fastdfs使用

一、创建一个maven的webproject，叫file-manager:mvnarchetype:create-DgroupId=platform.activity.filemanager-DartifactId=file-manager-DarchetypeArtifactId=maven-archetype-webapp

二、定义一个fastDFS的客户端文件fdfs_client.conf：

class="properties" name="code">connect_timeout = 2
network_timeout = 30
charset = UTF-8
http.tracker_http_port = 8080
http.anti_steal_token = no
http.secret_key = FastDFS1234567890

tracker_server = 192.168.1.156:22122
#tracker_server = 192.168.1.188:22122

#storage_server = 192.168.1.155:23000 #no need here

三、定义一个配置接口：

package com.chuanliu.platform.activity.fm.manager;
import java.io.Serializable;
public interface FileManagerConfig extends Serializable {
  public static final String FILE_DEFAULT_WIDTH     = "120";
  public static final String FILE_DEFAULT_HEIGHT     = "120";
  public static final String FILE_DEFAULT_AUTHOR     = "Diandi";
  public static final String PROTOCOL = "http://";
  public static final String SEPARATOR = "/";
  public static final String TRACKER_NGNIX_PORT     = "8080";
  public static final String CLIENT_CONFIG_FILE   = "fdfs_client.conf";  
}

四、封装一个FastDFS文件Bean

package com.chuanliu.platform.activity.fm.manager;
public class FastDFSFile implements FileManagerConfig {
  private static final long serialVersionUID = -996760121932438618L;
  private String name;
  private byte[] content;
  private String ext;
  private String height = FILE_DEFAULT_HEIGHT;
  private String width = FILE_DEFAULT_WIDTH;
  private String author = FILE_DEFAULT_AUTHOR;
  public FastDFSFile(String name, byte[] content, String ext, String height,String width, String author) {
    super();
    this.name = name;
    this.content = content;
    this.ext = ext;
    this.height = height;
    this.width = width;
    this.author = author;
  }
  public FastDFSFile(String name, byte[] content, String ext) {
    super();
    this.name = name;
    this.content = content;
    this.ext = ext;
  }
  public byte[] getContent() {
    return content;
  }
  public void setContent(byte[] content) {
    this.content = content;
  }
  public String getExt() {
    return ext;
  }
  public void setExt(String ext) {
    this.ext = ext;
  }
  public String getHeight() {
    return height;
  }
  public void setHeight(String height) {
    this.height = height;
  }
  public String getWidth() {
    return width;
  }
  public void setWidth(String width) {
    this.width = width;
  }
  public String getAuthor() {
    return author;
  }
  public void setAuthor(String author) {
    this.author = author;
  }
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  } 
}

五、定义核心的FileManager类，里面包含有上传、删除、获取文件的方法：

package com.chuanliu.platform.activity.fm.manager;
import java.io.File;
import java.io.IOException;
import org.apache.log4j.Logger;
import org.csource.common.NameValuePair;
import org.csource.fastdfs.ClientGlobal;
import org.csource.fastdfs.FileInfo;
import org.csource.fastdfs.ServerInfo;
import org.csource.fastdfs.StorageClient;
import org.csource.fastdfs.StorageServer;
import org.csource.fastdfs.TrackerClient;
import org.csource.fastdfs.TrackerServer;
import com.chuanliu.platform.activity.basic.util.LoggerUtils;
public class FileManager implements FileManagerConfig {
  private static final long serialVersionUID = 1L;
  private static Logger logger  = Logger.getLogger(FileManager.class);
  private static TrackerClient  trackerClient;
  private static TrackerServer  trackerServer;
  private static StorageServer  storageServer;
  private static StorageClient  storageClient;
  static { // Initialize Fast DFS Client configurations
    try {
      String classPath = new File(FileManager.class.getResource("/").getFile()).getCanonicalPath();
      String fdfsClientConfigFilePath = classPath + File.separator + CLIENT_CONFIG_FILE;
      logger.info("Fast DFS configuration file path:" + fdfsClientConfigFilePath);
      ClientGlobal.init(fdfsClientConfigFilePath);
      trackerClient = new TrackerClient();
      trackerServer = trackerClient.getConnection();
      storageClient = new StorageClient(trackerServer, storageServer);
    } catch (Exception e) {
      LoggerUtils.error(logger,  e);  
    }
  }
    
