使用poi实现excle导入到数据库实战
导入到数据库关键在于将excel文件中的数据读取为一个list集合
1.jsp
<%@page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%>
<%@include file="../../../jsp/title.jsp" %>
2.controller 控制转向层
package com.youge.shop.action;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
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.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import com.youge.api.service.ProductCenterApiService;
import com.youge.shop.service.ShopService;
import com.youge.util.JSONSerializer;
import com.youge.util.PageUtil;
import com.youge.util.StringTools;
import com.youge.util.UploadUtil;
import com.youge.util.WebUtil;
/**
* 经销商管理
*
*/
@Controller
@RequestMapping("shop")
public class ShopController {
private final static Log log = LogFactory.getLog(ShopController.class);
@Autowired
private ShopService shopService;
@Autowired
private ProductCenterApiService productCenterService;
/**
* 导入excel
*
* @return
*/
@RequestMapping("excel")
public String excel(HttpServletRequest request, HttpServletResponse response) {
// 验证是否登录和是否有权限(跳转页面专用)
String returnUrl = WebUtil.getReturn(request, "");
// 如果长度大于0则验证失败
if (returnUrl.length() > 0) {
return returnUrl;
}
try {
} catch (Exception e) {
log.error("导入excel:" + e.getMessage());
}
return "shop/excel2";
}
// 导入excel
@RequestMapping(value = "/import", method = RequestMethod.POST)
@ResponseBody
public String importExcel(@RequestParam(value = "file", required = false) MultipartFile file,
HttpServletRequest request, HttpServletResponse response) {
String ret_data = "";
// 返回值（ajax专用）
Map returnMap = WebUtil.getReturnMap_A(request, "");
// 验证是否登录和是否有权限
if ((boolean) returnMap.get(WebUtil.RETURM_ERR)) {
return JSONSerializer.serialize(returnMap);
}
try {
String result = shopService.readExcelFile(file);
returnMap.put("describe", result);
if (result.equals("上传成功")) {
returnMap.put("msg", true);
} else {
returnMap.put("msg", false);
}
} catch (Exception e) {
log.error(e.getMessage());
}
//4.map转json
ret_data = JSONSerializer.serialize(returnMap);
return ret_data;
}
}
3.service层
public String readExcelFile(MultipartFile file) {
String result = "";
// 创建处理EXCEL的类
ReadExcel2 readExcel = new ReadExcel2();
// 解析excel，获取上传的事件单
List> shopList = readExcel.getExcelInfo(file);
// 至此已经将excel中的数据转换到list里面了,接下来就可以操作list,可以进行保存到数据库,或者其他操作,
for (Map shop : shopList) {
Map params = new HashMap<>();
params.put("shop_province", shop.get("shop_province"));
params.put("shop_city", shop.get("shop_city"));
params.put("shop_area", shop.get("shop_area"));
params.put("shop_name", shop.get("shop_name"));
params.put("shop_linkman", shop.get("shop_linkman"));
params.put("shop_phone", shop.get("shop_phone"));
params.put("shop_address", shop.get("shop_address"));
int ret = shopDao.createShop(params);
if (ret == 0) {
result = "插入数据库失败";
}
}
if (shopList != null && !shopList.isEmpty()) {
result = "上传成功";
} else {
result = "上传失败";
}
return result;
} 4.最后是读取文件工具类
package com.youge.shop.service;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.poi.hssf.usermodel.HSSFCell;
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;
import org.springframework.web.multipart.MultipartFile;
/**
*
* @author hewangtong
*
*/
public class ReadExcel2 {
// 总行数
private int totalRows = 0;
// 总条数
private int totalCells = 0;
// 错误信息接收器
private String errorMsg;
// 构造方法
public ReadExcel2() {
}
// 获取总行数
public int getTotalRows() {
return totalRows;
}
// 获取总列数
public int getTotalCells() {
return totalCells;
}
// 获取错误信息
public String getErrorInfo() {
return errorMsg;
}
/**
* 读EXCEL文件，获取信息集合
*
* @param fielName
* @return
*/
public List> getExcelInfo(MultipartFile mFile) {
String fileName = mFile.getOriginalFilename();// 获取文件名
// List> userList = new LinkedList>();
try {
if (!validateExcel(fileName)) {// 验证文件名是否合格
return null;
}
boolean isExcel2003 = true;// 根据文件名判断文件是2003版本还是2007版本
if (isExcel2007(fileName)) {
isExcel2003 = false;
}
return createExcel(mFile.getInputStream(), isExcel2003);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 根据excel里面的内容读取客户信息
*
* @param is 输入流
* @param isExcel2003 excel是2003还是2007版本
* @return
* @throws IOException
*/
public List> createExcel(InputStream is, boolean isExcel2003) {
try {
Workbook wb = null;
if (isExcel2003) {// 当excel是2003时,创建excel2003
