FastDFS java 辅助类

package cn.saiz.drkms.task.crack.utils;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.csource.common.NameValuePair;
import org.csource.fastdfs.ClientGlobal;
import org.csource.fastdfs.FileInfo;
import org.csource.fastdfs.StorageClient;
import org.csource.fastdfs.StorageClient1;
import org.csource.fastdfs.StorageServer;
import org.csource.fastdfs.TrackerClient;
import org.csource.fastdfs.TrackerServer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class FastDFSUtil {

    public static Logger log = LoggerFactory.getLogger(FastDFSUtil.class);

    static {
        try {
            String path = System.getProperty("user.dir") + "/fdfs_client.conf";
            File file  = new File(path);
            if(file == null || !file.exists()){
                path = FastDFSUtil.class.getClassLoader()
                        .getResource("fdfs_client.conf").getPath();
                file = new File(path);
                if(file == null || !file.exists()){
                    path = Thread.currentThread().getContextClassLoader().
                            getResource("fdfs_client.conf").getPath();
                }
            }
            // 读取配置文件
            ClientGlobal.init(path);
        } catch (Exception e) {
            log.error("Init fastdfs error:{}",e.getMessage());
            throw new RuntimeException(e);
        }
    }

    public static StorageClient1 getClient() throws IOException {
        return new StorageClient1(new TrackerClient().getConnection(), null);
    }

    public static StorageClient1 getClient(TrackerServer trackerServer,StorageServer storageServer){
        return new StorageClient1(trackerServer, storageServer);
    }

    public static TrackerServer getTrackerServer() throws IOException{
        return new TrackerClient().getConnection();
    }

    public static void releaseServerResource(TrackerServer trackerServer,StorageServer storageServer) throws IOException{
        if(trackerServer != null) trackerServer.close();
        if(storageServer != null) storageServer.close();
    }
    ///////////////////上传文件////////////////
    public static String uploadFile(String filePath)
            throws IOException {
        return uploadFile(null, new File(filePath));
    }

    public static String uploadFile(String groupName, String filePath)
            throws IOException {
        return uploadFile(groupName, new File(filePath));
    }

    public static String uploadFile(String groupName, File file)
            throws IOException {
        if (file == null) return null;
        return uploadFile(groupName, new FileInputStream(file), file.getName(), file.length());
    }

    public static String uploadFile(File file) throws IOException {
        return uploadFile(null, file);
    }

    public static String uploadFile(InputStream input,String fileName, long fileLength)
            throws IOException {
        return uploadFile(null, input, fileName, fileLength);
    }

    public static String uploadFile(String groupName, InputStream inStream,
            String uploadFileName, long fileLength) throws IOException {
        return uploadByteFile(groupName, uploadFileName, fileLength, getFileBuffer(inStream, fileLength));
    }

    public static String uploadByteFile(String groupName,
            String fileName, long fileLength, byte[] fileBuff)
            throws IOException {
        String fileId = null;
        String fileExtName = null;
        if (fileName.contains(".")) {
            fileExtName = fileName.substring(fileName
                    .lastIndexOf(".") + 1);
        } else {
            log.warn("Fail to upload file, because the format of filename is illegal.");
            return fileId;
        }

        // 建立连接
        TrackerServer trackerServer = getTrackerServer();
        StorageServer storageServer = null;
        StorageClient1 client = getClient(trackerServer, storageServer);

        // 设置元信息
        NameValuePair[] metaList = new NameValuePair[3];
        metaList[0] = new NameValuePair("fileName", fileName);
        metaList[1] = new NameValuePair("fileExtName", fileExtName);
        metaList[2] = new NameValuePair("fileLength",
                String.valueOf(fileLength));

        // 上传文件
        try {
            fileId = client.upload_file1(groupName, fileBuff, fileExtName,
                    metaList);
            log.info("upload success. file id is: " + fileId);
        } catch (Exception e) {
            log.warn("Upload file \"" + fileName + "\"fails");
            throw new RuntimeException(e);
        } finally {
            releaseServerResource(trackerServer, storageServer);
        }
        return fileId;
    }
    //////////////////上传文件END/////////////////

