Java操作FastDFS

Maven：

<dependency>
    <groupId>cn.bestwu</groupId>
    <artifactId>fastdfs-client-java</artifactId>
    <version>1.27</version>
</dependency>
<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>2.4</version>
</dependency>

实现逻辑：

public class FastDFS<T> {
    private static StorageClient storageClient;
    static {
        String fdfsConfPath="";
        if(PropertiesUtil.class.getClassLoader().getResource("fdfs_client.conf")!=null){
            fdfsConfPath = PropertiesUtil.class.getClassLoader().getResource("fdfs_client.conf").getFile();
        }
        try {
            //使用全局方法加载配置文件
            ClientGlobal.init(fdfsConfPath);
            //创建一个TrackerClient对象
            TrackerClient tracker = new TrackerClient();
            //通过TrackerClient对象获得TrackerServer对象
            TrackerServer trackerServer = tracker.getConnection();
            //创建StorageServer的引用，null就可以了
            StorageServer storageServer = null;
            //创建一个StorageClient对象，其需要两个参数（TrackerServer 和 StorageServer），通过storageClient来进行操作
            storageClient = new StorageClient(trackerServer, storageServer);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    /**
     * 根据URL 或 byte[]上传图片
     * @param url 本地图片地址"D:\\stsworkspace\\sprites.png";
     * @param ext 本地图片后缀名"png"
     * @param nvp 自定义元数据
     * @return 可访问路径 
     */
    public String updateByUrl(T url,String ext,NameValuePair nvp []) {
        StringBuffer sb = new StringBuffer("http://192.168.42.128:84/");
        try {
            String[] strings = null;
            if(url instanceof String) {
                strings = storageClient.upload_file((String)url, ext, nvp);
            }else if(url instanceof byte[]) {
                strings = storageClient.upload_file((byte[])url, ext, nvp);
            }
            for(String str : strings) {
                sb.append(str);
                sb.append("/");
            }
            sb.deleteCharAt(sb.length()-1);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return sb.toString();
    }
    /**
     * 下载图片 http://192.168.42.128:84/group1/M00/BC/B7/wKgqgls3YFCAW77-AAFY1Aipxfo426.jpg
     * @param group 组名 group1
     * @param url 路径 M00/BC/B7/wKgqgls3YFCAW77-AAFY1Aipxfo426
     * @param ext 类型 jpg
     */
    public void downByUrl(String group,String url,String ext) {
        try {
            byte[] b = storageClient.download_file(group, url+"."+ext);
            System.out.println(b);
            IOUtils.write(b, new FileOutputStream("C:/Users/Luke/Desktop/"+UUID.randomUUID().toString()+".jpg"));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    /**
     * 获取文件信息 http://192.168.42.128:84/group1/M00/BC/B7/wKgqgls3YFCAW77-AAFY1Aipxfo426.jpg
     * @param group 组名 group1
     * @param url 路径 M00/BC/B7/wKgqgls3YFCAW77-AAFY1Aipxfo426
     * @param ext 类型 jpg
     */
    public void getFileInfo(String group,String url,String ext) {
        try {
            FileInfo fi = storageClient.get_file_info(group, url+"."+ext);
            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();
        }
    }
    /**
     * 获取文件元数据
     * @param group 组名 group1
     * @param url 路径 M00/BC/B7/wKgqgls3YFCAW77-AAFY1Aipxfo426
     * @param ext 类型 jpg
     */
    public void getFileMate(String group,String url,String ext) {
        try {
            NameValuePair nvps[] = storageClient.get_metadata(group, url+"."+ext);
            for(NameValuePair nvp : nvps) {
                System.out.println(nvp.getName() + ":" + nvp.getValue());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    /**
     * 删除文件
     * @param group 组名 group1
     * @param url 路径 M00/BC/B7/wKgqgls3YFCAW77-AAFY1Aipxfo426
     * @param ext 类型 jpg
     */
    public void deleteFile(String group,String url,String ext) {
        try {
            int i = storageClient.delete_file(group, url+"."+ext);
            System.out.println(i==0?"删除成功":"删除失败:"+i);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

调用逻辑：

public class ATest {
    /*
     * 根据URL获取
     */
    //@Test
    public void t1() {
        FastDFS fd = new FastDFS();
        //自定义元数据
        NameValuePair nvp [] = new NameValuePair[]{ 
                new NameValuePair("age", "18"), 
                new NameValuePair("sex", "male") 
        }; 
        String url = fd.updateByUrl("D:\\06.jpg","jpg",nvp);
        System.out.println(url);
    }
    /*
     * 根据Byte获取
     */
    //@Test
    public void t2() {
        FastDFS fd = new FastDFS();
        //自定义元数据
        NameValuePair nvp [] = new NameValuePair[]{ 
                new NameValuePair("age", "18"), 
                new NameValuePair("sex", "male") 
        }; 
        byte[] b = image2byte("D:\\05.jpg");
        String url = fd.updateByUrl(b,"jpg",nvp);
        System.out.println(url);
    }
    /*
     * 下载文件
     */
    //@Test
    public void t3() {
        FastDFS fd = new FastDFS();
        fd.downByUrl("group1", "M00/37/AF/wKgqgVs3tf-AKjYgAAFY1Aipxfo761","jpg");
    }
    /*
     * 获取文件信息
     */
    //@Test
    public void t4() {
        FastDFS fd = new FastDFS();
        fd.getFileInfo("group1", "M00/37/AF/wKgqgVs3tf-AKjYgAAFY1Aipxfo761","jpg");
    }
    /*
     * 获取文件元数据
     */
    //@Test
    public void t5() {
        FastDFS fd = new FastDFS();
        fd.getFileMate("group1", "M00/37/AF/wKgqgVs3tf-AKjYgAAFY1Aipxfo761","jpg");
    }
    /*
     * 删除文件
     */
    @Test
    public void t6() {
        FastDFS fd = new FastDFS();
        fd.deleteFile("group1", "M00/37/AF/wKgqgVs3tf-AKjYgAAFY1Aipxfo761","jpg");
    }
    /*
     * 图片到byte数组
     */
    public static byte[] image2byte(String path){
        byte[] data = null;
        FileImageInputStream input = null;
        try {
            input = new FileImageInputStream(new File(path));
            ByteArrayOutputStream output = new ByteArrayOutputStream();
            byte[] buf = new byte[1024];
            int numBytesRead = 0;
            while ((numBytesRead = input.read(buf)) != -1) {
                output.write(buf, 0, numBytesRead);
            }
            data = output.toByteArray();
            output.close();
            input.close();
        }
        catch (Exception ex1) {
            ex1.printStackTrace();
        }
        return data;
    }
}