使用POI对EXCEL 读入写出

一同事让我给他解析60万条数据的excel表格 剔除指定的数据  果断写了 等写了一半 他又不用了 ... 继续研究  由于是第一次使用  瞎弄弄

所需jar包

commons-codec-1.5.jar



commons-logging-1.1.jar



dom4j-1.6.1.jar



junit-3.8.1.jar



log4j-1.2.13.jar



poi-3.9-20121203.jar



poi-examples-3.9-20121203.jar



poi-excelant-3.9-20121203.jar



poi-ooxml-3.9-20121203.jar



poi-scratchpad-3.9-20121203.jar



stax-api-1.0.1.jar



xmlbeans-2.3.0.jar

package com.jokey;



import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;



import org.apache.poi.poifs.filesystem.POIFSFileSystem;

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 ExcelReaderAndWriter {

    

    private POIFSFileSystem fs;

    private  XSSFWorkbook wb;

    private  XSSFSheet sheet;

    private XSSFRow row;

    private XSSFCell cell;

    

    public static void main(String[] args) {

        try {

            // 对读取Excel表格标题测试

            

            

            ExcelReaderAndWriter excelReader = new ExcelReaderAndWriter();

            excelReader.reader();

            //excelReader.writer();

        } catch (FileNotFoundException e) {

            System.out.println("未找到指定路径的文件!");

            e.printStackTrace();

        } catch (IOException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

    }

    

    private void reader() throws IOException{

        FileInputStream is = new FileInputStream("f:\\3.xlsX");

            wb = new XSSFWorkbook(is);

            sheet = wb.getSheetAt(0);

        sheet = wb.getSheetAt(0);

        //获取总行数

        int totalRowNum = sheet.getLastRowNum();

        //这里i<==

        for (int i = 0; i <= totalRowNum; i++) {

            row = sheet.getRow(i);

            for (int j = 0; j < row.getLastCellNum(); j++) {

                System.out.print(row.getCell(j));

            }

            System.out.println("");

        }

    }

    

    private void writer() throws IOException{

        FileOutputStream os = new FileOutputStream("f:\\5.xlsx");

        //创建工作表

        wb = new XSSFWorkbook();

        sheet = wb.createSheet();

        row = sheet.createRow(0);

        cell = row.createCell(0);

        cell.setCellValue("测试的啦");

        try {

            //写入

            wb.write(os);

        } catch (IOException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

    }



}