Java班级管理系统
初学Java的萌新 人气:0本文为大家分享了Java实现班级管理系统的具体代码,供大家参考,具体内容如下
需求:班级管理系统
功能:对学生的信息进行管理
1 登录系统 2 退出系统
账号:
密码:
验证码
-----欢迎来到班级管理系统-----
1 添加学生信息:
2 删除学生信息
3 查找指定学生信息:
4 查找所有学生信息
5 统计班级信息
6 退出
请选择您要查询的序号:
建立一个Student类:
public class Student { private String sid; // 学号 private String name; // 姓名 private int age; // 年龄 private String sex; // 性别 private String brithday; // 生日 private String constellation; // 星座 private String message; // 查看班级信息 public Student(){ } public Student(String sid, String name, int age, String sex, String brithday, String constellation, String message) { this.sid = sid; this.name = name; this.age = age; this.sex = sex; this.brithday = brithday; this.constellation = constellation; this.message = message; } public String getSid() { return sid; } public void setSid(String sid) { this.sid = sid; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; } public String getBrithday() { return brithday; } public void setBrithday(String brithday) { this.brithday = brithday; } public String getConstellation() { return constellation; } public void setConstellation(String constellation) { this.constellation = constellation; } public String getMessage(){ return message; } public void setMessage(String message){ this.message = message; } }
在建立一个测试类StudentDemo:
1.先实现界面
public static void main(String[] args) { ArrayList<Student> list = new ArrayList<>(); Scanner sc = new Scanner(System.in); Random random = new Random(); // 登录系统 lo: while(true){ System.out.println("1 登录系统" + " " + "2 退出系统"); String count = sc.next(); switch(count){ case "1": //输入账号密码 int num = 0; for (int i = 0; i < 3; i++) { System.out.println("请输入管理员账号:"); String uesr = sc.next(); System.out.println("请输入管理员密码:"); String password = sc.next(); // 验证码 String code = "1234567890zxcvbnmlkjhgfdsaqwertyuiopZMXNCBVLAKSJDHFGQPWOEIRUTY"; StringBuilder ss= new StringBuilder(); int number = code.length(); for (int j = 0; j < 4; j++) { int a = random.nextInt(number); char ch = code.charAt(a); ss.append(ch); } while (true){ System.out.println("请输入验证码:" + ss); String Code = sc.next(); System.out.print("验证码:" + Code); if(Code.equalsIgnoreCase(ss.toString())){ System.out.println("验证成功!"); break; }else{ System.out.println("您输入的有误,请重新输入!"); } } if(uesr.equals("admin") && password.equals("123456")){ System.out.println("登录成功!"); break lo; }else{ num++; if(num < 3){ System.out.println("您输入的账号或密码错误,请重新输入!"); }else{ System.out.println("您已连续三次输入错误,请24小时以后再次尝试!"); return; } } } case "2": return; default: System.out.println("您输入的有误,请重新输入!"); break; } } // 登录界面 Scanner s = new Scanner(System.in); la: while(true){ System.out.println("-----欢迎来到班级管理系统-----"); System.out.println("1 添加学生信息:"); System.out.println("2 删除学生信息"); System.out.println("3 查找指定学生信息:"); System.out.println("4 查找所有学生信息"); System.out.println("5 统计班级信息"); System.out.println("6 退出"); System.out.println("请选择您要查询的序号:"); // 选择要执行的代码块 String num = sc.next(); switch(num){ case "1": // System.out.println("1 添加学生信息:"); addStudent(list); break; case "2": // System.out.println("2 删除学生信息"); deleteStudent(list); break; case "3": // System.out.println("3 查找指定学生信息:"); locatingStudent(list); break; case "4": // System.out.println("4 查找所有学生信息"); setStudent(list); break; case "5": // System.out.println("5 统计班级信息"); printMessage(list); break; case "6": System.out.println("退出"); break la; default: System.out.println("您输入的有误请重新输入!"); break; } } }
2.建立一个判断系统中是否存在学生的类
// 判断学生是否存在 public static int getIndex(ArrayList<Student> list,String sid){ int index = -1; // 无信息 for (int i = 0; i < list.size(); i++) { Student stu = list.get(i); String id = stu.getSid(); if(id.equals(sid)){ index = i; // 学生的索引位置 } } return index; }
3.添加学生
//添加学生 public static void addStudent(ArrayList<Student> list) { Scanner sc = new Scanner(System.in); String sid; while(true){ System.out.println("请输入学号"); sid = sc.next(); int index = getIndex(list,sid); if(index == -1){ break; }else{ System.out.println("您输入的学号已存在,请重新输入!"); } } System.out.println("请输入您的姓名:"); String name = sc.next(); System.out.println("请输入您的年龄:"); int age = sc.nextInt(); System.out.println("请输入您的性别:"); String sex = sc.next(); System.out.println("请输入您的生日:"); String brithday = sc.next(); System.out.println("请输入您的小组:"); String groud = sc.next(); System.out.println("请输入您的星座:"); String constellation = sc.next(); Student stu = new Student(sid,name,age,sex,brithday,groud,constellation); list.add(stu); System.out.println("添加成功!"); }
4.删除学生
// 删除学生 public static void deleteStudent(ArrayList<Student> list) { Scanner sc = new Scanner(System.in); System.out.println("请输入您要删除的学号:"); String sid = sc.next(); int index = getIndex(list,sid); if(index == -1){ System.out.println("您输入的学生号不存在!"); return; }else{ list.remove(index); System.out.println("删除成功!"); } }
5.查找指定学生信息
// 查找指定学生 public static void locatingStudent(ArrayList<Student> list) { Scanner sc = new Scanner(System.in); System.out.println("请输入您要查找的学号:"); String sid = sc.next(); Student stu = new Student(); int index = getIndex(list,sid); if(index == -1){ System.out.println("无信息,请添加信息之后在查找!"); return; }else{ for (int i = 0; i < list.size(); i++) { Student a = list.get(i); System.out.println("学号:" + a.getSid()); System.out.println("姓名:" + a.getName()); System.out.println("年龄:" + a.getAge()); System.out.println("性别:" + a.getSex()); System.out.println("生日:" + a.getBrithday()); System.out.println("星座:" + a.getConstellation()); } } }
6.查找所有学生信息
// 查找所有学生信息 public static void setStudent(ArrayList<Student> list) { int s = list.size(); if(s == 0){ System.out.println("暂无信息,请添加以后再次查询!"); return; } System.out.println("学号\t姓名\t年龄\t性别\t生日\t星座"); for (int i = 0; i < list.size(); i++) { Student stu = list.get(i); System.out.println(stu.getSid() + "\t" + stu.getName() + "\t" + stu.getAge() +"\t" + stu.getSex() + "\t" + stu.getBrithday() + "\t" + stu.getConstellation()); } }
7.统计班级的信息
// 统计班级信息 public static void printMessage(ArrayList<Student> list) { // 多少人,男女, int count = 0; int total = list.size(); for (int i = 0; i < list.size(); i++) { Student stu = list.get(i); if(stu.getSex().equals("男")){ count++; } } System.out.println("班级有:" + total + "人"); System.out.println("班级男生有:" + count + "人"); System.out.println("班级女生有:" + (total - count) + "人"); }
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