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本篇内容介绍了"java FastDFS文件下载到本地的方法"的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧!希望大家仔细阅读，能够学有所成!

package cn.bywin.cbvsp.controller;import cn.bywin.cbvsp.DAL.BO.po.clickhouse.BaseFrameCh;import cn.bywin.cbvsp.DAL.DAO.clickhouse.ClickHouseBaseDao;import com.github.tobato.fastdfs.domain.proto.storage.DownloadByteArray;import com.github.tobato.fastdfs.service.FastFileStorageClient;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Component;import org.springframework.web.bind.annotation.PostMapping;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;import javax.imageio.stream.FileImageOutputStream;import java.io.File;import java.util.HashSet;import java.util.List;/** * @author linbin * @create 2019-07-25 15:37 */@RestController@Component@RequestMapping("linbin")public class DownLoadController { @Autowired private ClickHouseBaseDao clickHouseBaseDao; @Autowired private FastFileStorageClient storageClient; @PostMapping("/download") public void test() { //查找这个时间段的所有摄像头 List strings1 = clickHouseBaseDao.selectByTime("select video_source_id from cbvsp.base_fragment where real_time between '2019-07-24 20:00:00' and '2019-07-24 20:10:00'"); HashSet s = new HashSet(); strings1.forEach(e->{ s.add(e); }); for (String s1 : s) { List strings = clickHouseBaseDao.selectByTime("select file_id from cbvsp.base_fragment where real_time between '2019-07-24 20:00:00' and '2019-07-24 20:10:00' and video_source_id='"+s1+"';"); buildFolder("/home/deploy/191-20to820-video/"+s1+""); strings.forEach(e -> { if(e.contains("35.26.59.199")){ return; } testHome(e,s1); }); } } public void testHome(String fileUrl,String dir) { String path = fileUrl.substring(32); int i = path.indexOf('/'); int i2 = path.indexOf("/", i + 1); int i3 = path.indexOf("/", i2 + 1); String ss = path.substring(i3 + 1); DownloadByteArray downloadByteArray = new DownloadByteArray(); byte[] bytes = storageClient.downloadFile("group1", path, downloadByteArray); byte2image(bytes, "/home/deploy/191-20to820-video/"+dir+"/" + ss); } //byte数组到图片到硬盘上 public void byte2image(byte[] data, String path) { if (data.length < 3 || path.equals("")) return;//判断输入的byte是否为空 try { FileImageOutputStream imageOutput = new FileImageOutputStream(new File(path));//打开输入流 imageOutput.write(data, 0, data.length);//将byte写入硬盘 imageOutput.close(); System.out.println("Make Picture success,Please find image in " + path); } catch (Exception ex) { System.out.println("Exception: " + ex); ex.printStackTrace(); } } public static String buildFolder(String path) { //读取目录路径 File file = new File(path); //推断是否存在 if (!file.exists() && !file.isDirectory()) { try { System.out.println("目录不存在!"); //生成目录 file.mkdir(); } catch (Exception e) { e.printStackTrace(); } } else { System.out.println("目录存在!"); } return path; }}"java FastDFS文件下载到本地的方法"的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识可以关注网站，小编将为大家输出更多高质量的实用文章!

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