coding++：java操作 FastDFS（上传 | 下载 | 删除）

灰太狼 2021-11-16 05:58 216阅读 0赞

**开发工具  IDEAL2017  Springboot 1.5.21.RELEASE**

**-------------------------------------------------------------------------------------**

**1、所需要的JAR文件**

<dependency>
 <groupId>commons-io</groupId>
 <artifactId>commons-io</artifactId>
 <version>2.2</version>
 </dependency>
 <dependency>
 <groupId>commons-fileupload</groupId>
 <artifactId>commons-fileupload</artifactId>
 <version>1.3.1</version>
 </dependency>
 
 <dependency>
 <groupId>org.csource</groupId>
 <artifactId>fastdfs-client-java</artifactId>
 <version>1.27-SNAPSHOT</version>
 </dependency>

**2、fastdfs.properties 属性设置**

#FastDFS配置begin-----------除了fastdfs.tracker_servers，其它配置项都是可选的 fastdfs.connect_timeout_in_seconds=5 fastdfs.network_timeout_in_seconds=30 fastdfs.charset=UTF-8 fastdfs.http_anti_steal_token=false fastdfs.http_secret_key=FastDFS1234567890 fastdfs.http_tracker_http_port=80 fastdfs.tracker_servers=IP:22122 #FastDFS配置end-----------

**3、操作工具类**

package cn.com.soundrecording.utils; import org.csource.common.NameValuePair; import org.csource.fastdfs.*; public class FastDFSClient { private TrackerClient trackerClient = null; private TrackerServer trackerServer = null; private StorageServer storageServer = null; private StorageClient1 storageClient = null; public FastDFSClient(String conf) throws Exception { if (conf.contains("classpath:")) { conf = conf.replace("classpath:", this.getClass().getResource("/").getPath()); } ClientGlobal.initByProperties(conf); trackerClient = new TrackerClient(); trackerServer = trackerClient.getConnection(); storageServer = null; storageClient = new StorageClient1(trackerServer, storageServer); } /** * 上传文件方法 * Title: uploadFile * Description: * * @param fileName 文件全路径 * @param extName 文件扩展名，不包含（.） * @param metas 文件扩展信息 * @return * @throws Exception */
 public String uploadFile(String fileName, String extName, NameValuePair[] metas) throws Exception { String result = storageClient.upload_file1(fileName, extName, metas); return result; } public String uploadFile(String fileName) throws Exception { return uploadFile(fileName, null, null); } public String uploadFile(String fileName, String extName) throws Exception { return uploadFile(fileName, extName, null); } /** * 上传文件方法 * Title: uploadFile * Description: * * @param fileContent 文件的内容，字节数组 * @param extName 文件扩展名 * @param metas 文件扩展信息 * @return * @throws Exception */
 public String uploadFile(byte[] fileContent, String extName, NameValuePair[] metas) throws Exception { String result = storageClient.upload_file1(fileContent, extName, metas); return result; } public String uploadFile(byte[] fileContent) throws Exception { return uploadFile(fileContent, null, null); } public String uploadFile(byte[] fileContent, String extName) throws Exception { return uploadFile(fileContent, extName, null); } /** * 下载文件方法 * Title: uploadFile * Description: * * @param groupName 分组 * @param remoteFileName 文件全路径名称 * @return * @throws Exception */
 public byte[] download(String groupName,String remoteFileName)throws Exception{ return storageClient.download_file(groupName, remoteFileName); } /** * 删除文件方法 * Title: uploadFile * Description: * * @param groupName 分组 * @param remoteFileName 文件全路径名称 * @return * @throws Exception */
 public Integer delete(String groupName,String remoteFileName)throws Exception{ int i = storageClient.delete_file(groupName, remoteFileName); return i; } }

**4、调用操作 后台代码**

package cn.com.soundrecording.controller; import cn.com.soundrecording.utils.FastDFSClient; import com.sun.net.httpserver.HttpContext; import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.apache.commons.io.IOUtils; import org.springframework.web.bind.annotation.*; import org.springframework.web.multipart.MultipartFile; import org.springframework.web.multipart.MultipartHttpServletRequest; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.*; import java.net.URLEncoder; import java.util.List; @RestController public class UploedController { private final String URL = "http://wlkjs.cn/"; //上传到服务器
        @PostMapping("/upload") @ResponseBody public String uploed(MultipartFile multipartFile, HttpServletRequest request) throws Exception { //文件类型
            boolean isMultipart = ServletFileUpload.isMultipartContent(request); //02、上传到服务器
            FastDFSClient dfsClient = new FastDFSClient("config/fastdfs.properties"); String url = dfsClient.uploadFile(multipartFile.getBytes(), request.getParameter("type")); System.out.println(url); return URL + url; } //从服务器下载
        @GetMapping("/download") public void download(String fileName, HttpServletResponse response) throws Exception { String name, groupName, remoteFileName; //初始化连接
            FastDFSClient dfsClient = new FastDFSClient("config/fastdfs.properties"); //获取 group1 名称
            groupName = fileName.substring(fileName.indexOf("group1"), fileName.indexOf("/M00")); //获取 文件全路径 M00..xxxxx
            remoteFileName = fileName.substring(fileName.indexOf("M00")); name = fileName.substring(fileName.lastIndexOf("/")); //执行下载
            byte[] content = dfsClient.download(groupName, remoteFileName); //响应到客户端下载
            response.setContentType("application/ms-mp3;charset=UTF-8"); response.setHeader("Content-Disposition", "attachment;filename=" .concat(String.valueOf(URLEncoder.encode(name, "UTF-8")))); OutputStream out = response.getOutputStream(); out.write(content); out.flush(); out.close(); } //从服务器删除
        @PostMapping("/delete") public Object delete(String fileName) throws Exception { String groupName, remoteFileName; //获取 group1 名称
            groupName = fileName.substring(fileName.indexOf("group1"), fileName.indexOf("/M00")); //获取 文件全路径 M00..xxxxx
            remoteFileName = fileName.substring(fileName.indexOf("M00")); //执行删除
            FastDFSClient dfsClient = new FastDFSClient("config/fastdfs.properties"); //返回 0 代表成功
            int i = dfsClient.delete(groupName, remoteFileName); System.out.println(i == 0 ? "删除成功" : "删除失败:" + i); return i; } }

转载于:https://www.cnblogs.com/codingmode/p/11133320.html