POI操作Excel详解，读取xls和xlsx格式的文件

Posted 2020-09-16

package org.ian.webutil;

 

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStream;

 

import jxl.Cell;

import jxl.Sheet;

import jxl.Workbook;

import jxl.read.biff.BiffException;

 

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

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;

 

 

public class ReadExcel {

 

    private static final Log log = LogFactory.getLog(ReadExcel.class);

 

     

    /**

     * 判断后缀分批入

     */

    private static void parseSUCCEXX(String realPath,String fileName){

         

        String [] pfix= fileName.split("\\.");

        String suffix = pfix[pfix.length -1];

         

        if( suffix!=null&&!suffix.equals("")&&suffix.equals("xls")){

             

            System.out.println("xls");

            // jxl方法可读取.xls格式

            jlxExcel(realPath,fileName);

        }else if(suffix .equals("xlsx")){

             

            System.out.println("xlsx");

            // poi方法可读取Excel2007即.xlsx格式

            poiExcel(realPath,fileName);

        }

    }

     

    /**

     * 读取 xls JXL

     * @param realPath

     * @param fileName

     */

    private static void jlxExcel(String realPath,String fileName){

            //===============jlx方法=================

            try{

            File fileDes = new File(realPath);

            InputStream str = new FileInputStream(fileDes);

            // 构造Workbook（工作薄）对象

            Workbook rwb=Workbook.getWorkbook(str);

            Sheet rs=rwb.getSheet(0);//获取第一张工作表

            int rsRows=rs.getRows();//获取Sheet表中所包含的总行数

            int rsCols=rs.getColumns();//获取Sheet表中所包含的总列数

            log.info("========行========"+rsRows+"=====列========"+rsCols);

            for(int i=1;i<rsRows;i++){//读取行

                log.info("========执行第========"+i+"行");

                for(int j=0;j<rsCols;j++){

                    log.info("========执行第========"+j+"列");

                    Cell coo=rs.getCell(j, i);//单元格定位列，再定位行

                    log.info("========coo========"+coo);

                    String strc=coo.getContents();//读取内容

                    log.info("========读取内容strc========"+strc);

                    System.out.println("文件"+fileName+"的内容为："+strc);

                }

            }

            rwb.close(); 

            }catch (FileNotFoundException e) {  

                 e.printStackTrace();  

            } catch (BiffException e) {  

             e.printStackTrace();  

            } catch (IOException e) {  

             e.printStackTrace();  

            }  

                 

            //==========读取excel文件内容=结束=====================

             

    }

     

    /**

     * POI读取   xlsx

     * @param realPath

     * @param fileName

     */

    private static void poiExcel(String realPath,String fileName){

        try{

            File fileDes = new File(realPath);

            InputStream str = new FileInputStream(fileDes);

            XSSFWorkbook xwb = new XSSFWorkbook(str);  //利用poi读取excel文件流

            XSSFSheet st = xwb.getSheetAt(0);  //读取sheet的第一个工作表

            int rows=st.getLastRowNum();//总行数

            int cols;//总列数

            log.info("========行========"+rows);

            for(int i=0;i<rows;i++){

                XSSFRow row=st.getRow(i);//读取某一行数据

                if(row!=null){

                    //获取行中所有列数据

                    cols=row.getLastCellNum();

                    log.info("========行========"+rows+"=====列========"+cols);

                for(int j=0;j<cols;j++){

                    XSSFCell cell=row.getCell(j);

                    if(cell==null){

                        System.out.print("   "); 

                    }else{

                    //判断单元格的数据类型

                    switch (cell.getCellType()) { 

                        case XSSFCell.CELL_TYPE_NUMERIC: // 数字 

                            System.out.print(cell.getNumericCellValue() + "   "); 

                            break; 

                        case XSSFCell.CELL_TYPE_STRING: // 字符串 

                            System.out.print(cell.getStringCellValue() + "   "); 

                            break; 

                        case XSSFCell.CELL_TYPE_BOOLEAN: // Boolean 

                            System.out.println(cell.getBooleanCellValue() + "   "); 

                            break; 

                        case XSSFCell.CELL_TYPE_FORMULA: // 公式 

                            System.out.print(cell.getCellFormula() + "   "); 

                            break; 

                        case XSSFCell.CELL_TYPE_BLANK: // 空值 

                            System.out.println(""); 

                            break; 

                        case XSSFCell.CELL_TYPE_ERROR: // 故障 

                            System.out.println("故障"); 

                            break; 

                        default: 

                            System.out.print("未知类型   "); 

                            break; 

                        } 

                }

                }

                }

            }

        }catch(IOException e){

            e.printStackTrace();  

        }

         

    }

 

     

    /**

     * test

     * @param args

     */

    public static void main(String[] args) {

        String fileName = "banShot.xlsx";

        String realPath = "d:/"+fileName;

         

        parseSUCCEXX(realPath, fileName);

         

    }

 

}