Java poi+excel导入
用的SSM框架，所需要的jar包如图所示：
，链接地址：jar包下载 ，下面直接上代码。
1、ExcelUtil工具类
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.xssf.usermodel.XSSFCell;
/**
* Excel工具类
* @author lp
*
*/
public class ExcelUtil {
public static final String OFFICE_EXCEL_2003_POSTFIX = "xls";
public static final String OFFICE_EXCEL_2010_POSTFIX = "xlsx";
public static final String EMPTY = "";
public static final String POINT = ".";
public static SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");
/**
* 获得path的后缀名
* @param path
* @return
*/
public static String getPostfix(String path){
if(path==null || EMPTY.equals(path.trim())){
return EMPTY;
}
if(path.contains(POINT)){
return path.substring(path.lastIndexOf(POINT)+1,path.length());
}
return EMPTY;
}
/**
* 单元格格式
* @param hssfCell
* @return
*/
@SuppressWarnings({ "static-access", "deprecation" })
public static String getHValue(HSSFCell hssfCell){
if (hssfCell.getCellType() == hssfCell.CELL_TYPE_BOOLEAN) {
return String.valueOf(hssfCell.getBooleanCellValue());
} else if (hssfCell.getCellType() == hssfCell.CELL_TYPE_NUMERIC) {
String cellValue = "";
if(HSSFDateUtil.isCellDateFormatted(hssfCell)){
Date date = HSSFDateUtil.getJavaDate(hssfCell.getNumericCellValue());
cellValue = sdf.format(date);
}else{
DecimalFormat df = new DecimalFormat("#.##");
cellValue = df.format(hssfCell.getNumericCellValue());
String strArr = cellValue.substring(cellValue.lastIndexOf(POINT)+1,cellValue.length());
if(strArr.equals("00")){
cellValue = cellValue.substring(0, cellValue.lastIndexOf(POINT));
}
}
return cellValue;
} else {
return String.valueOf(hssfCell.getStringCellValue());
}
}
/**
* 单元格格式
* @param xssfCell
* @return
*/
public static String getXValue(XSSFCell xssfCell){
if (xssfCell.getCellType() == Cell.CELL_TYPE_BOOLEAN) {
return String.valueOf(xssfCell.getBooleanCellValue());
} else if (xssfCell.getCellType() == Cell.CELL_TYPE_NUMERIC) {
String cellValue = "";
if(XSSFDateUtil.isCellDateFormatted(xssfCell)){
Date date = XSSFDateUtil.getJavaDate(xssfCell.getNumericCellValue());
cellValue = sdf.format(date);
}else{
DecimalFormat df = new DecimalFormat("#.##");
cellValue = df.format(xssfCell.getNumericCellValue());
String strArr = cellValue.substring(cellValue.lastIndexOf(POINT)+1,cellValue.length());
if(strArr.equals("00")){
cellValue = cellValue.substring(0, cellValue.lastIndexOf(POINT));
}
}
return cellValue;
} else {
return String.valueOf(xssfCell.getStringCellValue());
}
}
/**
* 自定义xssf日期工具类
* @author lp
*
*/
class XSSFDateUtil extends DateUtil{
protected static int absoluteDay(Calendar cal, boolean use1904windowing) {
return DateUtil.absoluteDay(cal, use1904windowing);
}
}2、ExcelRead：读取Excel类
package com.ssm.util;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFCell;
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.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.web.multipart.MultipartFile;
/**
* 读取Excel
* @author lp
*
*/
public class ExcelRead {
public int totalRows; //sheet中总行数
public static int totalCells; //每一行总单元格数
/**
* read the Excel .xlsx,.xls
* @param file jsp中的上传文件
* @return
* @throws IOException
*/
public List> readExcel(MultipartFile file) throws IOException {
if(file==null||ExcelUtil.EMPTY.equals(file.getOriginalFilename().trim())){
return null;
}else{
String postfix = ExcelUtil.getPostfix(file.getOriginalFilename());
