文本文件a.txt的内容以倒序的方式输出

package hello;
import java.io.*;
public class FileReverse {
File ifile;
FileReverse(String fname)throws IOException {
ifile=new File(fname);
}
public void reverse() {
int c;
FileInputStream fin;
FileOutputStream fout;
BufferedReader br;
BufferedWriter bw;
StringBuffer strbuf=new StringBuffer();
try{
fin = new FileInputStream(ifile);
br = new BufferedReader(new InputStreamReader(fin,"GB2312"));
while((c=br.read())!=-1) {
strbuf.append((char)c);
}
br.close();
fin.close();
fout = new FileOutputStream(ifile);
bw = new BufferedWriter(new OutputStreamWriter(fout,"GB2312"));
for(int j=strbuf.length()-1;j>=0;j--){
bw.write(strbuf.charAt(j));
System.out.println(String.valueOf(strbuf.charAt(j)));
}
bw.close();
fout.close();
}
catch(FileNotFoundException e){
System.err.println("io:"+e.getMessage());
}
catch (IOException e) {
System.err.println("io:"+e.getMessage());
}
}
public static void main(String []args) {
try{
FileReverse fc=new FileReverse("e:\\hello.txt");
fc.reverse();
}
catch(FileNotFoundException e){
System.err.println("io:"+e.getMessage());
}
catch (IOException e) {
System.err.println("io:"+e.getMessage());
}
}
}