java怎么打开一个文件夹

import java.io.BufferedReader; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.IOException; public class OpenFile { public static void main(String args[]) { try { BufferedReader br = new BufferedReader(new FileReader("c://EmailSpider.java")); String line = ""; while((line=br.readLine()) != null) { System.out.println(line); } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }