import java
.util
.ArrayList;
import java
.util
.Scanner;
import java
.io
.*;
public class HospitalManagement
System {
private static ArrayList<Patient> patients = new ArrayList<>
();
private static ArrayList<Doctor> doctors = new ArrayList<>
();
private static ArrayList<Appointment> appointments = new ArrayList<>
();
private static Scanner scanner = new Scanner(
System.in);
private static int patientIdCounter = 1;
private static int doctorIdCounter = 1;
private static int appointmentIdCounter = 1;
private static final String DATA_FILE = "hospital_data
.dat";
public static void main(String[] args) {
loadData
();
Runtime
.getRuntime
().addShutdownHook(new Thread(
() -> saveData
()));
while (true) {
System.out.println("\n=== 医院管理系统 ===");
System.out.println("1
. 患者管理");
System.out.println("2
. 医生管理");
System.out.println("3
. 预约管理");
System.out.println("4
. 退出系统");
System.out.print("请选择操作: ");
int choice = scanner
.nextInt
();
scanner
.nextLine
(); // 消耗换行符
switch (choice) {
case 1:
managePatients
();
break;
case 2:
manageDoctors
();
break;
case 3:
manageAppointments
();
break;
case 4:
// 移除显式的saveData
()调用，让关闭钩子处理数据保存
System.exit(0);
default:
System.out.println("无效选择，请重新输入。");
}
}
}
private static void managePatients
() {
while (true) {
System.out.println("\n=== 患者管理 ===");
System.out.println("1
. 添加患者");
System.out.println("2
. 查看所有患者");
System.out.println("3
. 查找患者");
System.out.println("4
. 修改患者信息");
System.out.println("5
. 删除患者");
System.out.println("6
. 返回主菜单");
System.out.print("请选择操作: ");
int choice = scanner
.nextInt
();
scanner
.nextLine
();
switch (choice) {
case 1:
addPatient
();
break;
case 2:
listAllPatients
();
break;
case 3:
searchPatient
();
break;
case 4:
updatePatient
();
break;
case 5:
deletePatient
();
break;
case 6:
return;
default:
System.out.println("无效选择，请重新输入。");
}
}
}
private static void addPatient
() {
System.out.print("请输入患者姓名: ");
String name = scanner
.nextLine
();
System.out.print("请输入患者年龄: ");
int age = scanner
.nextInt
();
scanner
.nextLine
();
System.out.print("请输入患者性别: ");
String gender = scanner
.nextLine
();
System.out.print("请输入患者电话: ");
String phone = scanner
.nextLine
();
Patient patient = new Patient(patientIdCounter++, name, age, gender, phone);
patients
.add(patient);
System.out.println("患者添加成功！");
}
private static void listAllPatients
() {
if (patients
.isEmpty
()) {
System.out.println("没有患者记录。");
return;
}
System.out.println("\n=== 所有患者 ===");
for (Patient patient : patients) {
System.out.println("ID: " + patient
.getId
() +
", 姓名: " + patient
.getName
() +
", 年龄: " + patient
.getAge
() +
", 性别: " + patient
.getGender
() +
", 电话: " + patient
.getPhone
());
}
}
private static void searchPatient
() {
System.out.print("请输入要查找的患者ID: ");
int id = scanner
.nextInt
();
scanner
.nextLine
();
boolean found = false;
for (Patient patient : patients) {
if (patient
.getId
() == id) {
System.out.println("找到患者记录:");
System.out.println("ID: " + patient
.getId
() +
", 姓名: " + patient
.getName
() +
", 年龄: " + patient
.getAge
() +
", 性别: " + patient
.getGender
() +
", 电话: " + patient
.getPhone
());
found = true;
break;
}
}
if (!found) {
System.out.println("未找到匹配的患者记录。");
}
}
private static void manageDoctors
() {
while (true) {
System.out.println("\n=== 医生管理 ===");
System.out.println("1
. 添加医生");
System.out.println("2
. 查看所有医生");
System.out.println("3
. 查找医生");
System.out.println("4
. 修改医生信息");
System.out.println("5
. 删除医生");
System.out.println("6
. 返回主菜单");
System.out.print("请选择操作: ");
int choice = scanner
.nextInt
();
scanner
.nextLine
();
switch (choice) {
case 1:
addDoctor
();
break;
case 2:
listAllDoctors
();
break;
case 3:
searchDoctor
();
break;
case 4:
updatePatient
();
break;
case 5:
deletePatient
();
break;
case 6:
return;
default:
System.out.println("无效选择，请重新输入。");
}
}
}
private static void addDoctor
() {
System.out.print("请输入医生姓名: ");
String name = scanner
.nextLine
();
System.out.print("请输入医生科室: ");
String department = scanner
.nextLine
();
System.out.print("请输入医生电话: ");
String phone = scanner
.nextLine
();
Doctor doctor = new Doctor(doctorIdCounter++, name, department, phone);
doctors
.add(doctor);
System.out.println("医生添加成功！");
}
private static void listAllDoctors
() {
if (doctors
.isEmpty
()) {
System.out.println("没有医生记录。");
return;
}
System.out.println("\n=== 所有医生 ===");
for (Doctor doctor : doctors) {
System.out.println("ID: " + doctor
.getId
() +
", 姓名: " + doctor
.getName
