package com.iflytek.studentmanagesystem.view;
import java.util.Comparator;
import java.util.List;
import java.util.Scanner;
import com.iflytek.studentmanagesystem.pojo.Student;
import com.iflytek.studentmanagesystem.service.StudentService;
import com.iflytek.studentmanagesystem.service.impl.StudentServiceImpl;
import com.iflytek.studentmanagesystem.util.DateUtil;
public class MainClass {
public static void main
(String[] args
) { while (true) {
System.
out.
println("#######欢迎使用xxxx学生管理系统#######"); System.
out.
println("1.增加学生信息\n2.删除学生信息\n3.修改学生信息\n4.查询学生信息\n0.退出系统\n请选择："); Scanner sc
= new Scanner
(System.
in); int select = sc.nextInt();
if (select == 0) {
break;
} else if (select == 1) {
doAddStudent();
} else if (select == 2) {
doDeleteStudent();
} else if (select == 3) {
doModifyStudent();
} else if (select == 4) {
doQeuryStudent();
} else {
System.
out.
println("错误的功能代码！"); }
}
}
private static void doAddStudent() {
// TODO Auto-generated method stub
StudentService service = new StudentServiceImpl();
Scanner sc
= new Scanner
(System.
in); System.
out.
println("输入要新增的学生的学号："); int number = sc.nextInt();
if (service.queryByNumber(number) != null) {
System.
out.
println("该学号对应的学生信息已经存在！"); return;
}
sc.nextLine(); // 消除前面输入整数留下的回车符
System.
out.
println("输入要新增的学生姓名："); System.
out.
println("请输入要新增的学生性别："); String gender
= sc.
nextLine(); System.
out.
println("请输入要新增的学生出生日期（如1990-1-1）："); String birthday
= sc.
nextLine(); System.
out.
println("请输入要新增的学生入学日期（如2019-9-1）："); String entranceday
= sc.
nextLine();
Student stu = new Student();
stu.setNumber(number);
stu.setName(name);
stu.setGender(gender);
stu.setBirthday(DateUtil.str2date(birthday));
stu.setEntranceday(DateUtil.str2date(entranceday));
if (1 == service.add(stu)) {
System.
out.
println("学生信息新增完成！"); } else {
System.
out.
println("学生信息增加失败！"); }
}
private static void doDeleteStudent() {
StudentService service = new StudentServiceImpl();
Scanner sc
= new Scanner
(System.
in); System.
out.
println("输入要删除的学生的学号："); int number = sc.nextInt();
if (0 == service.delete(number)) {
System.
out.
println("学生信息不存在，删除失败！"); } else {
System.
out.
println("学生信息删除完成！"); }
}
private static void doModifyStudent() {
StudentService service = new StudentServiceImpl();
Scanner sc
= new Scanner
(System.
in); System.
out.
println("输入要修改的学生的学号："); int number = sc.nextInt();
if (service.queryByNumber(number) == null) {
System.
out.
println("该学号对应的学生信息不存在，无法修改！"); return;
}
sc.nextLine();
System.
out.
println("输入要修改的学生新的姓名："); System.
out.
println("请输入要修改的学生新的性别："); String gender
= sc.
nextLine(); System.
out.
println("请输入要修改的学生新的出生日期（如1990-1-1）："); String birthday
= sc.
nextLine(); System.
out.
println("请输入要修改的学生新的入学日期（如2019-9-1）："); String entranceday
= sc.
nextLine();
Student stu = new Student();
stu.setNumber(number);
stu.setName(name);
stu.setGender(gender);
stu.setBirthday(DateUtil.str2date(birthday));
stu.setEntranceday(DateUtil.str2date(entranceday));
if (1 == service.modify(stu)) {
System.
out.
println("学生信息修改完成！"); } else {
System.
out.
println("学生信息修改失败！"); }
}
private static void doQeuryStudent() {
StudentService service = new StudentServiceImpl();
while (true) {
System.
out.
println("1.按学号查询\n2.按姓名查询\n3.查看所有\n4.按年龄降序查看所有\n0.返回\n请选择："); Scanner sc
= new Scanner
(System.
in); int select = sc.nextInt();
if (select == 0) {
break;
} else if (select == 1) {
System.
out.
println("输入要查询的学生的学号："); int number = sc.nextInt();
Student stu = service.queryByNumber(number);
if (stu == null) {
System.
out.
println("未查询到相关信息"); } else {
System.
out.
println("查询到学生的信息：\n" + stu
); }
} else if (select == 2) {
System.
out.
println("输入要查询的学生的姓名："); List<Student> stus = service.queryByName(name);
if (stus.size() == 0) {
System.
out.
println("未查询到相关信息"); } else {
System.
out.
println("查询到学生的信息："); for (int i = 0; i < stus.size(); i++) {
System.
out.
println(stus.
get(i
)); }
}
} else if (select == 3) {
System.
out.
println("所有学生的信息："); List<Student> stus = service.queryAll();
for (int i = 0; i < stus.size(); i++) {
System.
out.
println(stus.
get(i
)); }
} else if (select == 4) {
System.
out.
println("按年龄降序排列学生的信息："); List<Student> stus = service.queryAll();
stus.sort(new Comparator<Student>() {
@Override
public int compare(Student o1, Student o2) {
return (int) (o2.getBirthday().getTime() - o1.getBirthday().getTime());
}
});
for (int i = 0; i < stus.size(); i++) {
System.
out.
println(stus.
get(i
)); }
} else {
System.
out.
println("错误的功能代码！"); }
}
}
}