<dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>3.11</version>
</dependency>

package com.test.bos.test;import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.junit.Test;public class POITest {@Testpublic void test() throws FileNotFoundException, IOException{String filePath = "E:\\区域导入测试数据.xls";//包装一个Excel文件对象HSSFWorkbook hssfWorkbook = new HSSFWorkbook(new FileInputStream(new File(filePath)));//读取文件中第一个Sheet标签页HSSFSheet sheetAt = hssfWorkbook.getSheetAt(0);//遍历标签页中所有的行for (Row row : sheetAt) {System.out.println();//换行//遍历行中的所有单元格for (Cell cell : row) {String value = cell.getStringCellValue();System.out.print(value);}}}
}

package com.test.bos.web.action;import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;import javax.annotation.Resource;import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Row;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;import com.test.bos.domain.Region;
import com.test.bos.service.IRegionService;
import com.test.bos.web.action.base.BaseAction;/*** 区域管理* * @author jepson**/
@Controller("regionAction")
@Scope("prototype")
public class RegionAction extends BaseAction<Region> {@Resource(name="regionService")private IRegionService regionService;// 属性驱动，接收上传的文件private File regionFile;public void setRegionFile(File regionFile) {this.regionFile = regionFile;}List<Region> regionList = new ArrayList<Region>();/*** 区域导入* @throws IOException * @throws FileNotFoundException */public String importXls() throws Exception {//包装一个excel文件对象HSSFWorkbook workbook = new HSSFWorkbook(new FileInputStream(regionFile));//读取文件中第一个sheet标签页HSSFSheet sheet = workbook.getSheet("Sheet1");//遍历页面中的每一行for (Row row : sheet) {int rowNum = row.getRowNum();//获取行号，从0开始if(rowNum==0){ //不需要第一行数据continue;//跳出本次循环
            }String id = row.getCell(0).getStringCellValue();String province = row.getCell(1).getStringCellValue();String city = row.getCell(2).getStringCellValue();String district = row.getCell(3).getStringCellValue();String postcode = row.getCell(4).getStringCellValue();//包装一个区域对象Region region = new Region(id, province, city, district, postcode, null, null, null);/** 这里不建议使用* regionService.save(region);* 而是加入一个list的集合中，然后进行批量保持。减少打开事务的次数*/regionList.add(region);}//调用service层的方法批量保存
        regionService.saveBatch(regionList);return NONE;}
}

@RequestMapping(value="/item/accountupload.action")public String accountAddBatchByUploadFile(HttpServletRequest request,HttpSession session,HttpServletResponse response, MultipartFile acountfile,Model model){List<Account> accountList = new ArrayList<Account>();try {//首先应该判断一下是否上传了文件if(!acountfile.isEmpty()){//获取上传的文件类型判断是否是一个xls格式的文件String contentType = acountfile.getContentType();if(!"application/vnd.ms-excel".equals(contentType)){model.addAttribute("uploadinfomsg", "你上传的文件类型不对");return "uploadinfo";}else{//上传的文件格式正确，使用poi技术读取excel表格的数据
                        InputStream inputStream = acountfile.getInputStream();//包装一个excel文件对象HSSFWorkbook workbook = new HSSFWorkbook(inputStream);//读取文件中第一个sheet标签页HSSFSheet sheet = workbook.getSheet("Sheet1");//获取登录用户的idInteger user_id = CommonUtils.getLoginUserId(session);//遍历页面中的每一行for (Row row : sheet) {int rowNum = row.getRowNum();//获取行号，从0开始if(rowNum==0){ //不需要第一行数据continue;//跳出本次循环
                            }String website = row.getCell(1).getStringCellValue();String url = row.getCell(2).getStringCellValue();String account = row.getCell(3).getStringCellValue();String username = row.getCell(4).getStringCellValue();String mail = row.getCell(5).getStringCellValue();//这里需要判断一下表格的类型//0表示是double类型的,1表示String类型String telephone = null;if(row.getCell(6).getCellType()==0){Double tele = row.getCell(6).getNumericCellValue();telephone = tele.toString();}else{ telephone = row.getCell(6).getStringCellValue();}//这里需要判断一下表格的类型//0表示是double类型的,1表示String类型String hint = null;if(row.getCell(7).getCellType()==0){Double h = row.getCell(7).getNumericCellValue();hint = h.toString();}else{hint = row.getCell(7).getStringCellValue();}//包装一个账户对象Account ac = new Account(website, url, account, username, mail, telephone, hint, user_id);/** 这里不建议使用* itemService.save(ac);* 而是加入一个list的集合中，然后进行批量保持。减少打开事务的次数*/accountList.add(ac);}//调用service层的方法批量保存
                        itemService.saveBatch(accountList);model.addAttribute("uploadinfomsg", "恭喜你上传成功");return "uploadinfo";}}else{model.addAttribute("uploadinfomsg", "你没有选择上传的文件");return "uploadinfo";}} catch (Exception e) {e.printStackTrace();}model.addAttribute("uploadinfomsg", "上传失败");return "uploadinfo";}

