath)
    {
        try
        {
            byte[] result = readFile(imagePath);
            result = Arrays.copyOf(result, result.length);
            return new ByteArrayInputStream(result);
        }
        catch (Exception e)
        {
            log.error("获取图片异常 {}", e);
        }
        return null;
    }

    /**
     * 读取文件为字节数据
     * 
     * @param key 地址
     * @return 字节数据
     */
    public static byte[] readFile(String url)
    {
        InputStream in = null;
        ByteArrayOutputStream baos = null;
        try
        {
            if (url.startsWith("http"))
            {
                // 网络地址
                URL urlObj = new URL(url);
                URLConnection urlConnection = urlObj.openConnection();
                urlConnection.setConnectTimeout(30 * 1000);
                urlConnection.setReadTimeout(60 * 1000);
                urlConnection.setDoInput(true);
                in = urlConnection.getInputStream();
            }
            else
            {
                // 本机地址
                String localPath = “c:/img;
                String downloadPath = localPath + StringUtils.substringAfter(url, "/profile");
                in = new FileInputStream(downloadPath);
            }
            return IOUtils.toByteArray(in);
        }
        catch (Exception e)
        {
            log.error("获取文件路径异常 {}", e);
            return null;
        }
        finally
        {
            IOUtils.closeQuietly(in);
            IOUtils.closeQuietly(baos);
        }
    }
}