标签：令行 load count top substr png 自己 file while
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Scanner;
public class 命令模拟 {
static String basePath = "C:/Users/zhangli/Desktop";
public static void main(String[] args) {
try {
basePath = args[0];
} catch (Exception e) {
// System.out.println("没有命令行参数，所以取初始值：C:/Users/zhangli");
}
Scanner in = new Scanner(System.in);
while (true) {
System.out.print(basePath + ">");
String cmd = in.nextLine();
switch (cmd) {
case "mytime":
System.out.println(fetchCurrentTime());
break;
case "mydir":
System.out.println(showDirInfos());
break;
case "mytree":
printTree(new File(basePath), 0);
break;
case "myhelp":
System.out.println(fetchCmdHelpInfo());
break;
case "quit":
System.exit(0);
break;
case "exit":
System.exit(0);
break;
default:
if (cmd.startsWith("mycd")) {
changeDirectory(cmd);
} else if (cmd.startsWith("mycalendar")) {
System.out.println(showCalendar(cmd));
} else if (cmd.startsWith("myremove")) {
delete(cmd);
} else {
System.out.println("非法命令或者请求，请重新输入！");
}
break;
}
}
}
private static String showCalendar(String cmd) {
StringBuffer sb = new StringBuffer(64);
String[] cs = cmd.split("\\s+");
if (cs.length == 1) {
int year = Calendar.getInstance().get(Calendar.YEAR);
int month = Calendar.getInstance().get(Calendar.MONTH) + 1;
return year + "年" + month + "月\n"
+ printCalendarThisMonth(year, month);
} else if (cs.length == 2) {
int year = Integer.parseInt(cs[1]);
for (int i = 1; i <= 12; i++) {
sb.append(year + "年" + i + "月\n"
+ printCalendarThisMonth(year, i));
}
return sb.toString();
} else if (cs.length == 3) {
int year = Integer.parseInt(cs[1]);
int month = Integer.parseInt(cs[2]);
return year + "年" + month + "月\n"
+ printCalendarThisMonth(year, month);
}
return "输入参数个数或者类型错误，请重新输入！";
}
private static String showDirInfos() {
StringBuffer sb = new StringBuffer(32);
File f = new File(basePath);
File[] fs = f.listFiles();
sb.append(
new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date(f
.lastModified()))).append("\t<DIR>\t").append(".\n");
sb.append(
new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date(f
.lastModified()))).append("\t<DIR>\t").append("..\n");
for (int i = 0; i < fs.length; i++) {
if (!fs[i].isHidden()) {
sb.append(
new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
.format(new Date(fs[i].lastModified())))
.append("\t");
sb.append(fs[i].isDirectory() ? "<DIR>\t" : "\t");
sb.append(fs[i].getName()).append("\n");
}
}
return sb.toString();
}
private static void changeDirectory(String cmd) {
String[] cmds = cmd.split("\\s+");
if (cmds.length == 1) {
return;
} else {
String destPath = cmds[1];
if (".".equals(destPath)) {
} else if ("..".equals(destPath)) {
String[] paths = basePath.split("/");
StringBuffer temp = new StringBuffer(32);
for (int i = 0; i < paths.length - 1; i++) {
temp.append(paths[i]).append("/");
}
basePath = temp.substring(0, temp.length() - 1).toString();
} else {
// 如果给出的是相对路径
String temp = basePath + "/" + destPath;
if (new File(temp).exists()) {
basePath = basePath + "/" + destPath;
} else if (new File(destPath).exists()) {
basePath = destPath;
} else {
System.out.println("非法路径，请重新输入！");
}
}
}
}
private static String fetchCmdHelpInfo() {
StringBuffer sb = new StringBuffer(64);
// System.out.println("\t mytime 获取当前时间");
sb.append("命令提示信息如下：\n");
sb.append("\t mytime 获取当前时间\n");
sb.append("\t myhelp 获取命令提示\n");
sb.append("\t mycd 切换目录\n");
sb.append("\t mycalendar 打印日历\n");
sb.append("\t mydir 显示目录信息\n");
sb.append("\t mytree 显示目录所有文件信息\n");
sb.append("\t exit/quit 退出当前程序\n");
return sb.toString();
}
private static String fetchCurrentTime() {
String ret = new SimpleDateFormat("yyyy年MM月dd日 HH时mm分ss秒")
.format(new Date());
return ret;
}
public static String printCalendarThisMonth(int year, int month) {
StringBuffer sb = new StringBuffer(64);
int[] days = new int[42];
Calendar cal = Calendar.getInstance();
cal.set(Calendar.YEAR, year);
cal.set(Calendar.MONTH, month - 1);
cal.set(Calendar.DAY_OF_MONTH, 1);
int dayNuminThisMonth = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
int firstDay = cal.get(Calendar.DAY_OF_WEEK);
int day = 1;
for (int i = firstDay - 1; i < dayNuminThisMonth + firstDay - 1; i++) {
days[i] = day++;
}
sb.append("天\t一\t二\t三\t四\t五\t六\n");
for (int i = 0; i < days.length; i++) {
if (days[i] == 0) {
sb.append("\t");
} else {
sb.append(days[i] + "\t");
}
if ((i + 1) % 7 == 0) {
sb.append("\n");
}
}
return sb.toString();
}
public static void printTree(File f, int level) {
System.out.println(printStr("\t", level) + f.getName());
File[] fs = null;
if (f.isDirectory() && ((fs = f.listFiles()) != null)) {
for (int i = 0; i < fs.length; i++) {
printTree(fs[i], level + 1);
}
}
}
public static void delete(String cmd)
{
String[] cmds = cmd.split("\\s+");
if(cmds.length==1)
{
System.out.println("请输入当前路径下所要删除的文件名");
}
else if(cmds.length==2)
{
if(new File(basePath+"/"+cmds[1]).exists())
{
removeDir(new File(basePath+"/"+cmds[1]));
}
else
{
System.out.println("请输入当前路径下所要删除的文件名");
}
}
}
public static void removeDir(File f) {
if (f.isDirectory()) {
File[] fs = f.listFiles();
for (int i = 0; i < fs.length; i++) {
removeDir(fs[i]);
}
}
f.delete();
}
public static String printStr(String str, int count) {
StringBuffer sb = new StringBuffer(32);
for (int i = 0; i < count; i++) {
sb.append(str);
}
return sb.toString();
}
}
标签：令行 load count top substr png 自己 file while
原文地址：https://www.cnblogs.com/alichengxuyuan/p/12578006.html
