poi讀取Excel總結

package eiis.controller.app.sbz;

import eiis.app.sbz.entity.AppWatStationEntity;
import eiis.app.sbz.service.IAppWatStationService;
import eiis.app.sbz.util.ReadAndWriteExcelUtil;
import jxl.read.biff.BiffException;
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.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
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.ResponseBody;

import javax.servlet.http.HttpServletRequest;
import java.io.*;
import java.math.BigDecimal;
import java.time.Instant;
import java.util.*;

/**
 * Created by Administrator on 2017/3/8.
 */
@RequestMapping("/sbz/")
@Controller("/controller/app/sbz/AppWatStationController")
public class AppWatStationController {
    @Autowired
    private IAppWatStationService iAppWatStationService;
    public List<AppWatStationEntity> appWatStationEntity = new ArrayList();


    @ResponseBody
    @RequestMapping("appWatStation_readExcel")
    public String readFile(AppWatStationEntity appWatStationEntity, String data) throws IOException, BiffException {

        return "SUCCESS";
    }


  /*  @RequestMapping(value = "readExcel", method = RequestMethod.POST, params = {"filename", "suffix"})
    @ResponseBody*/
    public String readexcel(HttpServletRequest request) throws Exception {

        Workbook wb = null;
        String filename = request.getParameter("filename");
        String suffix = request.getParameter("suffix");
        String filepath = "D://"+filename;
        InputStream is = new FileInputStream(filepath);
        if(".xls".equals(suffix)){
             wb = new HSSFWorkbook(is);
            System.out.println("文件格式爲.xls");
        }else if(".xlsx".equals(suffix)){
            wb = new XSSFWorkbook(is);
            System.out.println("文件格式爲.xlsx");
        }else {
            System.out.println("文件格式錯誤！");
        }
        List<List<Map<String, String>>> result = new ArrayList<List<Map<String,String>>>();//對應excel文件
        int sheetSize = wb.getNumberOfSheets();
        System.out.println(sheetSize);
        for (int i = 0; i < sheetSize; i++) {//遍歷sheet頁
            Sheet sheet = wb.getSheetAt(i);

            List<Map<String, String>> sheetList = new ArrayList<Map<String, String>>();//對應sheet頁
            List<String> titles = new ArrayList<String>();//放置所有的標題
            int rowSize = sheet.getLastRowNum() + 1;
            for (int j = 1; j < rowSize; j++) {//遍歷行
                Row row = sheet.getRow(j);
                if (row == null) {//略過空行
                    continue;
                }
                int cellSize = row.getLastCellNum();//行中有多少個單元格，也就是有多少列
                if (j == 0 || j==1) {//第一行是標題行
                    for (int k = 0; k < cellSize; k++) {
                        Cell cell = row.getCell(k);
                        titles.add(cell.toString());
                    }
                } else {//其他行是數據行
                    Map<String, String> rowMap = new HashMap<String, String>();//對應一個數據行
                    for (int k = 0; k < titles.size(); k++) {
                        Cell cell = row.getCell(k);
                        String key = titles.get(k);
                        String value = null;
                        if (cell != null) {
                            value = cell.toString();
                        }
                        rowMap.put(key, value);
                    }
                    sheetList.add(rowMap);
                }
            }
            System.out.println(sheetList);
            result.add(sheetList);
        }

        return null;
    }

    @RequestMapping(value = "readExcel", method = RequestMethod.POST, params = {"filename", "suffix"})
    @ResponseBody
    public String  readExcelWithoutTitle(HttpServletRequest request) throws Exception{
        Workbook wb = null;
        String filename = request.getParameter("filename");
        String suffix = request.getParameter("suffix");
        String filepath = "D://"+filename;
        InputStream is = new FileInputStream(filepath);
        if(".xls".equals(suffix)){
            wb = new HSSFWorkbook(is);
            System.out.println("文件格式爲.xls");
        }else if(".xlsx".equals(suffix)){
            wb = new XSSFWorkbook(is);
            System.out.println("文件格式爲.xlsx");
        }else {
            System.out.println("文件格式錯誤！");
        }

        List<List<List<String>>> result = new ArrayList<List<List<String>>>();//對應excel文件

        int sheetSize = wb.getNumberOfSheets();
        for (int i = 0; i < sheetSize; i++) {//遍歷sheet頁
            Sheet sheet = wb.getSheetAt(i);
            List<List<String>> sheetList = new ArrayList<List<String>>();//對應sheet頁

            int rowSize = sheet.getLastRowNum() + 1;
            for (int j = 3; j < rowSize; j++) {//遍歷行
                Row row = sheet.getRow(j);
                if (row == null) {//略過空行
                    continue;
                }
                int cellSize = row.getLastCellNum();//行中有多少個單元格，也就是有多少列
                List<String> rowList = new ArrayList<String>();//對應一個數據行
                for (int k = 0; k < cellSize; k++) {
                    Cell cell = row.getCell(k);
                    String value = null;
                    if (cell != null) {
                        value = cell.toString();
                        if (k==2 && value!=null){
                          String string =  row.getCell(2).getCellComment().toString();


                        }




                    }
                    rowList.add(value);
                }
                sheetList.add(rowList);
            }
            System.out.println(sheetList);
            result.add(sheetList);

        }
            return null;

    }


}