文件读写2

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;


public class Filedemo2 {


public static void main(String[] args) {


File file = new File("test.txt");

try {

FileInputStream fis = new FileInputStream(file);//读文件流
FileOutputStream fos = new FileOutputStream("testw.txt");//写文件流

InputStreamReader isr = new InputStreamReader(fis);//字符流读
OutputStreamWriter osw = new OutputStreamWriter(fos);//字符流写

//缓冲区读写

BufferedReader br = new BufferedReader(isr);
// BufferedWriter bw = new BufferedWriter(osw);
PrintWriter pw = new PrintWriter(osw);//支持写换行
String input;
while ((input = br.readLine()) != null) {
// bw.write(input);
pw.println(input);
}
pw.flush();//强制缓冲区输出
// bw.close();
pw.close();
br.close();
osw.close();
fos.close();
isr.close();
fis.close();


} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}







}


}