springboot jdk8下载resources下的文件

package com.gs.pvms.controller;

import com.gs.pvms.common.exception.BusinessServiceException;
import io.swagger.annotations.ApiOperation;
import org.springframework.core.io.ClassPathResource;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletResponse;
import java.io.*;

@Controller
@RequestMapping("download")
public class DownloadController {

    private static final String DIR = "downloads/";

    @GetMapping("/{name}")
    @ApiOperation("下载模板，地址：http://{XXX}/download/{filename}")
    public void download(@PathVariable String name, HttpServletResponse response) throws IOException {

        ClassPathResource resource = new ClassPathResource(DIR + name);
        response.setContentType("application/force-download");
        response.addHeader("Content-Disposition", "attachment;filename=" + name);
        byte[] bytes = new byte[1024];
        try (InputStream in = resource.getInputStream();
             BufferedInputStream bis = new BufferedInputStream(in)) {
            OutputStream outputStream = response.getOutputStream();
            int i = bis.read(bytes);
            while (i != -1) {
                outputStream.write(bytes, 0, i);
                i = bis.read(bytes);
            }
        } catch (FileNotFoundException e) {
            throw new BusinessServiceException("下载模板文档失败--》" + e.getMessage());
        } catch (IOException e) {
            throw new BusinessServiceException("下载模板文档失败--》" + e.getMessage());
        }
    }
}