SpringMVC实现文件下载

下载控制器

package com.leo.controller;

import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * @ClassName: DownloadController
 * @Author: Leo
 * @Description:
 * @Date: 2019/5/29 15:57
 */
@Controller
public class DownloadController {
    @RequestMapping(value = "/DownLoad/{fileName}/{fileType}", method = RequestMethod.GET)
    public ResponseEntity<byte[]> download(HttpServletRequest request, @PathVariable String fileName, @PathVariable String fileType) throws IOException {
        File file = new File("D:\\Apks\\" + fileName + "." + fileType);
        byte[] body = null;
        InputStream is = new FileInputStream(file);
        body = new byte[is.available()];
        is.read(body);
        HttpHeaders headers = new HttpHeaders();
        headers.add("Content-Disposition", "attchement;filename=" + file.getName());
        HttpStatus statusCode = HttpStatus.OK;
        ResponseEntity<byte[]> entity = new ResponseEntity<>(body, headers, statusCode);
        return entity;
    }
}

使用方法

localhost:8080/部署的war包名/DownLoad/fileName/fileType