FileManager.java

package com.cheng.zenofdesignpatterns.perfectworld.command_chain.command_name.os;

/**
 *
 */
public class FileManager {

    // ls命令
    public static String ls(String path) {
        return "file1\nfile2\nfile3\nfile4";
    }

    // ls -l命令
    public static String ls_l(String path) {
        String str = "drw-rw-rw    root    system    1024   2009-8-20 10:23   file1\n";
        str = str + "drw-rw-rw    root    system    1024   2009-8-20 10:23   file2\n";
        str = str + "drw-rw-rw    root    system    1024   2009-8-20 10:23   file3";
        return str;
    }

    // ls -a命令
    public static String ls_a(String path) {
        String str = ".\n..\nfile1\nfile2\nfile3";
        return str;
    }

}