JAVA操作excel文件-----using jxl

java只能处理以xls结尾的excel文件，所以处理excel时，必须先把excel文件另存为.xls文件。

以下例子功能，对excel中所以cell进行判断。把cell中的回车符号转换为空格。
帮同事写的一个小工具。

package com.jun.xie;

import java.io.File;
import java.io.IOException;

import jxl.Cell;
import jxl.Workbook;
import jxl.read.biff.BiffException;
import jxl.write.Label;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
import jxl.write.biff.RowsExceededException;

public class ClearEnter {
	
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		ClearEnter test = new ClearEnter();
		String path = "C:\\01\\test";
		File file = new File(path);
		File[] filelist = test.getFilelist(file);
		for (File newfile : filelist) {
			if (newfile.getName().endsWith("xls")) {
				System.out.println(newfile.getName() + " is a xls file");
				System.out.println("--start--");
				test.doFile(newfile);
				System.out.println("--end--");
			}
		}
	}

	private File[] getFilelist(File file) {
		File[] list = null;
		if (file.isDirectory()) {
			list = file.listFiles();
		}
		return list;
	}

	private void doFile(File file) {
		try {
			Workbook wb = Workbook.getWorkbook(file);
			// 打开一个文件的副本，并且指定数据写回到原文件
			WritableWorkbook book = Workbook.createWorkbook(file, wb);
			
			//循环编列sheet
			for (int i = 0; i < book.getSheets().length; i++) {
				WritableSheet sheet = book.getSheet(i);
				
				//双重循环编列cell
				for (int j = 0; j < sheet.getColumns(); j++) {
					for (int k = 0; k < sheet.getRows(); k++) {
						//取出cell中的值
						Cell cell1 = sheet.getCell(j, k);
						String result = cell1.getContents();
						
						//把所有的回车符号转换为空格,并且重新写入到原来的cell中
						if (result.indexOf("\n") != -1) {
							System.out.println("hi");
							System.out
									.println("sheet name: " + sheet.getName());
							System.out.println("第" + (k + 1) + "行  ---" + "第"
									+ (j + 1) + "列进行了修改");
							result = result.replaceAll("\n", " ");
							try {
								sheet.addCell(new Label(j, k, result));
							} catch (RowsExceededException e) {
								System.out.println("---------");
								e.printStackTrace();
							} catch (WriteException e) {
								System.out.println("-+++++++++-");
								e.printStackTrace();
							}
						} else {
							continue;
						}
					}
				}
			}
			book.write();
			book.close();
		} catch (BiffException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}