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）
三、实现流程：
1、配置依赖：因为我们使用的maven来管理工程，所以，我们需要去陪pom文件
[html]
view plain
copy
print
?
<project xmlns=
“http://maven.apache.org/POM/4.0.0” xmlns:xsi=
“http://www.w3.org/2001/XMLSchema-instance” xsi:schemaLocation=
“http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd”> <modelVersion>4.0.0
</modelVersion> <groupId>com.leech
</groupId> <artifactId>fastdfs-demo
</artifactId> <version>0.0.1-SNAPSHOT
</version> <packaging>jar
</packaging> <name>fastdfs-demo
</name> <url>http://maven.apache.org
</url> <properties> <project.build.sourceEncoding>UTF-8
</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>junit
</groupId> <artifactId>junit
</artifactId> <version>4.11
</version> <scope>test
</scope> </dependency> <dependency> <groupId>org.csource
</groupId> <artifactId>fastdfs-client-java
</artifactId> <version>1.25
</version> </dependency> <dependency> <groupId>commons-io
</groupId> <artifactId>commons-io
</artifactId> <version>2.4
</version> </dependency> </dependencies> </project>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.leech</groupId>
<artifactId>fastdfs-demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>fastdfs-demo</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.csource</groupId>
<artifactId>fastdfs-client-java</artifactId>
<version>1.25</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>
</dependencies>
</project>
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。
2、新建fdfs_client.conf文件，在我们的itoo中，我们建立在（src/main/resources底下）
[html]
view plain
copy
print
?
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
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：
[java]
view plain
copy
print
?
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) { 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); }
@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) { StringBuffer sbPath =
new StringBuffer(); sbPath.append(
”http://192.168.22.252”);
try { 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”); TrackerClient trackerClient =
new TrackerClient(); TrackerServer trackerServer = trackerClient.getConnection(); StorageServer storageServer =
null; StorageClient storageClient =
new StorageClient(trackerServer, storageServer); String[] strings = storageClient.upload_file(byteFile, ext_file,
null);
for (String string : strings) { sbPath.append(
”/” + string); System.out.println(string); } System.out.println(sbPath); }
catch (IOException | MyException e) { e.printStackTrace(); }
return sbPath.toString(); }
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。
4、FastDFS实现文件下载：
[java]
view plain
copy
print
?
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 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();
}
}
5、FastDFS获取将上传文件信息：
[java]
view plain
copy
print
?
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 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();
}
}
6、FastDFS获取文件名称：
[java]
view plain
copy
print
?
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 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();
}
}
7、FastDFS实现删除文件：
[java]
view plain
copy
print
?
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(); } }
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();
}
}
