用java写的一个（简易版的学生管理系统）

package demo04; import java.util.ArrayList; import java.util.Scanner; /** * @Classname : vision * @Description : TODO 视图层--展示数据 * @Author : lin_refuel@qq.com */ public class vision { public static int options() { System.out.println("************************************"); System.out.println(" * 学员管理系统（简易版）* "); System.out.println(" 1. 查询功能"); System.out.println(" 2. 添加学员信息"); System.out.println(" 3. 删除学员信息"); System.out.println(" 4. 修改某个学员的信息"); System.out.println(" 0. 退出程序"); System.out.println("************************************"); int a; do { System.out.println("请输入0-4，选中对应的功能"); a = new Scanner(System.in).nextInt(); }while (a < 0 || a > 4);//防止输入错误数字 return a; } public static int secondaryMenu() { System.out.println("************************************"); System.out.println(" 1. 查询整个列表"); System.out.println(" 2. 根据名字进行查询"); System.out.println(" 3. 根据学号进行查询"); System.out.println(" 4. 根据年龄进行查询"); System.out.println(" 5. 根据成绩进行查询"); System.out.println(" 6. 根据性别进行查询"); System.out.println("************************************"); int a; do { System.out.println("请输入1-6选择查询内容"); a = new Scanner(System.in).nextInt(); }while(a < 0 || a > 6); return a; } public static void show(ArrayList<Student> all) { // System.out.println("┌┬┐├┼┤└┴┘─│"); String []s ={"女","男"}; System.out.print("┌────┬────────────┬──────┬──────┬──────┐\n"); // System.out.printf("│─────┼────────────┼──────┼───────┼──────┼\n"); System.out.printf("│%-4s│%-12s│%-6s│%-6s│%-6s│\n","ID","NAME","AGE","SEX","SCORE"); // System.out.print("├────┼────────────┼──────┼──────┼──────┤\n"); for (Student SSS:all) { System.out.print("├────┼────────────┼──────┼──────┼──────┤\n"); System.out.printf("│%-4d│%-12s│%-6d│%-6s│%-6.1f│\n", SSS.getId(),SSS.getName(),SSS.getAge(),s[SSS.getSex()],SSS.getScore()); } // System.out.printf("│────┼────────────┼───────┼───────┼──────┼\n"); System.out.print("└────┴────────────┴──────┴──────┴──────┘\n"); } /** * 获取一个名字 * @return */ public static String getStudentname() { System.out.println("请输入一个名字"); return new Scanner(System.in).nextLine(); } /** * 获取一个学号 * @return */ public static int getID() { System.out.println("请输入一个学号"); return new Scanner(System.in).nextInt(); } public static int getage() { System.out.println("请输入一个年龄"); return new Scanner(System.in).nextInt(); } public static float getScore() { System.out.println("请输入一个成绩"); return new Scanner(System.in).nextFloat(); } public static int getsex() { System.out.println("情输入性别0或者1"); return new Scanner(System.in).nextInt(); } public static Student addLearners() { System.out.println("添加学员--不在添加新学员的姓名请输入over"); Scanner sc = new Scanner(System.in); System.out.println("请输入姓名"); String name = sc.nextLine(); if(name.equals("over")) return null; System.out.println("请输入年龄"); int age = sc.nextInt(); System.out.println("请输入性别0或1"); int sex = sc.nextInt(); System.out.println("请输入成绩"); float score = sc.nextFloat(); return new Student(name,age,sex,score); } public static int deleteStu() { System.out.println("请输入删除学员的学号"); return getID(); } public static void theDeletionSucceedsOrFails(boolean deleteLearnerInformation) { if(deleteLearnerInformation == true) System.out.println("删除成功"); else System.out.println("删除失败"); } public static void exitTheProgram() { System.out.println("程序退出"); } public static int modifyLearners() { System.out.println("修改信息，请输入修改学员的学号"); return getID(); } public static Student changesToInformation() { Scanner scanner = new Scanner(System.in); Scanner sc = new Scanner(System.in); System.out.println("请输入姓名"); String name = sc.nextLine(); System.out.println("请输入年龄"); int age = sc.nextInt(); System.out.println("请输入性别0或1"); int sex = sc.nextInt(); System.out.println("请输入成绩"); float score = sc.nextFloat(); return new Student(name,age,sex,score); } public static void theModificationSucceedsOrFails(boolean s) { if(s == true) System.out.println("修改成功"); else System.out.println("修改失败"); } }