用资料类实现复制功能

用文件类实现复制功能

/*
* couter:苏奕祥
* 实现两个文件的复制功能并且用到正则表达式替换复制完后的值
*
*/
import java.io.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class CopyFile {
public static void main(String[] args) throws IOException{
File f=new File( "E:\\sdx.txt" );
File f2=new File( "E:\\sdxcopy.txt" );
Writer copy=new FileWriter(f2);
Writer aaa=null ;
aaa=new FileWriter(f);
aaa.write("I LOVE U I LOVE U I LOVE U\r\nI LOVE U I LOVE U I LOVE U\r\nI LOVE U I LOVE U I LOVE U" );
aaa.close();
Reader read=null ;
read=new FileReader(f);
char c[]= new char [ 1024 ];
int len=read.read(c);
System.out.println(len);
[color=blue][/color] read.close();
String str=new String(c, 0 ,len);
System.out.println("内容为：" +str);
Pattern p=Pattern.compile("LOVE" );
Matcher m=p.matcher(str);
String str2=m.replaceAll("HATE" );
System.out.println(str2);
copy.write(str2);
copy.close();
}
}