BufferedReader

import java.lang.*;
import java.util.*;
import java.io.*;
public class buff{
public static void main(String args[]) throws Exception{

FileInputStream fis = new FileInputStream("D://cola//Test2.java");
InputStreamReader isr =new InputStreamReader(fis);
//读缓冲区
BufferedReader buffr = new BufferedReader(isr);
String s = null;
while(true){
s=buffr.readLine();
System.out.println(s);
if(s==null)
break;
}
}
}