FastDFS：实现文件的上传、下载、修改、删除
1、maven项目中，在pom中添加 fastdfs_client 依赖
#添加依赖
org.csource
fastdfs-client-java
5.0.4
#说明：
#由于fastdfs-client-java jar包没有上传到中央仓库，所以需要下载源码进行maven编译再上传到私服，然
#后通过私服下载或者通过jar包的形式进行下载
2、在src/main/resource 下创建 fdfs_client.conf 配置文件
#fdfs_client.conf 配置
connect_timeout = 10
network_timeout = 30
charset = UTF-8
http.tracker_http_port = 8888
http.anti_steal_token = no
http.secret_key = FastDFS1234567890
tracker_server = 100.98.22.253:22122
#如果有多台服务，指定集群的IP
#tracker_server = 192.168.10.250:22122
3、客户端代码实例
package util;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.commons.lang3.StringUtils;
import org.apache.log4j.Logger;
import org.csource.common.NameValuePair;
import org.csource.fastdfs.ClientGlobal;
import org.csource.fastdfs.StorageClient1;
import org.csource.fastdfs.StorageServer;
import org.csource.fastdfs.TrackerClient;
import org.csource.fastdfs.TrackerGroup;
import org.csource.fastdfs.TrackerServer;
/**
*
* 系统名称：
* 模块名称：
* 中文类名：FastDFS分布式文件系统操作客户端
* 概要说明：FastDFS分布式文件系统操作客户端
* @author bhz
* @since 2013年11月10日
*/
public class FastDFSClientUtils {
private static final String CONF_FILENAME = Thread.currentThread().getContextClassLoader().getResource("fastdfs_client.conf").getPath();
private static Logger logger = Logger.getLogger(FastDFSClientUtils.class);
private static TrackerClient trackerClient;
//加载文件
static {
try {
ClientGlobal.init(CONF_FILENAME);
TrackerGroup trackerGroup = ClientGlobal.g_tracker_group;
trackerClient = new TrackerClient(trackerGroup);
} catch (Exception e) {
logger.error(e);
}
}
/**
* 方法名称：上传方法
* 概要说明：
* @param file 文件
* @param path 路径
* @return 上传成功返回id，失败返回null
*/
public static String upload(File file, String path) {
TrackerServer trackerServer = null;
StorageServer storageServer = null;
StorageClient1 storageClient1 = null;
FileInputStream fis = null;
try {
NameValuePair[] meta_list = null; // new NameValuePair[0];
fis = new FileInputStream(file);
byte[] file_buff = null;
if (fis != null) {
int len = fis.available();
file_buff = new byte[len];
fis.read(file_buff);
}
trackerServer = trackerClient.getConnection();
if (trackerServer == null) {
logger.error("getConnection return null");
}
storageServer = trackerClient.getStoreStorage(trackerServer);
storageClient1 = new StorageClient1(trackerServer, storageServer);
String fileid = storageClient1.upload_file1(file_buff, getFileExt(path), meta_list);
return fileid;
} catch (Exception ex) {
logger.error(ex);
return null;
}finally{
if (fis != null){
try {
fis.close();
} catch (IOException e) {
logger.error(e);
}
}
if (storageServer != null){
try {
storageServer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (trackerServer != null){
try {
trackerServer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
storageClient1 = null;
}
}
/**
* 方法名称：上传方法
* 概要说明：
* @param data 数据
* @param path 路径
* @return 上传成功返回id，失败返回null
*/
public static String upload(byte[] data, String extName) {
TrackerServer trackerServer = null;
StorageServer storageServer = null;
StorageClient1 storageClient1 = null;
try {
NameValuePair[] meta_list = null; // new NameValuePair[0];
trackerServer = trackerClient.getConnection();
if (trackerServer == null) {
logger.error("getConnection return null");
}
storageServer = trackerClient.getStoreStorage(trackerServer);
storageClient1 = new StorageClient1(trackerServer, storageServer);
String fileid = storageClient1.upload_file1(data, extName, meta_list);
return fileid;
} catch (Exception ex) {
logger.error(ex);
return null;
}finally{
if (storageServer != null){
try {
storageServer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (trackerServer != null){
try {
trackerServer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
storageClient1 = null;
}
}
/**
* 方法名称：下载方法
* 概要说明：通过文件id进行下载
* @param fileId 文件id
* @return 返回InputStream
*/
public static InputStream download(String groupName, String fileId) {
TrackerServer trackerServer = null;
StorageServer storageServer = null;
StorageClient1 storageClient1 = null;
try {