  public static String upload(FastDFSFile file) {
    LoggerUtils.info(logger, "File Name: " + file.getName() + "File Length: " + file.getContent().length);
    NameValuePair[] meta_list = new NameValuePair[3];
      meta_list[0] = new NameValuePair("width", "120");
      meta_list[1] = new NameValuePair("heigth", "120");
      meta_list[2] = new NameValuePair("author", "Diandi");
      long startTime = System.currentTimeMillis();
    String[] uploadResults = null;
    try {
      uploadResults = storageClient.upload_file(file.getContent(), file.getExt(), meta_list);
    } catch (IOException e) {
      logger.error("IO Exception when uploadind the file: " + file.getName(), e);
    } catch (Exception e) {
      logger.error("Non IO Exception when uploadind the file: " + file.getName(), e);
    }
    logger.info("upload_file time used: " + (System.currentTimeMillis() - startTime) + " ms");
    
    if (uploadResults == null) {
      LoggerUtils.error(logger, "upload file fail, error code: " + storageClient.getErrorCode());
    }
    
    String groupName         = uploadResults[0];
    String remoteFileName   = uploadResults[1];
    
    String fileAbsolutePath = PROTOCOL + trackerServer.getInetSocketAddress().getHostName() 
        + SEPARATOR
        + TRACKER_NGNIX_PORT
        + SEPARATOR 
        + groupName 
        + SEPARATOR 
        + remoteFileName;
    LoggerUtils.info(logger, "upload file successfully!!!  " +"group_name: " + groupName + ", remoteFileName:"
        + " " + remoteFileName);
    return fileAbsolutePath;
  }
  
  public static FileInfo getFile(String groupName, String remoteFileName) {
    try {
      return storageClient.get_file_info(groupName, remoteFileName);
    } catch (IOException e) {
      logger.error("IO Exception: Get File from Fast DFS failed", e);
    } catch (Exception e) {
      logger.error("Non IO Exception: Get File from Fast DFS failed", e);
    }
    return null;
  }
  
  public static void deleteFile(String groupName, String remoteFileName) throws Exception {
    storageClient.delete_file(groupName, remoteFileName);
  }
  
  public static StorageServer[] getStoreStorages(String groupName) throws IOException {
    return trackerClient.getStoreStorages(trackerServer, groupName);
  }
  
  public static ServerInfo[] getFetchStorages(String groupName, String remoteFileName) throws IOException {
    return trackerClient.getFetchStorages(trackerServer, groupName, remoteFileName);
  }
}

六、Unit Test测试类

package manager;
import java.io.File;
import java.io.FileInputStream;

import org.csource.fastdfs.FileInfo;
import org.csource.fastdfs.ServerInfo;
import org.csource.fastdfs.StorageServer;
import org.junit.Test;
import org.springframework.util.Assert;

import com.chuanliu.platform.activity.fm.manager.FastDFSFile;
import com.chuanliu.platform.activity.fm.manager.FileManager;

/**
 * @author Josh Wang(Sheng)
 *
 * @email  josh_wang23@hotmail.com
 */
public class TestFileManager {

  @Test
  public void upload() throws Exception {
    File content = new File("C:\520.jpg");
    
    FileInputStream fis = new FileInputStream(content);
      byte[] file_buff = null;
      if (fis != null) {
          int len = fis.available();
          file_buff = new byte[len];
          fis.read(file_buff);
      }
    
    FastDFSFile file = new FastDFSFile("520", file_buff, "jpg");
    
    String fileAbsolutePath = FileManager.upload(file);
    System.out.println(fileAbsolutePath);
    fis.close();
  }
  
  @Test
  public void getFile() throws Exception {
    FileInfo file = FileManager.getFile("group1", "M00/00/00/wKgBm1N1-CiANRLmAABygPyzdlw073.jpg");
    Assert.notNull(file);
    String sourceIpAddr = file.getSourceIpAddr();
      long size = file.getFileSize();
      System.out.println("ip:" + sourceIpAddr + ",size:" + size);
  }
  
  @Test
  public void getStorageServer() throws Exception {
    StorageServer[] ss = FileManager.getStoreStorages("group1");
    Assert.notNull(ss);
    for (int k = 0; k < ss.length; k++){
      System.err.println(k + 1 + ". " + ss[k].getInetSocketAddress().getAddress().getHostAddress() + ":" + ss[k].getInetSocketAddress().getPort());
      }
  }
  @Test
  public void getFetchStorages() throws Exception {
    ServerInfo[] servers = FileManager.getFetchStorages("group1", "M00/00/00/wKgBm1N1-CiANRLmAABygPyzdlw073.jpg");
    Assert.notNull(servers);
    for (int k = 0; k < servers.length; k++) {
            System.err.println(k + 1 + ". " + servers[k].getIpAddr() + ":" + servers[k].getPort());
        }
  }
}