SpringMVC + JDBC + POI Excel导出与导入 +下载资源

最近用 POI 做了个导入导出,所以自己就搭了个 SpringMVC + JDBC + POI 的简单框架,把过程记录一下,方便回忆

demo框架: SpringMVC + JDBC 数据库:mysql

我们侧重点在表格导入导出,关于框架部分不在描述

直接贴代码:

页面部分:show.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>
<c:set var="baseurl" value="${pageContext.request.contextPath}" />
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script type="text/javascript" src="${baseurl }/js/jquery.js"></script>
<script type="text/javascript" src="${baseurl }/js/jquery.form.js"></script>
<title>demo</title>
</head>
<body><form method="post"  action="<%=basePath%>/excel/exportExcel" data-validate-type="server"><input type="submit" value="导出Excel"></form><form id="file_form" action="<%=basePath%>/excel/importExcel" enctype="multipart/form-data"method="post"><input type="file" name="file" id="file_input" /> <input type="submit" value="文件上传" id='upFile-btn'></form><script type="text/javascript">$(function() {$("#file_form").submit(function() {//首先验证文件格式var fileName = $('#file_input').val();if (fileName === '') {alert('请选择文件');return false;}var fileType = (fileName.substring(fileName.lastIndexOf(".") + 1, fileName.length)).toLowerCase();if (fileType !== 'xls' && fileType !== 'xlsx') {alert('文件格式不正确，excel文件！');return false;}$("#file_form").ajaxSubmit({// dataType : "json",success : function(data) {if (data === 'OK') {console.log('上传文件成功');} else {console.log('文件格式错误');}return false;},error : function(){alert("error....");return false;}});return false;});});</script>
</body>
</html>

controller 部分:

package com.demo.main.excel.controller;import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import org.apache.poi.hssf.usermodel.HSSFWorkbook;
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.ResponseBody;import com.demo.main.excel.service.ExcelService;
import com.demo.main.util.WebUtil;@Controller
@RequestMapping("/excel")
public class ExcelController {// 引入 service 层@Autowiredprivate ExcelService excelService;@RequestMapping("/show")public String main(){System.out.println("main...");return "show";}// excel 表格导出@RequestMapping("/exportExcel")public String exportExcel(HttpServletRequest request,HttpServletResponse response){OutputStream os = null;HSSFWorkbook wb = excelService.writeExcel();String fileName = "部门名单.xls";response.setContentType("application/vnd.ms-excel");try {response.setHeader("Content-disposition", "attachment;filename="+ URLEncoder.encode(fileName, "utf-8"));  os = response.getOutputStream();  wb.write(os);} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();} return null;}@RequestMapping("/importExcel")@ResponseBodypublic String importExcel(HttpServletRequest request,HttpServletResponse response){PrintWriter out = null;try {out = response.getWriter();String msg = excelService.importExcel(request, response);out.write(msg);out.flush();out.close();} catch (Exception e) {e.printStackTrace();}return null;}@RequestMapping("/downLoadFile")public String downLoadFile(HttpServletRequest request,HttpServletResponse response){try {//baseUrl:E:\gyy\local_tomcat_7.0.53\webapps\demoString path = WebUtil.getBaseUrl()+File.separator+"downloads"+File.separator+"botnet"+File.separator+"CCBlack.xls";excelService.dowmloads(path, response, request );} catch (Exception e) {e.printStackTrace();}return null;}}

service 部分:

