项目总结06：Java Excel文件导入功能HSSFWorkbook（xls）和 XSSFWorkbook （xlsx）

package com.blue.pem.client.util;

import java.io.File;
import java.io.FileInputStream;
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 com.blue.common.util.PageData;


public class ObjectExcelRead {

    /**
     * @param filepath //文件路径
     * @param filename //文件名
     * @param startrow //开始行号
     * @param startcol //开始列号
     * @param sheetnum //sheet
     * @return list
     */
    
    /*读取xls文件*/
    public static List<PageData> readExcelByFileForXls(File file, int startrow, int startcol, int sheetnum) {
        List<PageData> varList = new ArrayList<PageData>();
        
        try {
            //File target = new File(filepath, filename);
            //File target = new File(file);
            FileInputStream fi = new FileInputStream(file);
            HSSFWorkbook wb = new HSSFWorkbook(fi);//xslx
            HSSFSheet sheet= wb.getSheetAt(sheetnum); //sheet 从0开始

            int rowNum = sheet.getLastRowNum() + 1;                     //取得最后一行的行号
            
            for (int i = startrow; i < rowNum; i++) {                    //行循环开始
                
                PageData varpd = new PageData();
                HSSFRow row = sheet.getRow(i);                             //行
                int cellNum = row.getLastCellNum();                     //每行的最后一个单元格位置
                
                for (int j = startcol; j < cellNum; j++) {                //列循环开始
                    
                    HSSFCell cell = row.getCell(Short.parseShort(j + ""));
                    String cellValue = null;
                    if (null != cell) {
                        switch (cell.getCellType()) {                     // 判断excel单元格内容的格式，并对其进行转换，以便插入数据库
                        case 0:
                            cellValue = String.valueOf((int) cell.getNumericCellValue());
                            break;
                        case 1:
                            cellValue = cell.getStringCellValue();
                            break;
                        case 2:
                            cellValue = cell.getNumericCellValue() + "";
                            // cellValue = String.valueOf(cell.getDateCellValue());
                            break;
                        case 3:
                            cellValue = "";
                            break;
                        case 4:
                            cellValue = String.valueOf(cell.getBooleanCellValue());
                            break;
                        case 5:
                            cellValue = String.valueOf(cell.getErrorCellValue());
                            break;
                        }
                    } else {
                        cellValue = "";
                    }
                    
                    varpd.put("var"+j, cellValue);
                    
                }
                varList.add(varpd);
            }
            
        } catch (Exception e) {
            System.out.println(e);
        }
        
        return varList;
    }
    
    /*读取xlsx文件*/
    public static List<PageData> readExcelByFileForXlsx(File file, int startrow, int startcol, int sheetnum) {
        List<PageData> varList = new ArrayList<PageData>();        
        try {
            //File target = new File(filepath, filename);
            //File target = new File(file);
            FileInputStream fi = new FileInputStream(file);
            XSSFWorkbook wb = new XSSFWorkbook(fi);//xslx
            XSSFSheet sheet= wb.getSheetAt(sheetnum); //sheet 从0开始
            int rowNum = sheet.getLastRowNum() + 1;                     //取得最后一行的行号
            
            for (int i = startrow; i < rowNum; i++) {                    //行循环开始
                
                PageData varpd = new PageData();
                XSSFRow row = sheet.getRow(i);                             //行
                int cellNum = row.getLastCellNum();                     //每行的最后一个单元格位置
                
                for (int j = startcol; j < cellNum; j++) {                //列循环开始
                    
                    XSSFCell cell = row.getCell(Short.parseShort(j + ""));
                    String cellValue = null;
                    if (null != cell) {
                        switch (cell.getCellType()) {                     // 判断excel单元格内容的格式，并对其进行转换，以便插入数据库
                        case 0:
                            cellValue = String.valueOf((int) cell.getNumericCellValue());
                            break;
                        case 1:
                            cellValue = cell.getStringCellValue();
                            break;
                        case 2:
                            cellValue = cell.getNumericCellValue() + "";
                            // cellValue = String.valueOf(cell.getDateCellValue());
                            break;
                        case 3:
                            cellValue = "";
                            break;
                        case 4:
                            cellValue = String.valueOf(cell.getBooleanCellValue());
                            break;
                        case 5:
                            cellValue = String.valueOf(cell.getErrorCellValue());
                            break;
                        }
                    } else {
                        cellValue = "";
                    }
                    
                    varpd.put("var"+j, cellValue);
                    
                }
                varList.add(varpd);
            }
            
        } catch (Exception e) {
            System.out.println(e);
        }
        
        return varList;
    }
}