FastDFS文件操作-java

未安装fastdfs先安装：FastDFS安装配置(CentOS7)，接下来写个测试demo。

创建demo项目

1、pom.xml引入依赖

	<!-- fastDFS依赖就一个 -->
	<dependencies>
		<dependency>
			<groupId>net.oschina.zcx7878</groupId>
			<artifactId>fastdfs-client-java</artifactId>
			<version>1.27.0.0</version>
		</dependency>
	</dependencies>

 2、配置文件

fdfs_client.conf

connect_timeout = 2
network_timeout = 30
charSet = UTF-8
http.tracker_http_port = 80
http.anti_steal_token = no
http.secret_key = FastDFS1234567890
tracker_server = 192.168.1.104:22122

3、代码

（1）FastDfsUtil.java工具类(仅供参考)

package com.fdfs.demo;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

import org.csource.common.MyException;
import org.csource.fastdfs.ClientGlobal;
import org.csource.fastdfs.FileInfo;
import org.csource.fastdfs.StorageClient;
import org.csource.fastdfs.StorageServer;
import org.csource.fastdfs.TrackerClient;
import org.csource.fastdfs.TrackerServer;

/**
 * 
* @ClassName: FastDfsUtil 
* @Description: FastDfs文件管理简单工具类
* @author zhoujie 
* @date 2018年11月27日 下午6:10:16 
* @version V1.0
 */
public class FastDfsUtil {
	
	private static TrackerClient trackerClient = null;
	private static TrackerServer trackerServer = null;
	private static StorageServer storageServer = null;
	private static StorageClient storageClient = null;

	static {
		try {
			ClientGlobal.init("fdfs_client.conf");
			trackerClient = new TrackerClient();
			trackerServer = trackerClient.getConnection();
			storageClient = new StorageClient(trackerServer, storageServer);
		} catch (IOException | MyException e) {
			throw new RuntimeException("FastDfs工具类初始化失败!");
		}
	}
	
	/**
	 * 
	* @Title: fdfsUpload 
	* @Description: 通过文件流上传文件
	* @param @param inputStream 文件流
	* @param @param filename 文件名称
	* @param @return
	* @param @throws IOException
	* @param @throws MyException 
	* @return String 返回文件在FastDfs的存储路径   
	* @throws
	 */
	public static String fdfsUpload(InputStream inputStream, String filename) throws IOException, MyException{
		String suffix = ""; //后缀名
		try{
			suffix = filename.substring(filename.lastIndexOf(".")+1);
		}catch (Exception e) {
			throw new RuntimeException("参数filename不正确!格式例如：a.png");
		}
		String savepath = ""; //FastDfs的存储路径   
		ByteArrayOutputStream swapStream = new ByteArrayOutputStream();  
	    byte[] buff = new byte[1024];  
		int len = 0;  
		while ((len = inputStream.read(buff)) != -1) {  
			swapStream.write(buff, 0, len);  
		}
		byte[] in2b = swapStream.toByteArray();  
		String[] strings = storageClient.upload_file(in2b, suffix, null); //上传文件
		for (String str : strings) {
			savepath += "/" + str; //拼接路径
		}
		return savepath;
	}
	
	/**
	 * 
	* @Title: fdfsUpload 
	* @Description: 本地文件上传
	* @param @param filepath 本地文件路径
	* @param @return
	* @param @throws IOException
	* @param @throws MyException    
	* @return String 返回文件在FastDfs的存储路径   
	* @throws
	 */
	public static String fdfsUpload(String filepath) throws IOException, MyException{
		String suffix = ""; //后缀名
		try{
			suffix = filepath.substring(filepath.lastIndexOf(".")+1);
		}catch (Exception e) {
			throw new RuntimeException("上传的不是文件!");
		}
		String savepath = ""; //FastDfs的存储路径   
		String[] strings = storageClient.upload_file(filepath, suffix, null); //上传文件
		for (String str : strings) {
			savepath += "/" + str; //拼接路径
		}
		return savepath;
	}
	
	/**
	 * 
	* @Title: fdfsDownload 
	* @Description: 下载文件到目录
	* @param @param savepath 文件存储路径
	* @param @param localPath 下载目录
	* @param @return
	* @param @throws IOException
	* @param @throws MyException    
	* @return boolean 返回是否下载成功
	* @throws
	 */
	public static boolean fdfsDownload(String savepath, String localPath) throws IOException, MyException{
		String group = ""; //存储组
		String path = ""; //存储路径
		try{
			int secondindex = savepath.indexOf("/", 2); //第二个"/"索引位置
			group = savepath.substring(1, secondindex); //类似：group1
			path = savepath.substring(secondindex + 1); //类似：M00/00/00/wKgBaFv9Ad-Abep_AAUtbU7xcws013.png
		}catch (Exception e) {
			throw new RuntimeException("传入文件存储路径不正确!格式例如：/group1/M00/00/00/wKgBaFv9Ad-Abep_AAUtbU7xcws013.png");
		}
		int result = storageClient.download_file(group, path, localPath);
		if(result != 0){
			throw new RuntimeException("下载文件失败：文件路径不对或者文件已删除!");
		}
		return true;
	}
	
