周末答题拿技术分活动! 第二弹 - 黑马程序员技术交流社区

/*
*花了好多时间考虑，写了几遍，调试了也不知道多少次。
*第一遍不是通过控制器的方式，是在主函数中按照面向过程的方式写的，但是觉得这样写不怎么好，
*然后突然想起以前见到的使用一个整型数来代表界面，然后又开始从新写了一遍。
*目前没有学集合，要储存不确定的用户数量是一个难题，于是后来想要通过字符串拼接的方式，
*是我目前能想到的最好的方法了。
*功能基本实现了！如遇BUG请反馈！！！
*具体注释我就不写了，大致的注释就简单的写了一些。
*/
import java.util.Scanner;
import java.io.*;
class LiHuan {
public static int control = 0; //定义控制器参数
public static int countUser = 0; //统计用户数量
public static String[] userInfo = new String[3]; //存储当前登录的用户信息
public static String userList = "#"; //存储所有用户数据
public static Scanner sc = new Scanner(System.in);
public static void main(String[] args) throws IOException {
while (true) { //无限循环，根据控制器的参数进行操作
if (control == -1) {
break;
} else {
control();
}
}
}
public static void control() throws IOException {
switch (control) {
case 0: //主界面
iMain();
break;
case 1: //注册界面
iRegister();
break;
case 2: //登录界面
iLogin();
break;
case 3: //用户界面
iUser();
break;
default: //默认界面
control = -1;
break;
}
}
public static void iMain() { //主界面函数
System.out.println("------------------------------------");
System.out.println("----------欢迎来到黑马论坛----------");
System.out.println("-----------本站共有0名用户----------");
System.out.println("0.退出");
System.out.println("1.注册");
System.out.println("2.登录");
while(true) {
System.out.println("\r\n请选择你想要的操作选项：");
String str = sc.nextLine();
if (str.equals("0") || str.equals("1") || str.equals("2")) { //不能使用==
switch (str) {
case "0":
control = -1;
break;
case "1":
control = 1;
break;
case "2":
control = 2;
break;
default:
control = -1;
break;
}
break;
} else {
System.out.println("<---你操作错误，请重新输入选项！--->");
System.out.println("------------------------------------");
}
}
}
public static void iRegister() { //注册界面函数
String userName;
String passWord;
System.out.println("------------------------------------");
System.out.println("----------欢迎来到注册页面----------");
while (true) {
System.out.println("输入你要注册的帐号：");
userName = sc.nextLine().toLowerCase();
if (!userList.contains(userName)) {
while (true) {
System.out.println("请输入你要注册的密码：");
passWord = sc.nextLine();
if (passWord.matches("[a-zA-Z0-9_]{6,20}")) {
userList += (userName + "," + passWord + ",0#");
countUser++;
control = 0;
System.out.println("注册成功！");
break;
} else {
System.out.println("<---密码只能为英文字母大小写、数字以及下划线，且密码长度在6-20之间！--->");
System.out.println("------------------------------------");
}
}
break;
} else {
System.out.println("<-你输入的帐号已存在，请重新尝试！->");
System.out.println("------------------------------------");
control = 0;
break;
}
}
}
public static void iLogin() { //登录界面函数
if (countUser == 0) {
control = 1;
return;
} else {
System.out.println("------------------------------------");
System.out.println("----------欢迎来到登录界面----------");
System.out.println("--------------请按1返回-------------");
System.out.println("--------------请按2继续-------------");
while (true) {
String tempSelect = sc.nextLine();
if (tempSelect.equals("1")) {
control = 0;
break;
} else if (tempSelect.equals("2")) {
while (true) {
System.out.println("请输入账号：");
String userNameTemp = sc.nextLine();
System.out.println("请输入密码：");
String passWordTemp = sc.nextLine();
if (userList.contains("#" + userNameTemp + "," + passWordTemp + ",0#")) {
setUserInfo(userNameTemp, passWordTemp, "0");
break;
} else if (userList.contains("#" + userNameTemp + "," + passWordTemp + ",1#")) {
setUserInfo(userNameTemp, passWordTemp, "1");
break;
} else {
System.out.println("<------------登录失败！------------->\r\n");
control = 0;
break;
}
}
break;
