//调用
@RequestMapping(value = "/pic/eid-{eventid:.*}", method = RequestMethod.GET)
public void getpicByeventid(HttpServletRequest request, HttpServletResponse response,@PathVariable("eventid") int eventid,
@RequestParam(value = "w", defaultValue = "0") int w,
@RequestParam(value = "h", defaultValue = "0") int h) throws IOException {
response.setHeader("Cache-Control", "max-age=" + (7 * 24 * 60 * 60));
response.setDateHeader("Last-Modified", new Date().getTime());
String mediaid = mediaDao.getMiediaideWeventid(eventid);
try {
if (mediaid.length() < 2) {
response.sendError(404, "exp");
return;
}
String imgurl = rootpath + mediaid.substring(0, 2) + "/" + mediaid.substring(2);
if (w != 0 || h != 0) {
this.diplayImageBySize(request, response, imgurl, mediaid, w, h);
} else {
this.diplayImage(request, response, imgurl, mediaid);
}
} catch (Exception ex) {
response.sendError(500, "exp");
return;
}
}
//设置宽度高度
public void diplayImageBySize(HttpServletRequest request, HttpServletResponse response, String imgurl, String id, int w, int h) throws IOException {
response.setHeader("Cache-Control", "max-age=" + (7 * 24 * 60 * 60));
response.setDateHeader("Last-Modified", new Date().getTime());
if (request.getHeader("If-Modified-Since") != null) {
response.setStatus(304);
return;
}
BufferedImage buffImg = dpservice.diplayImg(w + "," + h, imgurl);
Iterator iter = ImageIO.getImageWritersByFormatName("jpeg");
ImageWriter writer = (ImageWriter) iter.next();
ImageWriteParam iwp = writer.getDefaultWriteParam();
iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
iwp.setCompressionQuality(0.9f);
ColorModel colorModel = ColorModel.getRGBdefault();
iwp.setDestinationType(new javax.imageio.ImageTypeSpecifier(colorModel,
colorModel.createCompatibleSampleModel(8, 8)));
response.setContentType(request.getSession().getServletContext().getMimeType(id));
OutputStream os = response.getOutputStream();
MemoryCacheImageOutputStream output = new MemoryCacheImageOutputStream(os);
writer.setOutput(output);
IIOImage image = new IIOImage(buffImg, null, null);
writer.write(null, image, iwp);
writer.dispose();
output.flush();
output.close();
os.close();
buffImg = null;
}
//不设置宽度高度
public void diplayImage(HttpServletRequest request, HttpServletResponse response, String imgurl, String id) throws IOException {
response.setHeader("Cache-Control", "max-age=" + (7 * 24 * 60 * 60));
response.setDateHeader("Last-Modified", new Date().getTime());
if (request.getHeader("If-Modified-Since") != null) {
response.setStatus(304);
return;
}
//String imgurl = String.format(this.imgpath, id, id);
BufferedImage buffImg = ImageIO.read(new File(imgurl));
response.setContentType(request.getSession().getServletContext().getMimeType(id));
OutputStream os = response.getOutputStream();
ImageIO.write(buffImg, "JPEG", os);
os.flush();
os.close();
buffImg = null;
}
//视频
@RequestMapping(value = "/video/mid-{mediaid:.*}", method = RequestMethod.GET)
public void getvideo(HttpServletRequest request, HttpServletResponse response,
@PathVariable("mediaid") String mediaid) throws FileNotFoundException, IOException {
try {
if (mediaid.length() < 2) {
response.sendError(404, "exp");
return;
}
String voidurl = rootpath + mediaid.substring(0, 2) + "/" + mediaid.substring(2);
BufferedInputStream buffImg = new BufferedInputStream(new FileInputStream(new File(voidurl)));
if (mediaDao.getMiediatype(mediaid).equals("")) {
response.sendError(404, "exp");
return;
}
response.setContentType(mediaDao.getMiediatype(mediaid));
byte[] b = new byte[buffImg.available()];
buffImg.read(b);
response.getOutputStream().write(b);
response.getOutputStream().flush();
response.getOutputStream().close();
} catch (Exception ex) {
response.sendError(500, "exp");
return;
}
}
页面直接<img src='项目名/Action/...'>直接显示
视频一样直接显示
getpicByeventid方法的异常处理时response.sendError(500, "exp");直接在http头中加入500并返回，但是因为读取图片是直接在http头中的以io流写进去，并且push出去的，所以异常以后再那边在给http头中写数据就会出现异常.........最好的改动是将response.sendError(500, "exp");这个换为一个logger日志打印出来就好
