java控制台实现学生信息管理系统(集合版)

public class Student {
 private String stuNo;
 private String name;
 private int age;
 public Student() {
  super();
  // TODO Auto-generated constructor stub
 }
 public Student(String stuNo, String name, int age) {
  super();
  this.stuNo = stuNo;
  this.name = name;
  this.age = age;
 }
 public String getStuNo() {
  return stuNo;
 }
 public void setStuNo(String stuNo) {
  this.stuNo = stuNo;
 }
 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;
 }
 @Override
 public int hashCode() {
  final int prime = 31;
  int result = 1;
  result = prime * result + age;
  result = prime * result + ((name == null) ? 0 : name.hashCode());
  result = prime * result + ((stuNo == null) ? 0 : stuNo.hashCode());
  return result;
 }
 @Override
 public boolean equals(Object obj) {
  if (this == obj)
   return true;
  if (obj == null)
   return false;
  if (getClass() != obj.getClass())
   return false;
  Student other = (Student) obj;
  if (age != other.age)
   return false;
  if (name == null) {
   if (other.name != null)
    return false;
  } else if (!name.equals(other.name))
   return false;
  if (stuNo == null) {
   if (other.stuNo != null)
    return false;
  } else if (!stuNo.equals(other.stuNo))
   return false;
  return true;
 }
 @Override
 public String toString() {
  return "学生：学号 " + stuNo + ", 姓名 " + name + ", 年龄 " + age ;
 }
 
}

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import java.util.Scanner;

public class StudentDAO {
 static List<Student> list = new ArrayList<>();
 static String ig = "1000";
 Scanner sc = new Scanner(System.in);

 // 增加学生信息
 public void add(List<Student> list) {
  int ig = Integer.parseInt(this.ig);
  while (true) {
   System.out.println(ig);

   System.out.println("请输入你要添加的学号为" + ig + "的学生的姓名");
   String name = sc.next();

   while (true) {
    System.out.println("请输入你要添加的学号为" + ig + "的学生的年龄");
    Scanner sc1 = new Scanner(System.in);
    if (sc1.hasNextInt()) {
     int age = sc1.nextInt();
     list.add(new Student(String.valueOf(ig), name, age));
     break;
    } else {
     System.out.println("请正确输入");
     continue;
    }
   }
   System.out.println("学号为" + ig + "的学生信息添加成功");
   ig++;
   this.ig = String.valueOf(ig);
   System.out.println("添加信息后,学生的信息为：");
   query(list);
   System.out.println("是否继续执行添加操作(y/n)");
   String result = sc.next();
   if (result.equalsIgnoreCase("n") || result.equalsIgnoreCase("y")) {
    if (result.equalsIgnoreCase("n")) {
     break;
    }
   }

  }
 }

 // 删除学生信息
 public void del(List<Student> list) {
  if (list.size() != 0) {
   a: while (true) {
    query(list);
    System.out.println("请输出你要删除的学生的学号");
    String str = sc.next();
    Iterator<Student> it = list.iterator();
    while (it.hasNext()) {
     Student stu = it.next();

     if (stu.getStuNo().equals(str)) {
      it.remove();
      System.out.println("删除成功!");
      System.out.println("删除操作后,学生的信息为：");
      query(list);
      break a;// 跳出到指定循环外
     }

    }
    System.out.println("查无此人……请查证后重新输入");
   }
  } else {
   System.out.println("还没有添加学生信息，快去添加学生信息吧");
  }
 }

 // 修改学生信息
 public void update(List<Student> list) {
  if (list.size() != 0) {
   a: while (true) {
    query(list);
    System.out.println("请输入要修改学生的学号：");
    String stuNo = sc.next();
    ListIterator<Student> lit = list.listIterator();
    while (lit.hasNext()) {
     Student stu = lit.next();
     if (stu.getStuNo().equals(stuNo)) {
      System.out.println("请输入您要修改的学生的姓名");
      String name = sc.next();
      System.out.println("请输入您要修改的学生的年龄");
      if (sc.hasNextInt()) {
       int age = sc.nextInt();
       stu.setName(name);
       stu.setAge(age);
       System.out.println("修改操作后,学生的信息为：");
       query(list);
       break a;
      } else {
       System.out.println("请正确输入年龄");
      }
     } 
    }
    System.out.println("查无此人……请查证后重新输入");
   }
  } else {
   System.out.println("还没有添加学生信息，快去添加学生信息吧");
  }

 }

 // 查询学生信息
 public void query(List<Student> list) {
  if (list.size() != 0) {
   System.out.println("=============学生信息==============");
   for (Student stu : list) {
    System.out.println(stu);
   }
   System.out.println("=================================");
  } else {
   System.out.println("还没有添加学生信息，快去添加学生信息吧");
  }
 }
}

import java.util.Scanner;


public class StudentManager {
 public static void main(String[] args) {
  while (true) {
   Scanner sc = new Scanner(System.in);
   System.out.println();
   System.out.println();
   System.out.println("=================================");
   System.out.println("=========欢迎使用学生管理系统 =========");
   System.out.println("=========请选择您要进行的操作 =========");
   System.out.println("=        1 添加学生信息                                 =");
   System.out.println("=        2 删除学生信息                                 =");
   System.out.println("=        3 修改学生信息                                 =");
   System.out.println("=        4 查询学生信息                                 =");
   System.out.println("=        5 退出系统                                         =");
   System.out.println("==================================");
   System.out.println("请输入您的选择");
   int choose;
   if (sc.hasNextInt()) {
    choose = sc.nextInt();
    if (choose > 0 && choose < 6) {
     Student st = new Student();
     StudentDAO std = new StudentDAO();
     switch (choose) {
     case 1:
      std.add(std.list);
      break;
     case 2:
      std.del(std.list);
      break;
     case 3:
      std.update(std.list);
      break;
     case 4:
      std.query(std.list);
      break;
     case 5:
      System.out.println("成功退出……");
      System.out.println("欢迎下次使用");
      System.exit(0);
      break;
     }
    } else {
     System.out.println("请正确输入");
    }

   } else {
    System.out.println("请您输入正确的选项");
   }
  }
 }
}