utiltool.java

java编写的监控一个文件夹里面有没有新的excel文件放入

/**
 * 
 */
package com.justin.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * @author Justin
 * 
 */
public class UtilTool {
	//文件复制
	public static void copyFile(String inFilePath, String outFilePath)
			throws IOException {
		FileInputStream fin = null;
		RandomAccessFile fout = null;
		try {
			fin = new FileInputStream(inFilePath);
			fout = new RandomAccessFile(outFilePath, "rw");

			FileChannel in = fin.getChannel();
			FileChannel out = fout.getChannel();

			MappedByteBuffer input = in.map(FileChannel.MapMode.READ_ONLY, 0,
					in.size());
			MappedByteBuffer output = out.map(FileChannel.MapMode.READ_WRITE,
					0, in.size());

			output.put(input);
		} finally {
			try {
				if (fin != null)
					fin.close();
			} catch (IOException ex) {
			}
			try {
				if (fout != null)
					fout.close();
			} catch (IOException ex) {
			}
		}
	}
	//获取指定格式的当前时间
	//"yyyy-MM-dd HH:mm:ss"
	public static String getCurTime(String timeFormat) {
		Date date = new Date();
		SimpleDateFormat dateFormat = new SimpleDateFormat(timeFormat);
		return dateFormat.format(date);
	}
	
	//重命名文件，path是文件所在的文件夹路径
	public static boolean renameFile(String path, String fromName, String toName){			 
		return new File(path + File.separator + fromName).renameTo(new File(path + File.separator + toName));
	}
	
	
	//测试方法
	/*	
	public static void main(String[] args) {

		try {
			copyFile("D:\\ExcelFile\\test1.xls", "E:\\xu.xls");
			System.out.println("successful");
		}
		catch (IOException ex){
			System.err.println(ex);
		}
			
	}
	 */	
}