Java poi讀取,寫入Excel2003

Java poi讀取,寫入Excel2003

相關閱讀：
poi讀寫Excel2007:http://www.cnblogs.com/gavinYang/p/3576741.html
jxl讀寫excel2003/2007:http://www.cnblogs.com/gavinYang/p/3576819.html

package com.gavin.operational.excle;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

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.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.ss.usermodel.Row;

public class ReadExcelXls {

    public static void main(String[] args) throws Exception{
        //讀取xls
        Map<Integer, List<String[]>> map = readXls("E:/測試讀取XLS.xls");
        for(int n=0;n<map.size();n++){
            List<String[]> list = map.get(n);
            System.out.println("-------------------------sheet"+n+"--------------------------------");
            for(int i=0;i<list.size();i++){
                String[] arr = (String[]) list.get(i);
                for(int j=0;j<arr.length;j++){
                    if(j==arr.length-1)
                        System.out.print(arr[j]);
                    else
                        System.out.print(arr[j]+"|");
                }
                System.out.println();
            }
        }
        //寫入xls
        writeXls("E:/測試寫入XLS.xls",map);
    }
    
    
    //讀取xls
    public static Map<Integer, List<String[]>> readXls(String fileName) {
        Map<Integer, List<String[]>> map = new HashMap<Integer, List<String[]>>();
        try {
            InputStream is = new FileInputStream(fileName);
            HSSFWorkbook hssfWorkbook = new HSSFWorkbook(is);
            // 循環工做表Sheet  
            for (int numSheet = 0; numSheet < hssfWorkbook.getNumberOfSheets(); numSheet++) {
                HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(numSheet);
                if (hssfSheet == null) {
                    continue;
                }
                List<String[]> list = new ArrayList<String[]>();
                //總行數:hssfSheet.getLastRowNum()-hssfSheet.getFirstRowNum()+1);
                // 循環行Row
                for (int rowNum = 0; rowNum <= hssfSheet.getLastRowNum(); rowNum++) {
                    HSSFRow hssfRow = hssfSheet.getRow(rowNum);
                    if (hssfRow == null) {
                        continue;
                    }
                    String[] singleRow = new String[hssfRow.getLastCellNum()];
                    for(int column=0;column<hssfRow.getLastCellNum();column++){
                        Cell cell = hssfRow.getCell(column,Row.CREATE_NULL_AS_BLANK);
                        switch(cell.getCellType()){
                            case Cell.CELL_TYPE_BLANK:
                                singleRow[column] = "";
                                break;
                            case Cell.CELL_TYPE_BOOLEAN:
                                singleRow[column] = Boolean.toString(cell.getBooleanCellValue());
                                break;
                            case Cell.CELL_TYPE_ERROR:
                                singleRow[column] = "";
                                break;
                            case Cell.CELL_TYPE_FORMULA:
                                cell.setCellType(Cell.CELL_TYPE_STRING);
                                singleRow[column] = cell.getStringCellValue();
                                if (singleRow[column] != null) {
                                    singleRow[column] = singleRow[column].replaceAll("#N/A", "").trim();
                                }
                                break;
                            case Cell.CELL_TYPE_NUMERIC:
                                if (DateUtil.isCellDateFormatted(cell)) {
                                    singleRow[column] = String.valueOf(cell.getDateCellValue());
                                } else {
                                    cell.setCellType(Cell.CELL_TYPE_STRING);
                                    String temp = cell.getStringCellValue();
                                    // 判斷是否包含小數點，若是不含小數點，則以字符串讀取，若是含小數點，則轉換爲Double類型的字符串
                                    if (temp.indexOf(".") > -1) {
                                        singleRow[column] = String.valueOf(new Double(temp)).trim();
                                    } else {
                                        singleRow[column] = temp.trim();
                                    }
                                }
                                
                                break;
                            case Cell.CELL_TYPE_STRING:
                                singleRow[column] = cell.getStringCellValue().trim();
                                break;
                            default:
                                singleRow[column] = "";
                                break;
                        }
                    }
                   list.add(singleRow);
                }
                map.put(numSheet, list);
            }
            
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return map;
    }  

    //寫入xls
    public static void writeXls(String fileName,Map<Integer,List<String[]>> map) {
        try {
            HSSFWorkbook wb = new HSSFWorkbook();
            for(int sheetnum=0;sheetnum<map.size();sheetnum++){
                HSSFSheet sheet = wb.createSheet(""+sheetnum);
                List<String[]> list = map.get(sheetnum);
                for(int i=0;i<list.size();i++){
                    HSSFRow row = sheet.createRow(i);
                    String[] str = list.get(i);
                    for(int j=0;j<str.length;j++){
                        HSSFCell cell = row.createCell(j);
                        cell.setCellValue(str[j]);    
                    }
                }
            }
            FileOutputStream outputStream = new FileOutputStream(fileName);
            wb.write(outputStream);
            outputStream.close();
        } catch (FileNotFoundException e) {
            // TODO 自動生成的 catch 塊
            e.printStackTrace();
        } catch (IOException e) {
            // TODO 自動生成的 catch 塊
            e.printStackTrace();
        }
    }
    
}