    /////////////////下载文件////////////////////
    public static byte[] downloadFile(String groupName, String filepath)
            throws Exception {
        if(filepath == null || "".equals(filepath)) return null;
        TrackerServer trackerServer = null;
        StorageServer storageServer = null;
        try {
            TrackerClient tracker = new TrackerClient();
            trackerServer = tracker.getConnection();
            StorageClient storageClient = new StorageClient(trackerServer,
                    storageServer);
//            StorageClient1 storageClient1 = new StorageClient1(trackerServer,
//                    storageServer);
            return storageClient.download_file(groupName, filepath);
        } finally {
            releaseServerResource(trackerServer, storageServer);
        }
    }

    public static byte[] downloadFile(String fileId) throws Exception {
        TrackerServer trackerServer = null;
        StorageServer storageServer = null;
        try {
            trackerServer = getTrackerServer();
            StorageClient1 storageClient1 = getClient(trackerServer, storageServer);
            return storageClient1.download_file1(fileId);
        } finally {
            releaseServerResource(trackerServer, storageServer);
        }
    }

    public static void downloadFile(String fileId, OutputStream out)
            throws Exception {
        if(fileId != null && out != null){
            try {
                byte[] b = downloadFile(fileId);
                out.write(b);
                out.flush();
            } finally {
                out.close();
            }
        }
    }

    public static void downloadFile(String groupName, String filepath,
            OutputStream out) throws Exception {
        if(filepath != null && out != null){
            try {
                byte[] b = downloadFile(groupName, filepath);
                out.write(b);
                out.flush();
            } finally {
                out.close();
            }
        }
    }

    public static void downloadFile(String groupName, String filepath,
            File descFile) throws Exception {
        OutputStream out = null;
        try {
            out = new FileOutputStream(descFile);
            downloadFile(groupName, filepath, out);
        } finally {
            if(out != null)
                out.close();
        }
    }

    public static List<Map<String,String>> getFileMate(String groupName, String filepath)
            throws Exception {
        if(filepath == null) return null;
        TrackerServer trackerServer = getTrackerServer();
        StorageServer storageServer = null;
        StorageClient storageClient = getClient(trackerServer, storageServer);
        NameValuePair nvps[] = storageClient.get_metadata(groupName, filepath);
        List<Map<String,String>> list = new ArrayList<Map<String,String>>();
        for (NameValuePair nvp : nvps) {
            Map<String,String> map = new HashMap<String,String>();
            map.put(nvp.getName(), nvp.getValue());
            list.add(map);
        }
        return list;
    }

    /**
     * 删除文件
     * @return 0:删除成功 其他数值失败
     */
    public static int deleteFile(String groupName, String filepath)
            throws Exception {
        if(filepath == null) return -1;
        TrackerServer trackerServer = getTrackerServer();
        StorageServer storageServer = null;
        StorageClient storageClient = new StorageClient(trackerServer,
                storageServer);
        return storageClient.delete_file(groupName, filepath);
    }

    /**
     * 删除文件
     *
     * @param groupName
     * @param filepath
     * @throws Exception
     */
    public static int deleteFile(String fileId) throws Exception {
        if(fileId == null) return -1;
        TrackerServer trackerServer = null;
        StorageServer storageServer = null;
        try {
            trackerServer = getTrackerServer();
            StorageClient1 storageClient1 = getClient(trackerServer, storageServer);
            return storageClient1.delete_file1(fileId);
        } finally {
            releaseServerResource(trackerServer, storageServer);
        }
    }

    /**
     * 通过fileID查询上传的文件信息
     *
     * @param fileId
     *            eg:group1/M00/00/00/wKi3glS_XEaAVL3DAAwdkYUdoP8278.gif
     * @return
     * @throws Exception
     */
    public static FileInfo getFileInfo(String fileId) throws Exception {
        if (fileId == null) return null;
        TrackerServer trackerServer = getTrackerServer();
        StorageServer storageServer = null;
        try {
            StorageClient1 client = new StorageClient1(trackerServer, storageServer);
            return client.get_file_info1(fileId);
        } finally {
            releaseServerResource(trackerServer, storageServer);
        }
    }

    private static byte[] getFileBuffer(InputStream inStream, long fileLength)
            throws IOException {
        byte[] buffer = new byte[256 * 1024];
        byte[] fileBuffer = new byte[(int) fileLength];

        int count = 0;
        int length = 0;

        while ((length = inStream.read(buffer)) != -1) {
            for (int i = 0; i < length; ++i) {
                fileBuffer[count + i] = buffer[i];
            }
            count += length;
        }
        return fileBuffer;
    }

    public static void main(String[] args) throws Exception {
        List<Map<String, String>> fileMate = getFileMate("group1","M00/98/73/CgMEwVh5M62AQnf-ABa36R1PUuY660.pdf");
        System.out.println(fileMate.toString());
    }
}