Java POI 导入Excel以及解析Excel

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

 "color:#993399;">"font-size:18px;color:#993399;">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
                 XSSFSheet xssfSheet = wb.getSheetAt(numSheet);
                 if(xssfSheet == null){
                     continue;
                 }
                 totalRows = xssfSheet.getLastRowNum();
                 //读取Row,从第二行开始
                 for(int rowNum = 1;rowNum <= totalRows;rowNum++){
                     XSSFRow xssfRow = xssfSheet.getRow(rowNum);
                     if(xssfRow!=null){
                         rowList = new ArrayList();
                         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());
                         }
                     }
                 }
             }
             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
                 HSSFSheet hssfSheet = wb.getSheetAt(numSheet);
                 if(hssfSheet == null){
                     continue;
                 }
                 totalRows = hssfSheet.getLastRowNum();
                 //读取Row,从第二行开始
                 for(int rowNum = 1;rowNum <= totalRows;rowNum++){
                     HSSFRow hssfRow = hssfSheet.getRow(rowNum);
                     if(hssfRow!=null){
                         rowList = new ArrayList();
                         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

 "color:#993399;">"code" class="java">"color:#993399;">/**
      * 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;
     }

4、jsp

（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

 <body>
     <form action="readExcel.html" enctype="multipart/form-data" method="post" id="batchAdd" name="batchAdd" target="result" onsubmit="return check();>
         <div style="margin: 30px;">
         <div><input id="excel_file" type="file" name="excelFile" size="50"/>
     form>
     <iframe name="result" id="result" src="about:blank" frameborder="0" width="0" height="0">iframe>
 body>
 html>
 <script type="text/javascript">
         var dg;
         $(document).ready(function(){
             dg = frameElement.lhgDG;
             dg.addBtn('ok','保存',function(){
             $("#batchAdd").submit();
             this.disabled=true;
             });
         });

         function success(){
             if(dg.curWin.document.forms[0]){
                 dg.curWin.document.forms[0].action = dg.curWin.location+"";
                 dg.curWin.document.forms[0].submit();
             }else{
                 dg.curWin.location.reload();
             }
             dg.cancel();
         }

         function failed(){
             alert("上传失败！");
         }
 script>

（3）提示页面

 <body>
     <script type="text/javascript">
         var msg = "${msg}";
         if(msg=="success" || msg==""){
             alert("保存成功");
             parent.success();
         }else{
             parent.failed();
         }
     script>
 body>

5、service层

service
boolean saveBatchInsert(List listUser);

serviceimpl
@Transactional
public boolean saveBatchInsert(List listUser){
boolean flag = false;
if(listBaseInfo != null){
userMapper.batchInsert(listUser);
flag = true;
}
return flag;
}

6、dao层

void batchInsert(List list);

7、xml（oracle） 

 <insert id="batchInsert" parameterType="java.util.List" useGeneratedKeys="false" keyProperty="Id">
         insert into baseinfo(ID,Name,Sex,Birth,IdCardNo,Address,Tel,Author,AddDate,Status)
         <foreach collection="list" item="item" index="index" separator="union all">
             (select
         <span style="white-space:pre">    span>#{item.id,jdbcType=NUMERIC},
                #{item.name,jdbcType=VARCHAR},
                #{item.sex,jdbcType=CHAR},
                #{item.birth,jdbcType=DATE},
                #{item.idCardNo,jdbcType=CHAR},
                #{item.address,jdbcType=VARCHAR},
                #{item.tel,jdbcType=VARCHAR},
                #{item.author,jdbcType=VARCHAR},
                #{item.addDate,jdbcType=DATE},
                #{item.status,jdbcType=CHAR}
             from dual)
         foreach>
     insert>

 

Java POI 导入Excel并解析

导入Excel表的数据，主要包括web端上传部分和spring后端代码。

      1、Web页面代码

      ，注意form里需增加encType="multipart/form-data"

      2、spring后台接收

      参数接收中增加@RequestParam("excelFile")MultipartFile excelFile

      3、Excel文件解析

      核心代码如下：

     

 try{
                     InputStream inputStream = excelFile.getInputStream();
                     POIFSFileSystem fs = new POIFSFileSystem(inputStream);
                     HSSFWorkbook workbook = new HSSFWorkbook(fs);
                     //XSSFWorkbook workbook = new XSSFWorkbook(fs);


                     HSSFSheet sheet = workbook.getSheetAt(0);
                     int rowNum = sheet.getLastRowNum();// 行
                     int cellNum;

                     HSSFRow row;
                     HSSFCell cell;
                     String value = "";


                   for (int i = 1; i <= rowNum; i++) {
                       row = sheet.getRow(i);
                       cellNum = row.getLastCellNum();// 列
                       recStrb = new StringBuffer("");

                       for (int j = 0; j < cellNum; j++) {//对一行的每个列进行解析

                           cell = row.getCell((short) j);
                           cell.setEncoding(HSSFCell.ENCODING_UTF_16);
                           if(j == 0){
                               value = String.valueOf((int)cell.getNumericCellValue());//数字型的值

                           }else if(j == 1){
                               value = String.valueOf((int)cell.getNumericCellValue());

                           }else if(j == 2){//
                             value = cell.getStringCellValue();//字符型的值

                           }else{

                           }

                         if (StringUtils.isEmpty(value)) {
                               recStrb.append("null, ");
                         } else {
                             recStrb.append("'" + value + "', ");//对取得的值进行处理
                         }

                       }

                       //数据的自定义处置
                       if (i > 0) {
 //                        log.debug(recStrb.toString());
                           recStrb.append("'"+super_parts_code+"', ");
                           String strTemp = recStrb.toString();
                           strTemp = strTemp.substring(0,strTemp.lastIndexOf(","));
                           dataList.add(strTemp);
                       }
                   }