Java项目：36 springboot图书个性化推荐系统的设计与实现003
package com.controller;
import com.annotation.IgnoreAuth;
import com.baomidou.mybatisplus.mapper.EntityWrapper;
import com.entity.ConfigEntity;
import com.entity.EIException;
import com.service.ConfigService;
import com.utils.R;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.util.Date;
/**
* 上传文件映射表
*/
@RestController
@RequestMapping("file")
@SuppressWarnings({"unchecked","rawtypes"})
public class FileController{
@Autowired
private ConfigService configService;
/**
* 上传文件
*/
@RequestMapping("/upload")
public R upload(@RequestParam("file") MultipartFile file, String type, HttpServletRequest request) throws Exception {
if (file.isEmpty()) {
throw new EIException("上传文件不能为空");
}
String fileExt = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".")+1);
String fileName = new Date().getTime()+"."+fileExt;
File dest = new File(request.getSession().getServletContext().getRealPath("/upload")+"/"+fileName);
file.transferTo(dest);
if(StringUtils.isNotBlank(type) && type.equals("1")) {
ConfigEntity configEntity = configService.selectOne(new EntityWrapper<ConfigEntity>().eq("name", "faceFile"));
if(configEntity==null) {
configEntity = new ConfigEntity();
configEntity.setName("faceFile");
configEntity.setValue(fileName);
} else {
configEntity.setValue(fileName);
}
configService.insertOrUpdate(configEntity);
}
return R.ok().put("file", fileName);
}
/**
* 下载文件
*/
@IgnoreAuth
@RequestMapping("/download")
public void download(@RequestParam String fileName, HttpServletRequest request, HttpServletResponse response) {
try {
File file = new File(request.getSession().getServletContext().getRealPath("/upload")+"/"+fileName);
if (file.exists()) {
response.reset();
response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName+"\"");
response.setHeader("Cache-Control", "no-cache");
response.setHeader("Access-Control-Allow-Credentials", "true");
response.setContentType("application/octet-stream; charset=UTF-8");
IOUtils.write(FileUtils.readFileToByteArray(file), response.getOutputStream());
}
} catch (IOException e) {
e.printStackTrace();
}
}
}