package com.demo.main.excel.service;import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLEncoder;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.util.mime.MimeUtility;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CreationHelper;
import org.apache.poi.ss.usermodel.DateUtil;
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.ss.usermodel.WorkbookFactory;
import org.apache.poi.ss.util.CellRangeAddress;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import com.demo.main.excel.dao.PeopleDao;
import com.demo.main.excel.data.AllPeople;@Service("excelService")
public class ExcelService {@Autowiredprivate PeopleDao peopleDao;// = new PeopleDao()
//  peopleDao = new PeoPleDao();public HSSFWorkbook writeExcel(){HSSFWorkbook wook = new HSSFWorkbook();HSSFSheet sheet=wook.createSheet("部门名单");  CreationHelper createHelper=wook.getCreationHelper();  HSSFCellStyle style=wook.createCellStyle(); //在sheet中创建一行  HSSFRow rowTop=sheet.createRow(0); HSSFCell createCell = rowTop.createCell(0);createCell.setCellValue("部门名额");style.setAlignment(HSSFCellStyle.ALIGN_CENTER);createCell.setCellStyle(style);//合并单元格CellRangeAddress构造参数依次表示起始行，截至行，起始列， 截至列sheet.addMergedRegion(new CellRangeAddress(0,0,0,2));HSSFRow row=sheet.createRow(1);  //在该行写入各种类型的数据  row.createCell(0).setCellValue("序号");  row.createCell(1).setCellValue("姓名");  row.createCell(2).setCellValue("时间");// 遍历数据库 取出数据,放入表格里//在写入 日期格式的 数据需要进行特殊处理(这是一种 简单的处理方式)  style.setDataFormat(createHelper.createDataFormat().getFormat("yyyy-MM-dd"));int rowNum = 1;List<AllPeople> peopleList = peopleDao.queryList(0);for (AllPeople allPeople : peopleList) {rowNum ++;HSSFRow rowInsert=sheet.createRow(rowNum);rowInsert.createCell(0).setCellValue(allPeople.getId());rowInsert.createCell(1).setCellValue(allPeople.getName());HSSFCell cell = rowInsert.createCell(2);cell.setCellValue(new Date());cell.setCellStyle(style);}return wook;}/*** 从页面上传 Excel 表格* @param request* @param response*/public String importExcel(HttpServletRequest request,HttpServletResponse response){response.setCharacterEncoding("utf-8");//   response.setContentType("application/json");try {FileItemFactory factory = new DiskFileItemFactory();ServletFileUpload upload = new ServletFileUpload(factory);upload.setHeaderEncoding(request.getCharacterEncoding());List<FileItem> list = upload.parseRequest(request);// 暂时 只读取一个 sheetfor (int i = 0; i <1; i++) {FileItem item = list.get(0);if (item.getName().endsWith(".xls")||item.getName().endsWith(".xlsx")) {List<AllPeople> excelList = getExcelList(item.getInputStream());peopleDao.insertData(excelList);return "ok";} else {return "false";}}} catch (Exception e) {e.printStackTrace();return "false";}return "false";}/*** 下载模板 */public  void dowmloads(String filepath, HttpServletResponse response,HttpServletRequest request) throws IOException {File file = new File(filepath);if (!(file.exists())) {response.sendError(404);return;}BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));byte[] buy = new byte[1024];response.reset();//1.设置文件ContentType类型，这样设置，会自动判断下载文件类型  response.setContentType("multipart/form-data");//2.设置文件头：最后一个参数是设置下载文件名(假如我们叫a.pdf)  response.setHeader("Content-Disposition", "attachment;fileName="+ file.getName());OutputStream ops = response.getOutputStream();int len;while ((len = bis.read(buy)) > 0) {ops.write(buy, 0, len);}bis.close();ops.close();ops.flush();}/**** 这种方法支持03，和07版本的excel读取* 但是对于合并的单元格，除了第一行第一列之外，其他部分读取的值为空* @param is* @throws IOException * @throws Exception */public List<AllPeople>  getExcelList(InputStream is) throws Exception {ArrayList<AllPeople> peopleList = new ArrayList<AllPeople>();Workbook wb = WorkbookFactory.create(is);int sheetNumber = wb.getNumberOfSheets();// 所有的 sheet for (int i = 0; i < sheetNumber; i++) {Sheet sheet = wb.getSheetAt(i);// 跳过表头for (int j = 2; j <= sheet.getLastRowNum(); j++) {Row row = sheet.getRow(j);AllPeople people = new AllPeople();// 读取每一个单元格people.setId(Integer.parseInt(getValue(row.getCell(0))));//.split(".")[0]people.setName(getValue(row.getCell(1)));people.setSelectTime(getValue(row.getCell(2)));peopleList.add(people);}}return peopleList;}/*** 获取单元格内容** @param cell* @return*/public static String getValue(Cell cell) {String cellValue = "";if (cell == null)return cellValue;switch (cell.getCellType()) {case HSSFCell.CELL_TYPE_NUMERIC:if (HSSFDateUtil.isCellDateFormatted(cell)) {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");cellValue = sdf.format(HSSFDateUtil.getJavaDate(cell.getNumericCellValue())).toString();return cellValue;} else {double strCell = cell.getNumericCellValue();DecimalFormat formatCell = (DecimalFormat) NumberFormat.getPercentInstance();formatCell.applyPattern("0");cellValue = formatCell.format(strCell);if (Double.parseDouble(cellValue) != strCell) {formatCell.applyPattern("0.00");cellValue = formatCell.format(strCell);}return cellValue;}case HSSFCell.CELL_TYPE_STRING:cellValue = cell.getStringCellValue();return cellValue.trim();case HSSFCell.CELL_TYPE_FORMULA:cellValue = cell.getCellFormula();return cellValue.trim();case HSSFCell.CELL_TYPE_BLANK:return cellValue.trim();case HSSFCell.CELL_TYPE_BOOLEAN:cellValue = cell.getBooleanCellValue() + "";return cellValue.trim();case HSSFCell.CELL_TYPE_ERROR:cellValue = cell.getErrorCellValue() + "";return cellValue.trim();default:return cellValue.trim();}}public static void main(String[] args) {new ExcelService().writeExcel();}
}

