java 断点续传（springMvc），可支持html5 vedio在线播放 posted @ 2017年3月11日 16:15:44

Controller

@RequestMapping(value = "/getVedio")
public void getVedio(HttpServletRequest request, HttpServletResponse response) throws IOException {

String path = "d:/tmp/pic/bb.mp4";
BufferedInputStream bis = null;
try {
File file = new File(path);
if (file.exists()) {
long p = 0L;
long toLength = 0L;
long contentLength = 3L;
int rangeSwitch = 0; // 0,从头开始的全文下载；1,从某字节开始的下载（bytes=27000-）；2,从某字节开始到某字节结束的下载（bytes=27000-39000）
long fileLength;
String rangBytes = "";
fileLength = file.length();

// get file content
InputStream ins = new FileInputStream(file);
bis = new BufferedInputStream(ins);

// tell the client to allow accept-ranges
response.reset();
response.setHeader("Accept-Ranges", "bytes");

// client requests a file block download start byte
String range = request.getHeader("Range");
if (range != null && range.trim().length() > 0 && !"null".equals(range)) {
response.setStatus(javax.servlet.http.HttpServletResponse.SC_PARTIAL_CONTENT);
rangBytes = range.replaceAll("bytes=", "");
if (rangBytes.endsWith("-")) {  // bytes=270000-
rangeSwitch = 1;
p = Long.parseLong(rangBytes.substring(0, rangBytes.indexOf("-")));
contentLength = fileLength - p;  // 客户端请求的是270000之后的字节（包括bytes下标索引为270000的字节）
} else { // bytes=270000-320000
rangeSwitch = 2;
String temp1 = rangBytes.substring(0, rangBytes.indexOf("-"));
String temp2 = rangBytes.substring(rangBytes.indexOf("-") + 1, rangBytes.length());
p = Long.parseLong(temp1);
toLength = Long.parseLong(temp2);
contentLength = toLength - p + 1; // 客户端请求的是 270000-320000 之间的字节
}
} else {
contentLength = fileLength;
}

// 如果设设置了Content-Length，则客户端会自动进行多线程下载。如果不希望支持多线程，则不要设置这个参数。
// Content-Length: [文件的总大小] - [客户端请求的下载的文件块的开始字节]
response.setHeader("Content-Length", new Long(contentLength).toString());

// 断点开始
// 响应的格式是:
// Content-Range: bytes [文件块的开始字节]-[文件的总大小 - 1]/[文件的总大小]
if (rangeSwitch == 1) {
String contentRange = new StringBuffer("bytes ").append(new Long(p).toString()).append("-")
.append(new Long(fileLength - 1).toString()).append("/")
.append(new Long(fileLength).toString()).toString();
response.setHeader("Content-Range", contentRange);
bis.skip(p);
} else if (rangeSwitch == 2) {
String contentRange = range.replace("=", " ") + "/" + new Long(fileLength).toString();
response.setHeader("Content-Range", contentRange);
bis.skip(p);
} else {
String contentRange = new StringBuffer("bytes ").append("0-")
.append(fileLength - 1).append("/")
.append(fileLength).toString();
response.setHeader("Content-Range", contentRange);
}

String fileName = file.getName();
response.setContentType("application/octet-stream");
response.addHeader("Content-Disposition", "attachment;filename=" + fileName);

OutputStream out = response.getOutputStream();
int n = 0;
long readLength = 0;
int bsize = 1024;
byte[] bytes = new byte[bsize];
if (rangeSwitch == 2) {
// 针对 bytes=27000-39000 的请求，从27000开始写数据
while (readLength <= contentLength - bsize) {
n = bis.read(bytes);
readLength += n;
out.write(bytes, 0, n);
}
if (readLength <= contentLength) {
n = bis.read(bytes, 0, (int) (contentLength - readLength));
out.write(bytes, 0, n);
}
} else {
while ((n = bis.read(bytes)) != -1) {
out.write(bytes, 0, n);
}
}
out.flush();
out.close();
bis.close();
} else {
//                if (logger.isDebugEnabled()) {
//                    logger.debug("Error: file " + path + " not found.");
//                }
}
} catch (IOException ie) {
// 忽略 ClientAbortException 之类的异常
} catch (Exception e) {
//            logger.error(e.getMessage());
}

}

<vedio src='"+path+"' autoplay='autoplay' controls='controls' id='player'></vedio>

<audio src='"+path+"' autoplay='autoplay' controls='controls' id='player'></audio>