/** * @time  2014-8-15 下午05:00:58 * @author new * @function 通过bufferedReader和bufferedWriter 拷贝文件 *  */package com.neusoft.copyfile;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;/** *  */public class CopyFileByBuffer {	/**	 * @param args	 * @throws Exception 	 */	public static void main(String[] args) throws Exception {				String oldFileName="hs_err_pid3420.log";		String newFileName="copy_"+oldFileName;		CopyFileByBuffer cfBuffer=new CopyFileByBuffer();		cfBuffer.CopyFile(oldFileName, newFileName);		System.out.println("结束");	}		/**	 * @function 通过bufferedReader和bufferedWriter 拷贝文件	 * @param oldFileName	 * @param newFileName	 * @throws IOException	 */	public void  CopyFile(String oldFileName,String newFileName) throws IOException{		//读文件     hs_err_pid3420.log		File oldFile=new File(oldFileName);		//写文件		File newFile=new File(newFileName);		FileReader fReader=new FileReader(oldFile);		BufferedReader bReader =new BufferedReader(fReader);				FileWriter newFWrite=new FileWriter(newFile);		BufferedWriter bWriter=new BufferedWriter(newFWrite);				String s=null;		while ((s=bReader.readLine())!=null) {			System.out.println(s);			bWriter.write(s);			bWriter.newLine();			bWriter.flush();		}		if (bWriter!=null) {			bWriter.close();		}		if (bReader!=null) {			bReader.close();		}		System.out.println("复制文件成功");	}}

只要修改文件路径为你的文件路径,就可以实现复制功能了