SpringBoot通用文件下载

package com.itheima.reggie.controller;

import com.itheima.reggie.common.R;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.UUID;

@RestController
@RequestMapping("common")
public class CommonController {

    @GetMapping("download")
    public void download(String name, HttpServletResponse httpServletResponse) {
        try {
            FileInputStream fileInputStream = new FileInputStream(new File(basePath + name));
            ServletOutputStream outputStream = httpServletResponse.getOutputStream();
            httpServletResponse.setContentType("application/octet-stream");
            httpServletResponse.setHeader("Content-Disposition", "attachment;filename="+文件名);
            int len = 0;
            byte[] bytes = new byte[1024];

            while ((len = fileInputStream.read(bytes)) != -1) {
                outputStream.write(bytes, 0, len);
            }
            fileInputStream.close();
            outputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }


    }

}