fastDFS與java整合文件上傳下載
阿新 • • 發佈:2018-05-03
snap spa generate mapping oba exe try file getclass
準備
- 下載
fastdfs-client-java
源碼
源碼地址 密碼:s3sw
修改
pom.xml
第一個plugins是必需要的,是maven用來編譯的插件,第二個是maven打源碼包的,可以不要。<build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.5.1</version>
將
fastdfs-client-java
打包
直接項目右鍵,run as maven install
install成功後,fastdfs-client-java就成功的被安裝到本地倉庫了。
---編寫工具類:
- 把
fdfs_client.conf
文件復制一份放到自己項目的resource下面;修改裏面的tracker.server
,其它的都不用動:
在項目的
pom.xml
中添加依賴<dependency> <groupId>org.csource</groupId> <artifactId>fastdfs-client-java</artifactId> <version>1.27-SNAPSHOT</version> </dependency>
首先來實現文件上傳,
fastdfs-client-java
的上傳是通過傳入一個byte[ ]來完成的,簡單看一下源碼:public String[] upload_file(byte[] file_buff, String file_ext_name, NameValuePair[] meta_list) throws IOException, MyException{ final String group_name = null; return this.upload_file(group_name, file_buff, 0, file_buff.length, file_ext_name, meta_list); }
文件屬性
package com.wuwii.utils;
import java.io.Serializable;
import java.util.Arrays;
/**
* @ClassName FastDFSFile
* @Description FastDFS上傳文件業務對象
* @author zhangkai
* @date 2017年7月18日
*/
public class FastDFSFile implements Serializable{
private static final long serialVersionUID = 2637755431406080379L;
/**
* 文件二進制
*/
private byte[] content;
/**
* 文件名稱
*/
private String name;
/**
* 文件長度
*/
private Long size;
public FastDFSFile(){
}
public FastDFSFile(byte[] content, String name, Long size){
this.content = content;
this.name = name;
this.size = size;
}
public byte[] getContent() {
return content;
}
public void setContent(byte[] content) {
this.content = content;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Long getSize() {
return size;
}
public void setSize(Long size) {
this.size = size;
}
public static long getSerialversionuid() {
return serialVersionUID;
}
}
編寫FastDFS工具類
package com.wuwii.utils;
import java.io.Serializable;
import org.apache.commons.io.FilenameUtils;
import org.csource.common.NameValuePair;
import org.csource.fastdfs.ClientGlobal;
import org.csource.fastdfs.StorageClient1;
import org.csource.fastdfs.TrackerClient;
import org.csource.fastdfs.TrackerServer;
import org.jetbrains.annotations.NotNull;
import org.springframework.core.io.ClassPathResource;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
/**
* @ClassName FastDFSUtils
* @Description FastDFS工具類
* @author zhangkai
* @date 2017年7月18日
*/
public class FastDFSUtils implements Serializable{
/**
*
*/
private static final long serialVersionUID = -4462272673174266738L;
private static TrackerClient trackerClient;
private static TrackerServer trackerServer;
private static StorageClient1 storageClient1;
static {
try {
//clientGloble讀配置文件
ClassPathResource resource = new ClassPathResource("fdfs_client.conf");
ClientGlobal.init(resource.getClassLoader().getResource("fdfs_client.conf").getPath());
//trackerclient
trackerClient = new TrackerClient();
trackerServer = trackerClient.getConnection();
//storageclient
storageClient1 = new StorageClient1(trackerServer,null);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* fastDFS文件上傳
* @param file 上傳的文件 FastDFSFile
* @return String 返回文件的絕對路徑
*/
public static String uploadFile(FastDFSFile file){
String path = null;
try {
//文件擴展名
String ext = FilenameUtils.getExtension(file.getName());
//mata list是表文件的描述
NameValuePair[] mata_list = new NameValuePair[3];
mata_list[0] = new NameValuePair("fileName",file.getName());
mata_list[1] = new NameValuePair("fileExt",ext);
mata_list[2] = new NameValuePair("fileSize",String.valueOf(file.getSize()));
path = storageClient1.upload_file1(file.getContent(), ext, mata_list);
} catch (Exception e) {
e.printStackTrace();
}
return path;
}
/**
* fastDFS文件下載
* @param groupName 組名
* @param remoteFileName 文件名
* @param specFileName 真實文件名
* @return ResponseEntity<byte[]>
*/
@org.jetbrains.annotations.NotNull
public static ResponseEntity<byte[]> downloadFile(String groupName, String remoteFileName, String specFileName){
byte[] content = null;
HttpHeaders headers = new HttpHeaders();
try {
content = storageClient1.download_file(groupName, remoteFileName);
headers.setContentDispositionFormData("attachment", new String(specFileName.getBytes("UTF-8"),"iso-8859-1"));
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
} catch (Exception e) {
e.printStackTrace();
}
return new ResponseEntity<byte[]>(content, headers, HttpStatus.CREATED);
}
/**
* 根據fastDFS返回的path得到文件的組名
* @param path fastDFS返回的path
* @return
*/
public static String getGroupFormFilePath(String path){
return path.split("/")[0];
}
/**
* 根據fastDFS返回的path得到文件名
* @param path fastDFS返回的path
* @return
*/
@NotNull
public static String getFileNameFormFilePath(String path) {
return path.substring(path.indexOf("/")+1);
}
}
測試Controller
package com.wuwii.controller;
import java.io.IOException;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.multipart.MultipartFile;
import com.wuwii.utils.FastDFSFile;
import com.wuwii.utils.FastDFSUtils;
import com.wuwii.utils.PropertyUtil;
/**
* FastFDS控制器
* @author zhangkai
*
*/
@Controller
@RequestMapping(value = "/fastdfs")
public class FastFDSController {
@RequestMapping(value = "/upload", method = RequestMethod.POST)
public String upload (MultipartFile file){
try {
FastDFSFile fastDFSFile = new FastDFSFile(file.getBytes(), file.getOriginalFilename(), file.getSize());
String path = FastDFSUtils.uploadFile(fastDFSFile);
return "redirect:"+ PropertyUtil.get("fastFDS_server") + path;
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@RequestMapping(value = "/download")
public ResponseEntity<byte[]> download (String path, String specFileName){
String filename = FastDFSUtils.getFileNameFormFilePath(path);
String group = FastDFSUtils.getGroupFormFilePath(path);
return FastDFSUtils.downloadFile(group, filename, specFileName);
}
}
最後附上讀取配置文件的工具類PropertyUtil
package com.wuwii.utils;
import java.io.InputStream;
import java.util.Properties;
/**
* @ClassName PropertyUtil
* @Description 讀取配置文件的內容(key,value)
* @author zhangkai
* @date 2017年7月18日
*/
public class PropertyUtil {
public static final Properties PROP = new Properties();
/**
* @Method: get
* @Description: 讀取配置文件的內容(key,value)
* @param key
* @return String
* @throws
*/
public static String get(String key) {
if (PROP.isEmpty()) {
try {
InputStream in = PropertyUtil.class.getResourceAsStream("/config.properties");
PROP.load(in);
in.close();
} catch (Exception e) {}
}
return PROP.getProperty(key);
}
}
測試
上傳!
下載
下載就很簡單了,因為直接獲得到二進制流了,返回給客戶端即可。
下載需要主要的是,要註意從FastDFS返回的文件名是這種隨機碼,因此我們需要在上傳的時候將文件本身的名字存到數據庫,再到下載的時候對文件頭重新設置名字即可。
fastDFS與java整合文件上傳下載