POI实现Excel表格的导入导出

1、在pom.xml中添加Excel导入导出依赖

  
      org.apache.poi
      poi-ooxml
      3.14-beta1
  
  
      org.apache.poi
      poi-ooxml-schemas
      3.14-beta1
  
  
      org.apache.poi
      poi
      3.14-beta1
  
  
      org.apache.httpcomponents
      httpclient
      4.5.2
  
  

2、jsp使用

<%--导入--%>
导入用户
function openImportWin() {
    document.getElementById("ImportDiv").style.display = "block";
}

    

        关闭
        导入
        

            导入文件
            

                
            
        
    


<%--导出--%>
导出全部成绩
function exportAllGrade() {
    var CourseID = $("#ds_course").val();
    window.location.href = "/excel/allExports?CourseID="+CourseID;
}

2、controller

package com.graduation.controller;

import com.graduation.bean.Exercise;
import com.graduation.bean.ExerciseCheck;
import com.graduation.service.ExcelService;
import com.graduation.service.ExerciseService;
import com.graduation.service.UserService;
import com.graduation.util.CosineSimilarAlgorithm;
import com.graduation.util.ExcelUtil;
import com.graduation.util.WordRead;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
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 org.springframework.web.multipart.MultipartHttpServletRequest;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.ws.rs.core.Response;
import java.beans.IntrospectionException;
import java.io.*;
import java.lang.reflect.InvocationTargetException;
import java.text.DecimalFormat;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Excel控制器
 * Created by ASUS on 2018/5/20
 *
 * @Authod K
 */

@Controller
@RequestMapping("/excel")
public class ExcelController {

    @Autowired
    private ExcelService excelService;

    @Autowired
    private UserService userService;

    @Autowired
    private ExerciseService exerciseService;

    @ResponseBody
    @RequestMapping("/exports")
    public void export(@RequestParam(value = "CourseID",required = true)String CourseID,@RequestParam(value = "ChapterID",required = true) String ChapterID,@RequestParam(value = "MinChapterID",required = true) String MinChapterID,HttpServletRequest request, HttpServletResponse response) throws ClassNotFoundException, IntrospectionException, IllegalAccessException, ParseException, InvocationTargetException {
        System.out.println(CourseID);
        System.out.println("excel导出开始");
        String salaryDate="1";
        System.out.println("list:"+salaryDate);
        if(salaryDate!=""){
            response.reset(); //清除buffer缓存
            Map map=new HashMap();
            System.out.println("文件名：");
            // 指定下载的文件名
            response.setHeader("Content-Disposition", "attachment;filename=GradeList.xlsx");
            response.setContentType("application/vnd.ms-excel;charset=UTF-8");
            response.setHeader("Pragma", "no-cache");
            response.setHeader("Cache-Control", "no-cache");
            response.setDateHeader("Expires", 0);
            XSSFWorkbook workbook=null;
            //导出Excel对象
            workbook = excelService.exportExcelInfo(salaryDate,CourseID,ChapterID,MinChapterID);
            System.out.println(workbook);
            OutputStream output;
            try {
                System.out.println("创建成功！");
                output = response.getOutputStream();
                BufferedOutputStream bufferedOutPut = new BufferedOutputStream(output);
                bufferedOutPut.flush();
                workbook.write(output);
                bufferedOutPut.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    @ResponseBody
    @RequestMapping("/allExports")
    public void allExports(@RequestParam(value = "CourseID",required = true)String CourseID,HttpServletRequest request, HttpServletResponse response) throws ClassNotFoundException, IntrospectionException, IllegalAccessException, ParseException, InvocationTargetException {
        System.out.println(CourseID);
        System.out.println("excel导出开始");
        String salaryDate="1";
        System.out.println("list:"+salaryDate);
        if(salaryDate!=""){
            response.reset(); //清除buffer缓存
            Map map=new HashMap();
            System.out.println("文件名：");
            // 指定下载的文件名
            response.setHeader("Content-Disposition", "attachment;filename=GradeList.xlsx");
            response.setContentType("application/vnd.ms-excel;charset=UTF-8");
            response.setHeader("Pragma", "no-cache");
            response.setHeader("Cache-Control", "no-cache");
            response.setDateHeader("Expires", 0);
            XSSFWorkbook workbook=null;
            //导出Excel对象
            workbook = excelService.exportAllExcelInfo(salaryDate,CourseID);
            System.out.println(workbook);
            OutputStream output;
            try {
                System.out.println("创建成功！");
                output = response.getOutputStream();
                BufferedOutputStream bufferedOutPut = new BufferedOutputStream(output);
                bufferedOutPut.flush();
                workbook.write(output);
                bufferedOutPut.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
   
    @ResponseBody
    @RequestMapping("/ExcelImport")
    public  void  ajaxUploadExcel(HttpServletRequest request,HttpServletResponse response) throws Exception {
        MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
        InputStream in =null;
        List> listob = null;
        MultipartFile file = multipartRequest.getFile("upfile");
        if(file.isEmpty()){
            throw new Exception("文件不存在！");
        }
        in = file.getInputStream();
        listob = new ExcelUtil().getBankListByExcel(in,file.getOriginalFilename());
        //该处可调用service相应方法进行数据保存到数据库中，现只对数据输出
        for (int i = 0; i < listob.size(); i++) {
            List