java读入文件

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;

public static void (String[] args) throws IOException {
	String line;
	FileInputStream fis = null;
	try {
	fis = new FileInputStream("filename"); 
	InputStreamReader isr = new InputStreamReader(fis);
	BufferedReader br = new BufferedReader(isr);

	while ((line = br.readLine()) != null) {
		// file operation
	     }
	}
	catch (IOException exception) {
	exception.printStackTrace();
	}
	finally {
	     if(fis != null)
	          fis.close();
	}
}