2020-12-05springboot+layui简单的文件上传下载
上传Controller和页面
package com.kyz.dissertation_system.controller;
import com.kyz.dissertation_system.pojo.Student;
import com.kyz.dissertation_system.pojo.paper.Papers;
import com.kyz.dissertation_system.service.Impl.paper.PaperServiceImpl;
import com.kyz.dissertation_system.util.EnumMessage;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.subject.Subject;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;
@Slf4j
@Api(tags = "论文上传Controller",value = "paperUpload")
@Controller
@RequestMapping("paper")
public class PaperController {
@Autowired
HttpSession httpSession;
@Autowired
PaperServiceImpl paperService;
@ApiOperation(value = "学生word.docx文件上传")
@PostMapping("/upload")
@ResponseBody
public String PaperUpload(@RequestParam("file") MultipartFile file , HttpServletRequest request) throws IOException {
Subject subject = SecurityUtils.getSubject();
Student student = (Student) subject.getPrincipal();
Date date = new Date();
log.info(date.toString());
SimpleDateFormat dateformat = new SimpleDateFormat("yyyyMMddHHmmss");
String paperUUID = UUID.randomUUID().toString();
log.info(file.toString());
String pathString = null;
if(file!=null) {
pathString = "D:/paperCross/upload/" + paperUUID + "_" + dateformat.format(new Date()) + "_" +file.getOriginalFilename();
}
File files=new File(pathString);
log.info(pathString);
if(!files.getParentFile().exists()){
files.getParentFile().mkdirs();
}
file.transferTo(files);
Papers paper = new Papers(null,student.getStuAccount(),paperUUID,date,pathString,null);
paperService.commitPaperInfo(paper);
return EnumMessage.setMessage(pathString);
}
}
功能演示二 - 上传组件
上传我的论文
文件名
大小
状态
操作
下载Controller和页面
package com.kyz.dissertation_system.controller;
import com.kyz.dissertation_system.pojo.ApiResult;
import com.kyz.dissertation_system.pojo.Student;
import com.kyz.dissertation_system.pojo.Teacher;
import com.kyz.dissertation_system.pojo.paper.Papers;
import com.kyz.dissertation_system.service.Impl.TeacherServiceImpl;
import com.kyz.dissertation_system.service.Impl.paper.PaperServiceImpl;
import com.kyz.dissertation_system.util.ApiResultHandler;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.annotations.Param;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.subject.Subject;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.URLEncoder;
import java.util.List;
@Slf4j
@Api(tags = "教师Controller",value = "查看学生论文")
@Controller
@RequestMapping("/tch")
public class TeacherController {
@Autowired
TeacherServiceImpl teacherService;
@Autowired
PaperServiceImpl paperService;
@ApiOperation("跳转查看论文页面")
@GetMapping("/queryMyStudent")
public String queryMyStudent(){
return "home/teacher/queryStuPaper";
}
@ApiOperation("教师查看自己学生的论文")
@GetMapping("/queryMyStudentAndPaper")
@ResponseBody
public ApiResult queryMyStudentAndPaper(HttpServletRequest request){
int page = Integer.parseInt(request.getParameter("page"));
int limit =Integer.parseInt(request.getParameter("limit"));
Subject subject = SecurityUtils.getSubject();
Teacher teacher = (Teacher) subject.getPrincipal();
log.info("session teacher Account" + teacher.toString());
int pageCount = teacherService.queryMyStudentByMentorIdCount(teacher.getTchAccount());
List studentList = teacherService.queryMyStudentByMentorId(teacher.getTchAccount(),page,limit);
for (Student student : studentList) {
log.info(student.toString());
}
ApiResult data = ApiResultHandler.buildApiResult(0, "success", pageCount, studentList);
return data;
}
@ApiOperation("下载学生论文")
@RequestMapping("/toDownLoadPaper")
@ResponseBody
public String toDownLoadPaper(@Param("stuAccount")String stuAccount
, HttpServletRequest request
, HttpServletResponse response) throws IOException {
Papers paper = paperService.queryDownLoadPaper(stuAccount);
log.info(paper.toString());
// - id: 8
// - account: stu
// - uuid: 36bb573d-01b9-431d-9b4d-2e84cf84c2be
// - time: 2020-12-04 16:26:14
// - address: D:/paperCross/upload/36bb573d-01b9-431d-9b4d-2e84cf84c2be_20201205002613_基于GPU的光线追踪原理.docx
String path = paper.getPaperAddress();
String realPath ="D:/paperCross/upload/";
String fullname = path.substring(path.indexOf("_")-36);
response.reset();
response.setCharacterEncoding("UTF-8");
response.setContentType("application/msword");
//这种响应头写法是不正确的
//response.setHeader("Content-Disposition","attchment; filename:"+ URLEncoder.encode(fullname,"UTF-8"));
response.setHeader( "Content-Disposition", "attachment;filename=" + new String( fullname.getBytes("gb2312"), "ISO8859-1" ) );
log.info("path:"+realPath+"document name:"+fullname);
File file = new File(realPath,fullname);
InputStream inputStream = new FileInputStream(file);
OutputStream outputStream = response.getOutputStream();
byte[] buff = new byte[10485760];
int index = 0;
while ((index = inputStream.read(buff))!= -1)
{
outputStream.write(buff,0,index);
outputStream.flush();
}
outputStream.close();
inputStream.close();
return null;
}
}
学生信息 - 数据
搜索学生论文：