wb = new HSSFWorkbook(is);
} else {// 当excel是2007时,创建excel2007
wb = new XSSFWorkbook(is);
}
return readExcelValue(wb);// 读取Excel里面的信息
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
/**
* 读取Excel里面客户的信息
*
* @param wb
* @return
*/
private List> readExcelValue(Workbook wb) {
// 得到第一个shell
Sheet sheet = wb.getSheetAt(0);
// 得到Excel的行数
this.totalRows = sheet.getPhysicalNumberOfRows();
// 得到Excel的列数(前提是有行数)
if (totalRows > 1 && sheet.getRow(0) != null) {
this.totalCells = sheet.getRow(0).getPhysicalNumberOfCells();
}
List> userList = new ArrayList>();
// 循环Excel行数
for (int r = 1; r < totalRows; r++) {
Row row = sheet.getRow(r);
if (row == null) {
continue;
}
// 循环Excel的列
Map map = new HashMap();
for (int c = 0; c < this.totalCells; c++) {
Cell cell = row.getCell(c);
if (null != cell) {
if (c == 0) {
// 如果是纯数字,比如你写的是25,cell.getNumericCellValue()获得是25.0,通过截取字符串去掉.0获得25
if (cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
String shop_province = String.valueOf(cell.getNumericCellValue());
map.put("shop_province", shop_province.substring(0, shop_province.length() - 2 > 0 ? shop_province.length() - 2 : 1));// 省
} else {
map.put("shop_province", cell.getStringCellValue());// 省
}
} else if (c == 1) {
if (cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
String shop_city = String.valueOf(cell.getNumericCellValue());
map.put("shop_city",shop_city.substring(0, shop_city.length() - 2 > 0 ? shop_city.length() - 2 : 1));// 市
} else {
map.put("shop_city",cell.getStringCellValue());// 市
}
} else if (c == 2) {
if (cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
String shop_area = String.valueOf(cell.getNumericCellValue());
map.put("shop_area", shop_area.substring(0, shop_area.length() - 2 > 0 ? shop_area.length() - 2 : 1));// 区
} else {
map.put("shop_area", cell.getStringCellValue());// 区
}
} else if (c == 3) {
if (cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
String shop_name = String.valueOf(cell.getNumericCellValue());
map.put("shop_name", shop_name.substring(0, shop_name.length() - 2 > 0 ? shop_name.length() - 2 : 1));// 经销商名称
} else {
map.put("shop_name", cell.getStringCellValue());// 经销商名称
}
} else if (c == 4) {
if (cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
String shop_linkman = String.valueOf(cell.getNumericCellValue());
map.put("shop_linkman", shop_linkman.substring(0, shop_linkman.length() - 2 > 0 ? shop_linkman.length() - 2 : 1));// 负责人
} else {
map.put("shop_linkman", cell.getStringCellValue());// 负责人
}
} else if (c == 5) {
if (cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
String shop_phone = String.valueOf(cell.getNumericCellValue());
map.put("shop_phone", shop_phone.substring(0, shop_phone.length() - 2 > 0 ? shop_phone.length() - 2 : 1));// 电话
} else {
map.put("shop_phone", cell.getStringCellValue());// 电话
}
} else if (c == 6) {
if (cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
String shop_address = String.valueOf(cell.getNumericCellValue());
map.put("shop_address", shop_address.substring(0, shop_address.length() - 2 > 0 ? shop_address.length() - 2 : 1));//地址
} else {
map.put("shop_address", cell.getStringCellValue());//地址
}
}
}
}
// 添加到list
userList.add(map);
}
return userList;
}
/**
* 验证EXCEL文件
*
* @param filePath
* @return
*/
public boolean validateExcel(String filePath) {
if (filePath == null || !(isExcel2003(filePath) || isExcel2007(filePath))) {
errorMsg = "文件名不是excel格式";
return false;
}
return true;
}
// @描述：是否是2003的excel，返回true是2003
public static boolean isExcel2003(String filePath) {
return filePath.matches("^.+\\.(?i)(xls)$");
}
// @描述：是否是2007的excel，返回true是2007
public static boolean isExcel2007(String filePath) {
return filePath.matches("^.+\\.(?i)(xlsx)$");
}
}
5.本文使用到的jar包
(1)dom4j-1.6.1.jar
(2)poi-3.8-20120326.jar
(3)poi-examples-3.8-20120326.jar
(4)poi-excelant-3.8-20120326.jar
(5)poi-ooxml-3.8-20120326.jar
(6)poi-ooxml-schemas-3.8-20120326.jar
(7)poi-scratchpad-3.8-20120326.jar
(8)xmlbeans-2.6.0.jar
导入时可能遇到的问题:电话号码格式被转换成了1.3E的格式存入数据库,使用以下读取excel的格式即可
if(cell.getCellType() == Cell.CELL_TYPE_NUMERIC){ //数字
if(String.valueOf(cell.getNumericCellValue()).indexOf("E")==-1){
map.put("shop_phone", String.valueOf(cell.getNumericCellValue()));
}else {
map.put("shop_phone", new DecimalFormat("#").format(cell.getNumericCellValue()));
}
}