正好,淘淘商城讲这一块的时候,我又想起来当时老徐让我写过一个关于实现FastDFS实现文件上传下载的使用文档,当时结合我们的ITOO的视频系统和毕业论文系统,整理了一下,有根据网上查到的知识,总结了一点东西,下面分享一下
一、FastDFS简介:
参见博客:http://blog.csdn.net/liweizhong193516/article/details/53234486
二、FastDFS使用流程介绍:
我们在itoo的dobbu+zk框架中使用fastdfs+nginx+mysql实现上传附件的功能,主要原理就是将附件上传到fastdfs得到一个文件的链接路径url,我们获取到这个url将他以字符串形式保存到我们的mysql中,下载的时候获取到这个url直接打开或者下载附件。(url内容参见博客:http://blog.csdn.net/liweizhong193516/article/details/52556526)
默认的,我们就知道fastdfs后面还有一个nginx服务器,当我们进行存储文件的时候,我们要通过fastdfs给我们生成一个保存地址,也就是grounpID 和保存地址,然后将文件存在fastdfs服务器中,fastdfs中有许多的16进制命名文件夹,文件夹中套文件夹;当我们进行读取文件的时候,我们要通过获取mysql里面的相应文件的存储地址去nginx服务器中通过url路径文件名,从fastdfs文件中取出我们的文件进行展示。(所以下载图,有点问题,在这里解释一下)
4.0.0
com.leech
fastdfs-demo
0.0.1-SNAPSHOT
jar
fastdfs-demo
http://maven.apache.org
UTF-8
junit
junit
4.11
test
org.csource
fastdfs-client-java
1.25
commons-io
commons-io
2.4
当然,更多时候我们利用maven的继承特性,直接配置在父工程中,然后继承下来就o了。
connect_timeout = 2
network_timeout = 30
charset = UTF-8
http.tracker_http_port = 80
#没什么用
http.anti_steal_token = no
http.secret_key = FastDFS1234567890
tracker_server = 192.168.17.112:22122
#tracker_server = 192.168.0.119:22122
3、实现文件上传:
public void save(HttpServletRequest request,HttpServletResponse response){
String videoName=request.getParameter("videoName");
String videoType=request.getParameter("videoType");
String videoDesc=request.getParameter("videoDesc");
String videoPath=request.getParameter("videoPath");
String picturePath=request.getParameter("picturePath");
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date uploadTime=null;
try {
uploadTime = formatter.parse(formatter.format(new Date()));
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
JacksonJsonUntil jackJsonUtil =new JacksonJsonUntil ();
String dataBaseName = "itoo_video";
Video video=new Video();
video.setUserName("why");
video.setUserID("why");
video.setVideoName(videoName);
video.setVideoPath(videoPath);
video.setVideoType(videoType);
video.setVideoDesc(videoDesc);
video.setDataBaseName(dataBaseName);
video.setPicturePath(picturePath);
video.setUploadTime(uploadTime);
uploadFileService.save(video);
jackJsonUtil.beanToJson(response,video);
}
/*
* 上传文件
*/
@RequestMapping(value={"/upload"})
@ResponseBody
public void upload( MultipartFile file, HttpServletRequest request,HttpServletResponse response){
String ext_Name = file.getOriginalFilename().split("\\.")[1];
String videoName=file.getOriginalFilename().split("\\.")[0];
byte[] bytes = null;
try {
bytes = file.getBytes();
} catch (IOException e) {
e.printStackTrace();
}
String videoPath=uploadFile(bytes,ext_Name);
JacksonJsonUntil jackJsonUtil =new JacksonJsonUntil ();
Video video=new Video();
video.setVideoPath(videoPath);
video.setVideoName(videoName);
jackJsonUtil.beanToJson(response,video);
}
public String uploadFile(byte[] byteFile, String ext_file) {
// 拼接服务区的文件路径
StringBuffer sbPath = new StringBuffer();
sbPath.append("http://192.168.22.252");
try {
// 初始化文件资源
ClientGlobal
.init("C:\\Users\\alsr\\Desktop\\ITOO-5.0\\itoo-video-Test\\dmsd-itoo-video-parent\\dmsd-itoo-video-web\\src\\main\\resources\\fdfs_client.conf");
// 链接FastDFS服务器,创建tracker和Stroage
TrackerClient trackerClient = new TrackerClient();
TrackerServer trackerServer = trackerClient.getConnection();
StorageServer storageServer = null;
StorageClient storageClient = new StorageClient(trackerServer,
storageServer);
//利用字节流上传文件
String[] strings = storageClient.upload_file(byteFile, ext_file, null);
for (String string : strings) {
sbPath.append("/" + string);
System.out.println(string);
}
// 全路径
System.out.println(sbPath);
} catch (IOException | MyException e) {
e.printStackTrace();
}
return sbPath.toString();
}
只要我们能正常接收到一个json类型的字符串(url地址),就证明我们已经上传成功了,如果不信,可以直接用浏览器去验证一下,看看能不能得到文件展示。
public void testDownload() {
try {
ClientGlobal.init(conf_filename);
TrackerClient tracker = new TrackerClient();
TrackerServer trackerServer = tracker.getConnection();
StorageServer storageServer = null;
StorageClient storageClient = new StorageClient(trackerServer, storageServer);
byte[] b = storageClient.download_file("group1", "M00/00/00/wKgRcFV_08OAK_KCAAAA5fm_sy874.conf");
System.out.println(b);
IOUtils.write(b, new FileOutputStream("D:/"+UUID.randomUUID().toString()+".conf"));
}
catch (Exception e) {
e.printStackTrace();
}
}
public void testGetFileInfo(){
try {
ClientGlobal.init(conf_filename);
TrackerClient tracker = new TrackerClient();
TrackerServer trackerServer = tracker.getConnection();
StorageServer storageServer = null;
StorageClient storageClient = new StorageClient(trackerServer, storageServer);
FileInfo fi = storageClient.get_file_info("group1", "M00/00/00/wKgRcFV_08OAK_KCAAAA5fm_sy874.conf");
System.out.println(fi.getSourceIpAddr()); System.out.println(fi.getFileSize());
System.out.println(fi.getCreateTimestamp()); System.out.println(fi.getCrc32());
}
catch (Exception e) {
e.printStackTrace();
}
}
public void testGetFileMate(){
try {
ClientGlobal.init(conf_filename);
TrackerClient tracker = new TrackerClient();
TrackerServer trackerServer = tracker.getConnection();
StorageServer storageServer = null;
StorageClient storageClient = new StorageClient(trackerServer,
storageServer);
NameValuePair nvps [] = storageClient.get_metadata("group1", "M00/00/00/wKgRcFV_08OAK_KCAAAA5fm_sy874.conf");
for(NameValuePair nvp : nvps){
System.out.println(nvp.getName() + ":" + nvp.getValue());
}
}
catch (Exception e) {
e.printStackTrace();
}
}
public void testDelete(){
try {
ClientGlobal.init(conf_filename);
TrackerClient tracker = new TrackerClient();
TrackerServer trackerServer = tracker.getConnection();
StorageServer storageServer = null;
StorageClient storageClient = new StorageClient(trackerServer,storageServer);
int i = storageClient.delete_file("group1", "M00/00/00/wKgRcFV_08OAK_KCAAAA5fm_sy874.conf");
System.out.println( i==0 ? "删除成功" : "删除失败:"+i);
}
catch (Exception e) {
e.printStackTrace();
}
}