该楼层疑似违规已被系统折叠 隐藏此楼查看此楼

import java.util.HashMap;import java.util.Map;import java.util.Scanner;

public class demo {public static void main(String[] args) {

Scanner in = new Scanner(System.in);

Bool bool = new Bool();

int op;

do {

// 首页方法

System.out.println("学生成绩管理系统");

System.out.println("1,增加记录\n2,查看记录\n3,统计记录\n4,删除记录\n5,修改记录\n6,退出");

System.out.println("请选择(1-6)");

op = in.nextInt();

bool.login(op);

} while (op != 6);

}

}

class Bool {

Map maps = new HashMap();

public void login(int op) {

switch (op)

{case 1:// 调用增加方法

insert();

break;

case 2:// 调用查询方法

select();

break;

}

}

public void insert() {

Scanner in = new Scanner(System.in);

System.out.println("你要增加几条记录");

int i = in.nextInt();

for (int j = 0; j < i; j++) {

Student st = new Student();

System.out.println("请输入学号");

int number = in.nextInt();

st.setNumber(number);

if (maps.get(number) != null) {

System.out.println("学好重复了。请重新输入");

--j;

continue;

}

System.out.println("请输入姓名");

String name = in.next();

st.setName(name);

System.out.println("请输入成绩");

String score = in.next();

st.setScore(score);

maps.put(st.getNumber(), st);

}

System.out.println("增加成功" + i + "条记录");

}

public void select() {

// 查询记录方法

Scanner in = new Scanner(System.in);

System.out.println("因为姓名有重复，不建议使用，唯有id不重复所以!!!!请输入学号");int k = in.nextInt();

System.out.println("name:" + maps.get(k).getName() + "score:" + maps.get(k).getScore());}

}

// 学生对象

class Student {

// 学号

private int number;

// 姓名

private String name;

// 分数

private String score;

public Student() {}

public Student(int number, String name, String score) {

this.number = number;

this.name = name;

this.score = score;

}

public int getNumber() {return number;}

public void setNumber(int number) {this.number = number;}

public String getName() {return name;}

public void setName(String name) {this.name = name;}

public String getScore() {return score;}

public void setScore(String score) {this.score = score;}

}