	/**
	 * 
	* @Title: fdfsDownload 
	* @Description: 返回文件字符数组
	* @param @param savepath 文件存储路径
	* @param @return
	* @param @throws IOException
	* @param @throws MyException    
	* @return byte[] 字符数组
	* @throws
	 */
	public static byte[] fdfsDownload(String savepath) throws IOException, MyException{
		byte[] bs = null;
		String group = ""; //存储组
		String path = ""; //存储路径
		try{
			int secondindex = savepath.indexOf("/", 2); //第二个"/"索引位置
			group = savepath.substring(1, secondindex); //类似：group1
			path = savepath.substring(secondindex + 1); //类似：M00/00/00/wKgBaFv9Ad-Abep_AAUtbU7xcws013.png
		}catch (Exception e) {
			throw new RuntimeException("传入文件存储路径不正确!格式例如：/group1/M00/00/00/wKgBaFv9Ad-Abep_AAUtbU7xcws013.png");
		}
		bs = storageClient.download_file(group, path); //返回byte数组
		return bs;
	}
	
	/**
	 * 
	* @Title: fdfsDeleteFile 
	* @Description: 删除文件
	* @param @param savepath 文件存储路径
	* @param @return
	* @param @throws IOException
	* @param @throws MyException    
	* @return boolean 返回true表示删除成功   
	* @throws
	 */
	public static boolean fdfsDeleteFile(String savepath) throws IOException, MyException{
		String group = ""; //存储组
		String path = ""; //存储路径
		try{
			int secondindex = savepath.indexOf("/", 2); //第二个"/"索引位置
			group = savepath.substring(1, secondindex); //类似：group1
			path = savepath.substring(secondindex + 1); //类似：M00/00/00/wKgBaFv9Ad-Abep_AAUtbU7xcws013.png
		}catch (Exception e) {
			throw new RuntimeException("传入文件存储路径不正确!格式例如：/group1/M00/00/00/wKgBaFv9Ad-Abep_AAUtbU7xcws013.png");
		}
		int result = storageClient.delete_file(group, path); //删除文件，0表示删除成功
		if(result != 0){
			throw new RuntimeException("删除文件失败：文件路径不对或者文件已删除!");
		}
		return true;
	}
	
	/**
	 * 
	* @Title: fdfdFileInfo 
	* @Description: 返回文件信息
	* @param @param savepath 文件存储路径
	* @param @return
	* @param @throws IOException
	* @param @throws MyException    
	* @return FileInfo 文件信息
	* @throws
	 */
	public static FileInfo fdfdFileInfo(String savepath) throws IOException, MyException{
		String group = ""; //存储组
		String path = ""; //存储路径
		try{
			int secondindex = savepath.indexOf("/", 2); //第二个"/"索引位置
			group = savepath.substring(1, secondindex); //类似：group1
			path = savepath.substring(secondindex + 1); //类似：M00/00/00/wKgBaFv9Ad-Abep_AAUtbU7xcws013.png
		}catch (Exception e) {
			throw new RuntimeException("传入文件存储路径不正确!格式例如：/group1/M00/00/00/wKgBaFv9Ad-Abep_AAUtbU7xcws013.png");
		}
		FileInfo fileInfo = storageClient.get_file_info(group, path);
		return fileInfo;
	}
	
}

（2）Test.java测试

package com.fdfs.demo;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

import org.csource.common.MyException;

public class Test {

	public static void main(String[] args) {
		
		try {
			System.out.println("存储路径："+FastDfsUtil.fdfsUpload("F:/图片/02.jpg")); //上传文件。。。注意路径
			//System.out.println(FastDfsUtil.fdfdFileInfo("/group1/M00/00/00/wKgBaFv9HJeAMaseAAIWRj8eKZQ103.jpg").toString()); //文件信息
			//System.out.println(FastDfsUtil.fdfsDeleteFile("/group1/M00/00/00/wKgBaFv9HJeAMaseAAIWRj8eKZQ103.jpg")); //删除文件
			//System.out.println(FastDfsUtil.fdfsUpload(new FileInputStream(new File("F:/图片/02.jpg")), "02.jpg"));//通过文件流上传文件
			//System.out.println(FastDfsUtil.fdfsDownload("/group1/M00/00/00/wKgBaFv9acaANK2oAAIWRj8eKZQ339.jpg").length); //获取文件byte[]
			//System.out.println(FastDfsUtil.fdfsDownload("/group1/M00/00/00/wKgBaFv9acaANK2oAAIWRj8eKZQ339.jpg", "D:/logs")); //下载文件到本地(拒绝访问)
		} catch (IOException | MyException e) {
			e.printStackTrace();
		}
		
	}
	
}

ok!

效果：

可以直接浏览器预览

http://192.168.1.104/group1/M00/00/00/wKgBaFwXZd2ALGUxAAIWRj8eKZQ220.jpg

ojbk，！！！

demo下载

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原文地址：https://www.cnblogs.com/qq1995/p/10358972.html