java导入导出Excel(ajax和from提交)

d1:创建一个工具类ImportExcelUtil

依赖maven坐标

  
            org.apache.poi
            poi-ooxml
            3.9
   

代码片.

package com.it.utils;

import java.io.IOException;
import java.io.InputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;



public class ImportExcelUtil {

    private final static String excel2003L =".xls";    //2003- 版本的excel
    private final static String excel2007U =".xlsx";   //2007+ 版本的excel

    /**
     * 描述：获取IO流中的数据，组装成List>对象
     * @param in,fileName
     * @return
     * @throws IOException
     */
    public  List<List<Object>> getBankListByExcel(InputStream in,String fileName) throws Exception{
        List<List<Object>> list = null;

        //创建Excel工作薄
        Workbook work = this.getWorkbook(in,fileName);
        if(null == work){
            throw new Exception("创建Excel工作薄为空！");
        }
        Sheet sheet = null;
        Row row = null;
        Cell cell = null;

        list = new ArrayList<List<Object>>();
        //遍历Excel中所有的sheet
        for (int i = 0; i < work.getNumberOfSheets(); i++) {
            sheet = work.getSheetAt(i);
            if(sheet==null){continue;}

            //遍历当前sheet中的所有行
            for (int j = sheet.getFirstRowNum(); j < sheet.getLastRowNum()+1; j++) {
                row = sheet.getRow(j);
                if(row==null||row.getFirstCellNum()==j){continue;}

                //遍历所有的列
                List<Object> li = new ArrayList<Object>();
                for (int y = row.getFirstCellNum(); y < row.getLastCellNum(); y++) {
                    cell = row.getCell(y);
                    li.add(this.getCellValue(cell));
                }
                list.add(li);
            }
        }
        in.close();
        return list;
    }

    /**
     * 描述：根据文件后缀，自适应上传文件的版本
     * @param inStr,fileName
     * @return
     * @throws Exception
     */
    public  Workbook getWorkbook(InputStream inStr,String fileName) throws Exception{
        Workbook wb = null;
        String fileType = fileName.substring(fileName.lastIndexOf("."));
        if(excel2003L.equals(fileType)){
            wb = new HSSFWorkbook(inStr);  //2003-
        }else if(excel2007U.equals(fileType)){
            wb = new XSSFWorkbook(inStr);  //2007+
        }else{
            throw new Exception("解析的文件格式有误！");
        }
        return wb;
    }

    /**
     * 描述：对表格中数值进行格式化
     * @param cell
     * @return
     */
    public  Object getCellValue(Cell cell){
        Object value = null;
        DecimalFormat df = new DecimalFormat("0");  //格式化number String字符
        SimpleDateFormat sdf = new SimpleDateFormat("yyy-MM-dd");  //日期格式化
        DecimalFormat df2 = new DecimalFormat("0.00");  //格式化数字

        switch (cell.getCellType()) {
            case Cell.CELL_TYPE_STRING:
                value = cell.getRichStringCellValue().getString();
                break;
            case Cell.CELL_TYPE_NUMERIC:
                if("General".equals(cell.getCellStyle().getDataFormatString())){
                    value = df.format(cell.getNumericCellValue());
                }else if("m/d/yy".equals(cell.getCellStyle().getDataFormatString())){
                    value = sdf.format(cell.getDateCellValue());
                }else{
                    value = df2.format(cell.getNumericCellValue());
                }
                break;
            case Cell.CELL_TYPE_BOOLEAN:
                value = cell.getBooleanCellValue();
                break;
            case Cell.CELL_TYPE_BLANK:
                value = "";
                break;
            default:
                break;
        }
        return value;
    }
}

d2:创建一个LeadingExcelController从界面接收Excel文件

代码片.

package com.it.ui.controller;

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.it.entity.Books;
import com.it.service.BooksService;
import com.it.utils.ImportExcelUtil;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFSheet;
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.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;



@Controller
@RequestMapping("/uploadExcel")
public class LeadingExcelController {

    @Autowired
    private BooksService service=null;

    @RequestMapping("/form")
    public String form(HttpServletRequest request)throws Exception{
        MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;