dao 层部分:

package com.demo.main.excel.dao;import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Random;import org.springframework.stereotype.Repository;import com.demo.main.excel.data.AllPeople;
import com.demo.main.util.JdbcUtil;
import com.mysql.jdbc.PreparedStatement;@Repository("peopleDao")
public class PeopleDao {/***  初始化数据 导入,把图片数据(all 中) 全部导入 数据库* @param allPepple*/public void initData(List<String>  allPepple){Connection con = JdbcUtil.getConnection();try {Statement statemenet = con.createStatement();if(allPepple != null && allPepple.size() > 0){for (String name : allPepple) {String query = "insert into allpeople (name, isSelected) values('"+ name + "','" + 0 + "')";statemenet.addBatch(query);}}int[] number = statemenet.executeBatch();System.out.println(" 共插入 数据:"+number.length +"条!");statemenet.close();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}finally{//JdbcUtil.close(con);}}/***  初始化数据 导入,把图片数据(all 中) 全部导入 数据库* @param allPepple*/public void insertData(List<AllPeople>  peppleList){Connection con = JdbcUtil.getConnection();try {Statement statemenet = con.createStatement();if(peppleList != null && peppleList.size() > 0){for (AllPeople people : peppleList) {String query = "insert into allpeople (name, isSelected,selectTime) values('"+ people.getName() + "','" +people.getIsSelect() + "','" + people.getSelectTime() + "')";statemenet.addBatch(query);}}int[] number = statemenet.executeBatch();System.out.println(" 共插入 数据:"+number.length +"条!");statemenet.close();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}/*** 抽中后 ,更新状态* @param name*/public void updateInfo(String name ,int isSelected){Connection con = JdbcUtil.getConnection();String insertTime ="";if(isSelected == 1){SimpleDateFormat now = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");String nowTime = now.format( new Date() ); insertTime = nowTime;}String sql ="update allpeople SET selectTime = '"+insertTime+"',isSelected = '" + isSelected + "' where name='" + name + "'";PreparedStatement pstmt;try {pstmt = (PreparedStatement) con.prepareStatement(sql);pstmt.executeUpdate();pstmt.close();} catch (SQLException e) {e.printStackTrace();}finally{//JdbcUtil.close(con);}}/*** * @param isSelected 1: 选择  0:没有选中* @return*/public List<AllPeople> queryList(int isSelected){Connection con = JdbcUtil.getConnection();List<AllPeople> list = new ArrayList<AllPeople>();String sql = "select * from allpeople where isSelected = ?";PreparedStatement pstmt;try {//根据sql语句创建预处理对象pstmt = (PreparedStatement) con.prepareStatement(sql);pstmt.setObject(1, isSelected);//执行更新ResultSet rs = pstmt.executeQuery();while(rs.next()){AllPeople people = new AllPeople();String name=rs.getString("name");int  id=rs.getInt("id");people.setId(id);people.setName(name);list.add(people);}pstmt.close();} catch (SQLException e) {e.printStackTrace();}return list;
}public void clearData(){Connection con = JdbcUtil.getConnection();try {Statement sta = con.createStatement();String sql = "TRUNCATE TABLE allpeople";sta.execute(sql);sta.close();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}
}

实体类部分:

package com.demo.main.excel.data;public class AllPeople {private int id;private String name;private int isSelect;private String selectTime;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getIsSelect() {return isSelect;}public void setIsSelect(int isSelect) {this.isSelect = isSelect;}public String getSelectTime() {return selectTime;}public void setSelectTime(String selectTime) {this.selectTime = selectTime;}}

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