if(!ExcelUtil.EMPTY.equals(postfix)){
if(ExcelUtil.OFFICE_EXCEL_2003_POSTFIX.equals(postfix)){
return readXls(file);
}else if(ExcelUtil.OFFICE_EXCEL_2010_POSTFIX.equals(postfix)){
return readXlsx(file);
}else{
return null;
}
}
}
return null;
}
/**
* read the Excel 2010 .xlsx
* @param file
* @param beanclazz
* @param titleExist
* @return
* @throws IOException
*/
@SuppressWarnings("deprecation")
public List> readXlsx(MultipartFile file){
List> list = new ArrayList>();
// IO流读取文件
InputStream input = null;
XSSFWorkbook wb = null;
ArrayList rowList = null;
try {
input = file.getInputStream();
// 创建文档
wb = new XSSFWorkbook(input);
//读取sheet(页)
for(int numSheet=0;numSheet();
totalCells = xssfRow.getLastCellNum();
//读取列，从第一列开始
for(int c=0;c<=totalCells+1;c++){
XSSFCell cell = xssfRow.getCell(c);
if(cell==null){
rowList.add(ExcelUtil.EMPTY);
continue;
}
rowList.add(ExcelUtil.getXValue(cell).trim());
}
list.add(rowList);
}
}
}
return list;
} catch (IOException e) {
e.printStackTrace();
} finally{
try {
input.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
/**
* read the Excel 2003-2007 .xls
* @param file
* @param beanclazz
* @param titleExist
* @return
* @throws IOException
*/
public List> readXls(MultipartFile file){
List> list = new ArrayList>();
// IO流读取文件
InputStream input = null;
HSSFWorkbook wb = null;
ArrayList rowList = null;
try {
input = file.getInputStream();
// 创建文档
wb = new HSSFWorkbook(input);
//读取sheet(页)
for(int numSheet=0;numSheet();
totalCells = hssfRow.getLastCellNum();
//读取列，从第一列开始
for(short c=0;c<=totalCells+1;c++){
HSSFCell cell = hssfRow.getCell(c);
if(cell==null){
rowList.add(ExcelUtil.EMPTY);
continue;
}
rowList.add(ExcelUtil.getHValue(cell).trim());
}
list.add(rowList);
}
}
}
return list;
} catch (IOException e) {
e.printStackTrace();
} finally{
try {
input.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
}
3、Controller
/**
* 转到Excel上传页面
* @return
* @author lp
*/
@RequestMapping(value="/read")
public String addExcel(){
return "baseInfo/testExcel";
}
/**
* 读取Excel数据到数据库
* @param file
* @param request
* @return
* @throws IOException
* @author lp
*/
@RequestMapping(value="/readExcel")
public ModelAndView readExcel(@RequestParam(value="excelFile") MultipartFile file,HttpServletRequest request,HttpSession session) throws IOException{
ModelAndView mv = new ModelAndView();
//判断文件是否为空
if(file == null){
mv.addObject("msg", "failed");
mv.setViewName("excel_result");
return mv;
}
String name = file.getOriginalFilename();
long size = file.getSize();
if(name == null || ExcelUtil.EMPTY.equals(name) && size==0){
mv.addObject("msg", "failed");
mv.setViewName("excel_result");
return mv;
}
//读取Excel数据到List中
List> list = new ExcelRead().readExcel(file);
//list中存的就是excel中的数据，可以根据excel中每一列的值转换成你所需要的值（从0开始），如：
User user = null;
List liseUser = new ArrayList();
for(ArrayList arr:list){
user= new User();
user.setAuthor(list.get(0));//每一行的第一个单元格
listUser.add(user);
}
if(userService.saveBatchInsert(listUser)){
mv.addObject("msg", "success");
}else{
mv.addObject("msg", "failed");
}
mv.setViewName("excel_result");
return mv;
} （1）主页面添加“Excel导入”
Excel导入function addExcel(){var dg = new $.dialog({title:'导入Excel',id:'excel',width:1000,height:400,iconTitle:false,cover:true,maxBtn:false,xButton:true,resize:false,page:'user/read.html',});dg.ShowDialog();}
（2）导入页面