        InputStream in =null;
        List<List<Object>> listob = null;
        MultipartFile file = multipartRequest.getFile("upfile");

        if(file.isEmpty()){
            throw new Exception("文件不存在！");
        }
        in = file.getInputStream();
        listob = new ImportExcelUtil().getBankListByExcel(in,file.getOriginalFilename());
        in.close();
        System.out.println(listob.size());
        //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<Object> lo = listob.get(i);
            Books Books = new Books();
            Books.setBookname(String.valueOf(lo.get(1)));
            Books.setBookAuthor(String.valueOf(lo.get(2)));
            Books.setBookPublish(String.valueOf(lo.get(3)));
            Books.setBookPrice(String.valueOf(lo.get(4)));
            Books.setCreate_date(String.valueOf(lo.get(5)));

            service.add(Books);
            System.out.println("打印信息-->"+Books.getCreate_date());
        }


        return "redirect:/list";
    }

    @RequestMapping(value="/ajax")
    public  void  ajaxUploadExcel(HttpServletRequest request,HttpServletResponse response) throws Exception {
        MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;


        InputStream in =null;
        List<List<Object>> listob = null;
        MultipartFile file = multipartRequest.getFile("upfile");
        if(file.isEmpty()){
            throw new Exception("文件不存在！");
        }

        in = file.getInputStream();
        listob = new ImportExcelUtil().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<Object> lo = listob.get(i);
            Books Books = new Books();
            Books.setBookname(String.valueOf(lo.get(1)));
            Books.setBookAuthor(String.valueOf(lo.get(2)));
            Books.setBookPublish(String.valueOf(lo.get(3)));
            Books.setBookPrice(String.valueOf(lo.get(4)));
            Books.setCreate_date(String.valueOf(lo.get(5)));

            System.out.println("打印信息-->"+Books.getCreate_date());
            service.add(Books);
        }

        PrintWriter out = null;
        response.setCharacterEncoding("utf-8");  //防止ajax接受到的中文信息乱码
        out = response.getWriter();
        out.print("文件导入成功！");
        out.flush();
        out.close();
    }


    @RequestMapping(value = "/downLoadExcel", method = RequestMethod.GET)
    public String downLoadExcel(HttpServletRequest request, HttpServletResponse response) throws IOException {
        List<Books> meteoMonitors = service.findAll();
        if (meteoMonitors != null && meteoMonitors.size() > 0) {
            String fileName = "test.xlsx";
            response.setHeader("Content-disposition", "attachment;filename="
                    + new String(fileName.getBytes("gb2312"), "ISO8859-1"));//设置文件头编码格式
            response.setContentType("APPLICATION/OCTET-STREAM;charset=UTF-8");//设置类型
            response.setHeader("Cache-Control", "no-cache");//设置头
            response.setDateHeader("Expires", 0);//设置日期头

            XSSFWorkbook workbook = new XSSFWorkbook();

            XSSFSheet sheet = workbook.createSheet();
            CellStyle cellStyle = workbook.createCellStyle();

            cellStyle.setDataFormat(workbook.createDataFormat().getFormat("yyyy-MM-dd HH:mm:ss"));





           /* CellStyle headStyle = workbook.createCellStyle();
            headStyle.setFillPattern(CellStyle.THIN_HORZ_BANDS);
            headStyle.setFillBackgroundColor(IndexedColors.LIGHT_CORNFLOWER_BLUE.getIndex());*/

            XSSFCellStyle style = workbook.createCellStyle();
            //设置背景颜色
            style.setFillForegroundColor(HSSFColor.LIME.index);
            //solid 填充  foreground  前景色
            style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);




            Row row = sheet.createRow(0);

            Cell c1 = row.createCell(0);
            //cell.setCellStyle(cellStyle);
            c1.setCellValue("id");
            c1.setCellStyle(style);

            Cell c2 = row.createCell(1);
            c2.setCellValue("书名");
            c2.setCellStyle(style);

            Cell c3 = row.createCell(2);
            c3.setCellValue("作者");
            c3.setCellStyle(style);

            Cell c4 = row.createCell(3);
            c4.setCellValue("出版社");
            c4.setCellStyle(style);

            Cell c5 = row.createCell(4);
            c5.setCellValue("价格");
            c5.setCellStyle(style);

            Cell c6 = row.createCell(5);
            c6.setCellValue("日期");
            c6.setCellStyle(style);


           // row.setRowStyle(headStyle);

            int rowNum = 1;
            for (Books meteoMonitor:meteoMonitors) {

                Row t = sheet.createRow(rowNum);

                Cell cell = t.createCell(0);
                //cell.setCellStyle(cellStyle);
                cell.setCellValue(meteoMonitor.getBookid());

                Cell cell1 = t.createCell(1);
                cell1.setCellValue(meteoMonitor.getBookname());

                Cell cell2 = t.createCell(2);
                cell2.setCellValue(meteoMonitor.getBookAuthor());