　　/*** 分区数据导出功能* @throws IOException */public String exportXls() throws IOException{//第一步：查询所有的分区数据List<Subarea> list = subareaService.findAll();//第二步：使用POI将数据写到Excel文件中//在内存中创建一个Excel文件HSSFWorkbook workbook = new HSSFWorkbook();//创建一个标签页HSSFSheet sheet = workbook.createSheet("分区数据");//创建标题行HSSFRow headRow = sheet.createRow(0);headRow.createCell(0).setCellValue("分区编号");headRow.createCell(1).setCellValue("开始编号");headRow.createCell(2).setCellValue("结束编号");headRow.createCell(3).setCellValue("位置信息");headRow.createCell(4).setCellValue("省市区");//遍历list集合for (Subarea subarea : list) {HSSFRow dataRow = sheet.createRow(sheet.getLastRowNum() + 1);dataRow.createCell(0).setCellValue(subarea.getId());dataRow.createCell(1).setCellValue(subarea.getStartnum());dataRow.createCell(2).setCellValue(subarea.getEndnum());dataRow.createCell(3).setCellValue(subarea.getPosition());dataRow.createCell(4).setCellValue(subarea.getRegion().getName());}//第三步：使用输出流进行文件下载（一个流、两个头）
        String filename = "分区数据.xls";String contentType = ServletActionContext.getServletContext().getMimeType(filename);ServletOutputStream out = ServletActionContext.getResponse().getOutputStream();ServletActionContext.getResponse().setContentType(contentType);//获取客户端浏览器类型String agent = ServletActionContext.getRequest().getHeader("User-Agent");filename = FileUtils.encodeDownloadFilename(filename, agent);ServletActionContext.getResponse().setHeader("content-disposition", "attachment;filename="+filename);workbook.write(out);return NONE;}

package cn.itcast.bos.utils;import java.io.IOException;
import java.net.URLEncoder;import sun.misc.BASE64Encoder;public class FileUtils {/*** 下载文件时，针对不同浏览器，进行附件名的编码* * @param filename*            下载文件名* @param agent*            客户端浏览器* @return 编码后的下载附件名* @throws IOException*/public static String encodeDownloadFilename(String filename, String agent)throws IOException {if (agent.contains("Firefox")) { // 火狐浏览器filename = "=?UTF-8?B?"+ new BASE64Encoder().encode(filename.getBytes("utf-8"))+ "?=";filename = filename.replaceAll("\r\n", "");} else { // IE及其他浏览器filename = URLEncoder.encode(filename, "utf-8");filename = filename.replace("+"," ");}return filename;}
}

@RequestMapping(value="/item/downloadaccount.action")public String downloadAccount(QueryVo vo,Model model,HttpServletRequest request,HttpServletResponse response,HttpSession session) throws Exception{Integer userId = CommonUtils.getLoginUserId(session);vo.setUserId(userId); // 设置当前登录用户的id//查询登录用户的所有account信息List<Account> accountList = itemService.QueryAccountList(vo);//在内存中创建一个Excel文件HSSFWorkbook workbook = new HSSFWorkbook();//创建一个标签页HSSFSheet sheet = workbook.createSheet("Sheet1");//创建标题行HSSFRow headRow = sheet.createRow(0);headRow.createCell(0).setCellValue("account_id");headRow.createCell(1).setCellValue("website");headRow.createCell(2).setCellValue("url");headRow.createCell(3).setCellValue("account");headRow.createCell(4).setCellValue("username");headRow.createCell(5).setCellValue("mail");headRow.createCell(6).setCellValue("telephone");headRow.createCell(7).setCellValue("hint");//遍历list集合for (Account ac : accountList) {HSSFRow dataRow = sheet.createRow(sheet.getLastRowNum() + 1);dataRow.createCell(0).setCellValue(ac.getId());dataRow.createCell(1).setCellValue(ac.getWebsite());dataRow.createCell(2).setCellValue(ac.getUrl());dataRow.createCell(3).setCellValue(ac.getAccount());dataRow.createCell(4).setCellValue(ac.getUsername());dataRow.createCell(5).setCellValue(ac.getMail());dataRow.createCell(6).setCellValue(ac.getTelephone());dataRow.createCell(7).setCellValue(ac.getHint());}//使用输出流进行文件下载（一个流、两个头）
       String filename = "account.xls";String contentType =request.getServletContext().getMimeType(filename);ServletOutputStream out = response.getOutputStream();response.setContentType(contentType);//获取客户端浏览器类型String agent = request.getHeader("User-Agent");filename = this.encodeDownloadFilename(filename, agent);response.setHeader("content-disposition", "attachment;filename="+filename);workbook.write(out);return null;}/*** 下载文件时，针对不同浏览器，进行附件名的编码* * @param filename*            下载文件名* @param agent*            客户端浏览器* @return 编码后的下载附件名* @throws IOException*/private String encodeDownloadFilename(String filename, String agent)throws IOException {if (agent.contains("Firefox")) { // 火狐浏览器filename = "=?UTF-8?B?"+ new BASE64Encoder().encode(filename.getBytes("utf-8"))+ "?=";filename = filename.replaceAll("\r\n", "");} else { // IE及其他浏览器filename = URLEncoder.encode(filename, "utf-8");filename = filename.replace("+"," ");}return filename;}