gitProject/src/src/main/java/com/xin/lcyxjy/controller/FileController.java

package com.xin.lcyxjy.controller;

import cn.hutool.core.io.FileUtil;
import cn.hutool.core.util.StrUtil;

import com.xin.lcyxjy.common.Result;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.util.List;

@RestController
@RequestMapping("/files")
public class FileController {
    private static final String filePath = System.getProperty("user.dir") + "/files/";
    @Value("9999")
    private String port;
    @Value("localhost")
    private String ip;
    /**
     * 单文件上传
     *
     * @param file
     * @return
     */
    @PostMapping("/upload")
    public Result upload(MultipartFile file) throws InterruptedException {
        String flag;
        synchronized (FileController.class) {
            String filePath = System.getProperty("user.dir") + "/src/main/resources/static/file/";
            flag = System.currentTimeMillis() + "";
            Thread.sleep(1L);
        }
        Thread.sleep(1000);
            String fileName = file.getOriginalFilename();
            try {
                if(!FileUtil.isDirectory(filePath)) {
                    FileUtil.mkdir(filePath);
                }

                FileUtil.writeBytes(file.getBytes(), filePath + flag + "-" + fileName);
                System.out.println(fileName + "--上传成功");

            } catch (Exception e) {
                System.err.println(fileName + "--文件上传失败");
            }
            String http="http://"+ip+":"+port+"/files/";
            return Result.success(http+flag+"-"+fileName);
        }



    /**
     * 获取文件
     *
     * @param flag
     * @param response
     */
    @GetMapping("/{flag}")
    public void avatarPath(@PathVariable String flag, HttpServletResponse response)
    {
        if(!FileUtil.isDirectory(filePath)) {
            FileUtil.mkdir(filePath);
        }
        OutputStream os;

      //  String basePath = System.getProperty("user.dir") + "/src/main/resources/static/file/";
         try {
            if (StrUtil.isNotEmpty(flag)) {
                response.addHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(flag, "UTF-8"));
                response.setContentType("application/octet-stream");
                byte[] bytes = FileUtil.readBytes(filePath + flag);
                os = response.getOutputStream();
                os.write(bytes);
                os.flush();
                os.close();
            }
        } catch (Exception e) {
            System.out.println("文件下载失败");
        }
    }

    /**
     * 删除文件
     *
     * @param flag
     */
    @DeleteMapping("/{flag}")
    public void delFile(@PathVariable String flag) {
        List<String> fileNames = FileUtil.listFileNames(filePath);
        if(!FileUtil.isDirectory(filePath)) {
            FileUtil.mkdir(filePath);
        }
        String filename = fileNames.stream().filter(name -> name.contains(flag)).findAny().orElse("");
        FileUtil.del(filePath + filename);
        System.out.println("删除文件" + filename + "成功");
    }

}