trackerServer = trackerClient.getConnection();
if (trackerServer == null) {
logger.error("getConnection return null");
}
storageServer = trackerClient.getStoreStorage(trackerServer, groupName);
storageClient1 = new StorageClient1(trackerServer, storageServer);
byte[] bytes = storageClient1.download_file1(fileId);
InputStream inputStream = new ByteArrayInputStream(bytes);
return inputStream;
} catch (Exception ex) {
logger.error(ex);
return null;
} finally {
if (storageServer != null){
try {
storageServer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (trackerServer != null){
try {
trackerServer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
storageClient1 = null;
}
}
/**
* 方法名称：删除方法
* 概要说明：根据id来删除一个文件
* @param fileId 文件id
* @return 删除成功返回0，非0则操作失败，返回错误代码
*/
public static int delete(String groupName, String fileId) {
TrackerServer trackerServer = null;
StorageServer storageServer = null;
StorageClient1 storageClient1 = null;
try {
trackerServer = trackerClient.getConnection();
if (trackerServer == null) {
logger.error("getConnection return null");
}
storageServer = trackerClient.getStoreStorage(trackerServer, groupName);
storageClient1 = new StorageClient1(trackerServer, storageServer);
int result = storageClient1.delete_file1(fileId);
return result;
} catch (Exception ex) {
logger.error(ex);
return 0;
} finally {
if (storageServer != null){
try {
storageServer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (trackerServer != null){
try {
trackerServer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
storageClient1 = null;
}
}
/**
* 方法名称：
* 概要说明：
* @param oldFileId 旧文件id
* @param file 新文件
* @param path 新文件路径
* @return 上传成功返回id，失败返回null
*/
public static String modify(String oldGroupName, String oldFileId, File file, String path) {
String fileid = null;
try {
// 先上传
fileid = upload(file, path);
if (fileid == null) {
return null;
}
// 再删除
int delResult = delete(oldGroupName, oldFileId);
if (delResult != 0) {
return null;
}
} catch (Exception ex) {
logger.error(ex);
return null;
}
return fileid;
}
/**
* 方法名称：获取文件后缀名
* 概要说明：获取文件后缀名
* @param fileName
* @return 如："jpg"、"txt"、"zip" 等
*/
private static String getFileExt(String fileName) {
if (StringUtils.isBlank(fileName) || !fileName.contains(".")) {
return "";
} else {
return fileName.substring(fileName.lastIndexOf(".") + 1);
}
}
}4、测试代码
package util;
import java.io.File;
import java.io.InputStream;
import org.apache.commons.io.FileUtils;
public class FastDFSTest {
/**
* 上传
*/
public static void upload() throws Exception {
// id: group1/M00/00/00/wKgBr1crVnSAbI4sAAAeV2aU4jU126.jpg
// fastdfsBasePath = http://192.168.1.170/fastdfs
// url: http://192.168.1.170/fastdfs/group1/M00/00/00/wKgBr1crVnSAbI4sAAAeV2aU4jU126.jpg
String path = System.getProperty("user.dir") + File.separatorChar + "source" + File.separatorChar + "001.jpg";
File file = new File(path);
String fileId = FastDFSClientUtils.upload(file, path);
System.out.println("本地文件：" + path + "，上传成功！ 文件ID为：" + fileId);
}
/**
* 下载
*/
public static void download() throws Exception {
// id: group1/M00/00/00/wKgBr1crVnSAbI4sAAAeV2aU4jU126.jpg
// url: http://192.168.1.170/fastdfs/group1/M00/00/00/wKgBr1crVnSAbI4sAAAeV2aU4jU126.jpg
String fileId = "group1/M00/00/00/wKgBr1crUIuAJ22iAADHTIxNXeI872.jpg";
InputStream inputStream = FastDFSClientUtils.download("group1", fileId);
System.out.println(inputStream.available());
String path = System.getProperty("user.dir") + File.separatorChar + "receive" + File.separatorChar + "001.jpg";
System.out.println(path);
//FileUtils.copyInputStreamToFile(inputStream, new File(path));
}
/**
* 删除
*/
public static void delete() throws Exception {
String fileId = "group1/M00/00/00/wKgBr1crVnSAbI4sAAAeV2aU4jU126.jpg";
int result = FastDFSClientUtils.delete("group1", fileId);
System.out.println(result == 0 ? "删除成功" : "删除失败:" + result);
}
/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
//upload();
download();
Thread.sleep(10000);
download();
Thread.sleep(10000);
download();
//delete();
}
}