} else {
System.out.println("<------------输入有误！------------>");
System.out.println("------------------------------------");
control = 0;
break;
}
}
}
}
public static void setUserInfo(String userName, String passWord, String isVip) { //设置当前登录用户信息
System.out.println("登陆成功！");
control = 3;
userInfo[0] = userName;
userInfo[1] = passWord;
userInfo[2] = isVip;
}
public static void iUser() throws IOException { //用户界面函数
System.out.println("------------------------------------");
System.out.print("欢迎" + userInfo[0]);
if (userInfo[2].equals("1")) {
System.out.println("会员!");
} else {
System.out.println("游客!");
}
System.out.println("欢迎使用以下服务：");
switch (userInfo[2]) {
case "0":
System.out.println("1.升级会员服务！");
System.out.println("2.返回登录界面！");
System.out.println("3.返回注册界面！");
System.out.println("4.返回主界面！");
break;
case "1":
System.out.println("1.打印会员信息！");
System.out.println("2.撤销会员服务！");
System.out.println("3.返回登录界面！");
System.out.println("4.返回注册界面！");
System.out.println("5.返回主界面！");
break;
}
String selectOperater = sc.nextLine() + userInfo[2];
switch (selectOperater) { //通过在用户输入的选项后面加入0或1来加以判断用户是游客还是会员操作的操作
case "10":
String securityCode = securityCode() + "";
System.out.println("------------------------------------");
System.out.println("请输入验证码确认操作：" + securityCode);
String inputCode = sc.nextLine();
if (inputCode.equals(securityCode)) {
changeVip();
} else {
System.out.println("<--------输入的验证码有误！-------->");
System.out.println("------------------------------------");
control = 3;
}
break;
case "20":
case "31":
control = 2;
break;
case "30":
case "41":
control = 1;
break;
case "40":
case "51":
control = 0;
break;
case "11":
printUserInfo();
break;
case "21":
changeVip();
break;
default:
control = 0;
break;
}
}
public static void changeVip() { //修改用户会员信息
StringBuilder sb = new StringBuilder(userList);
if (userInfo[2].equals("0")) { //如果为0，即游客，则执行
userInfo[2] = "1";
int startIndex = userList.indexOf("#" + userInfo[0] + "," + userInfo[1] + ",0#");
int endIndex = ("#" + userInfo[0] + "," + userInfo[1] + ",0#").length() + startIndex;
userList = sb.replace(startIndex, endIndex, "#" + userInfo[0] + "," + userInfo[1] + ",1#").toString();
//userList.replace("#" + userInfo[0] + "," + userInfo[1] + ",0#", "#" + userInfo[0] + "," + userInfo[1] + ",1#");
} else if (userInfo[2].equals("1")) { //如果为1，即会员，则执行
userInfo[2] = "0";
int startIndex = userList.indexOf("#" + userInfo[0] + "," + userInfo[1] + ",1#");
int endIndex = ("#" + userInfo[0] + "," + userInfo[1] + ",1#").length() + startIndex;
userList = sb.replace(startIndex, endIndex, "#" + userInfo[0] + "," + userInfo[1] + ",0#").toString();
//userList.replace("#" + userInfo[0] + "," + userInfo[1] + ",1#", "#" + userInfo[0] + "," + userInfo[1] + ",0#");
} else {
control = 0;
System.out.println("<----------会员操作失败！---------->");
System.out.println("------------------------------------");
}
}
public static void printUserInfo() throws IOException { //打印用户信息
String printUserInfo = "用户帐号：" + userInfo[0] + "\r\n用户密码：" + userInfo[1];
if (userInfo[2].equals("1")) {
printUserInfo += "\r\n是否是会员：是";
} else {
printUserInfo += "\r\n是否是会员：否";
}
FileWriter fw = new FileWriter(userInfo[0] + ".txt");
fw.write(printUserInfo);
System.out.println("------------------------------------");
System.out.println("已完成会员信息打印！");
fw.close();
}
public static int securityCode() { //获取验证码
return (int)(Math.random() * 10000);
}
}

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