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();??????????????????}?????}