                Cell cell3 = t.createCell(3);
                cell3.setCellValue(meteoMonitor.getBookPublish());

                Cell cell4 = t.createCell(4);
                cell4.setCellValue(meteoMonitor.getBookPrice());

                Cell cell5 = t.createCell(5);
                cell5.setCellValue(meteoMonitor.getCreate_date());

                rowNum++;
            }

            workbook.write(response.getOutputStream());

            response.getOutputStream().flush();
            response.getOutputStream().close();
        }
        return null;
    }


}

d3:页面代码（ajax和from提交均可）

<%@ page language="java" contentType="text/html; charset=utf-8"
         pageEncoding="utf-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>列表</title>
<style>
    #main{width:80%;margin:10px auto}
    tr{border: 0px}
</style>
</head>
<body>
       <div id="main">
            <table style="border:1px solid black;text-align:center"width="100%">
                 <tr>
                     <td colspan="8"  style="text-align:center">
                       <form id="ff" action="/page"  method="post">
                          <input type="hidden" name="page"  id="page" value="1"/>
                           <select name="nameType">
                                <option value="">全部</option>
                                <option value="bookPublish">出版社</option>
                                <option value="booksname">书名</option>
                                <option value="bookAuthor">作者</option>
                           </select>
                           <input type="text" class="text" value="${text}" name="text"/>
                           <input class="sub" type="submit" value="搜索"/>
                        </form>
                     </td>
                 </tr>
                 <tr style="background-color: darkgrey">
                    <td>编号</td>
                    <td>书名</td>
                    <td>作者</td>
                     <td>价格</td>
                     <td>出版社</td>
                     <td>发布日期</td>
                     <td>操作</td>
                 </tr>
                 <c:forEach var="o"  items="${list }">
                 <tr class="textTable">
                        <td>${o.bookid }</td>
                        <td>${o.bookname }</td>
                        <td>${o.bookAuthor }</td>
                        <td>${o.bookPrice }</td>
                        <td>${o.bookPublish }</td>
                        <td>${o.create_date }</td>
                    <td><a href="">编辑</a>
                 </tr>
                 </c:forEach>
            </table>
            
            <div style="text-align:center;width: 100%">
               <a href="javascript:getPage(1)">首页</a>
               <a href="javascript:getPage(${currentpage-1 })">上一页</a>
                <a href="javascript:getPage(${currentpage+1 })">下一页</a>
               <a href="javascript:getPage(${pagecount})">末页</a>
               第${currentpage}页/共${pagecount }页
            </div>


           <form method="POST"  enctype="multipart/form-data" id="form1" action="uploadExcel/form">

               <label>上传文件: </label>
               <input id="upfile" type="file" name="upfile"><br> <br>

               <input type="submit" value="表单提交" onclick="return checkData()">
               <input type="button" value="ajax提交" id="btn" name="btn" >

           </form>
           <a href="uploadExcel/downLoadExcel">导出报表</a>
       </div>




       <script type="text/javascript"  src="../../js/jquery-1.12.0.min.js"></script>
       <script type="text/javascript" src="../../js/jquery.form.js"></script>
       <script>
           /*  ajax 方式上传文件操作 */
           $(document).ready(function(){
               $("#btn").click(function(){ if(checkData()){
                   alert("fdf");
                   $('#form1').ajaxSubmit({
                       url:'uploadExcel/ajax',
                       dataType: 'text',
                       success: resutlMsg,
                       error: errorMsg
                   });
                   function resutlMsg(msg){
                       alert(msg);
                       $("#upfile").val("");
                   }
                   function errorMsg(){
                       alert("导入excel出错！");
                   }
               }
               });
           });

           //JS校验form表单信息
           function checkData(){
               var fileDir = $("#upfile").val();
               var suffix = fileDir.substr(fileDir.lastIndexOf("."));
               if("" == fileDir){
                   alert("选择需要导入的Excel文件！");
                   return false;
               }
               if(".xls" != suffix && ".xlsx" != suffix ){
                   alert("选择Excel格式的文件导入！");
                   return false;
               }
               return true;
           }









           $("tr:odd").css("background-color","darkgrey");
           $(".sub").click(function () {
               if($(".text").val()==""||$(".text").val()==null){
                   alert("text不能为空");
                   return false;
               }
           })
           function getPage(index)
           {
        	   $("#page").val(index);
        	   $("#ff").submit();
           }






       </script>
</body>
</html>

(展示)本人亲身测试-成功

end

希望和大家一起学习！如有需要改正，评论留言！