() +
", 科室: " + doctor
.getDepartment
() +
", 电话: " + doctor
.getPhone
());
}
}
private static void searchDoctor
() {
System.out.println("\n=== 查找医生 ===");
System.out.println("1
. 按ID查找");
System.out.println("2
. 按科室查找");
System.out.print("请选择查找方式: ");
int choice = scanner
.nextInt
();
scanner
.nextLine
();
if (choice == 1) {
System.out.print("请输入要查找的医生ID: ");
int id = scanner
.nextInt
();
scanner
.nextLine
();
boolean found = false;
for (Doctor doctor : doctors) {
if (doctor
.getId
() == id) {
System.out.println("找到医生记录:");
System.out.println("ID: " + doctor
.getId
() +
", 姓名: " + doctor
.getName
() +
", 科室: " + doctor
.getDepartment
() +
", 电话: " + doctor
.getPhone
());
found = true;
break;
}
}
if (!found) {
System.out.println("未找到匹配的医生记录。");
}
} else if (choice == 2) {
System.out.print("请输入要查找的科室名称: ");
String department = scanner
.nextLine
();
boolean found = false;
System.out.println("\n=== " + department + "科室医生列表 ===");
for (Doctor doctor : doctors) {
if (doctor
.getDepartment
().equalsIgnoreCase(department)) {
System.out.println("ID: " + doctor
.getId
() +
", 姓名: " + doctor
.getName
() +
", 电话: " + doctor
.getPhone
());
found = true;
}
}
if (!found) {
System.out.println("未找到该科室的医生记录。");
}
} else {
System.out.println("无效选择。");
}
}
private static void manageAppointments
() {
while (true) {
System.out.println("\n=== 预约管理 ===");
System.out.println("1
. 添加预约");
System.out.println("2
. 查看所有预约");
System.out.println("3
. 查找预约");
System.out.println("4
. 修改预约信息");
System.out.println("5
. 删除预约");
System.out.println("6
. 返回主菜单");
System.out.print("请选择操作: ");
int choice = scanner
.nextInt
();
scanner
.nextLine
();
switch (choice) {
case 1:
addAppointment
();
break;
case 2:
listAllAppointments
();
break;
case 3:
searchAppointment
();
break;
case 4:
updatePatient
();
break;
case 5:
deletePatient
();
break;
case 6:
return;
default:
System.out.println("无效选择，请重新输入。");
}
}
}
private static void addAppointment
() {
System.out.print("请输入患者ID: ");
int patientId = scanner
.nextInt
();
scanner
.nextLine
();
System.out.print("请输入医生ID: ");
int doctorId = scanner
.nextInt
();
scanner
.nextLine
();
System.out.print("请输入预约日期(YYYY-MM-DD): ");
String date = scanner
.nextLine
();
System.out.print("请输入预约时间(HH:MM): ");
String time = scanner
.nextLine
();
Patient patient = findPatientById(patientId);
Doctor doctor = findDoctorById(doctorId);
if (patient == null || doctor == null) {
System.out.println("患者或医生不存在，请检查ID！");
return;
}
Appointment appointment = new Appointment(appointmentIdCounter++, patient, doctor, date, time);
appointments
.add(appointment);
System.out.println("预约添加成功！");
}
private static void listAllAppointments
() {
if (appointments
.isEmpty
()) {
System.out.println("没有预约记录。");
return;
}
System.out.println("\n=== 所有预约 ===");
for (Appointment appointment : appointments) {
System.out.println("预约ID: " + appointment
.getId
() +
", 患者: " + appointment
.getPatient
().getName
() +
", 医生: " + appointment
.getDoctor
().getName
() +
", 日期: " + appointment
.getDate
() +
", 时间: " + appointment
.getTime
());
}
}
private static void searchAppointment
() {
System.out.print("请输入要查找的预约ID: ");
int id = scanner
.nextInt
();
scanner
.nextLine
();
boolean found = false;
for (Appointment appointment : appointments) {
if (appointment
.getId
() == id) {
System.out.println("找到预约记录:");
System.out.println("预约ID: " + appointment
.getId
() +
", 患者: " + appointment
.getPatient
().getName
() +
", 医生: " + appointment
.getDoctor
().getName
() +
", 日期: " + appointment
.getDate
() +
", 时间: " + appointment
.getTime
());
found = true;
break;
}
}
if (!found) {
System.out.println("未找到匹配的预约记录。");
}
}
private static Patient findPatientById(int id) {
for (Patient patient : patients) {
if (patient
.getId
() == id) {
return patient;
}
}
return null;
}
private static Doctor findDoctorById(int id) {
for (Doctor doctor : doctors) {
if (doctor
.getId
() == id) {
return doctor;
}
}
return null;
}
private static void updatePatient
() {
System.out.print("请输入要修改的患者ID: ");
int id = scanner
.nextInt
();
scanner
.nextLine
();
Patient patient = findPatientById(id);
if (patient == null) {
System.out.println("未找到匹配的患者记录。");
return;
}
System.out.println("当前患者信息:");
System.out.println("ID: " + patient
.getId
() +
", 姓名: " + patient
.getName
() +
", 年龄: " + patient
.getAge
() +
", 性别: " + patient
.getGender
() +
", 电话: " + patient
.getPhone
());
System.out.println("\n请输入新的患者信息(留空保持不变):");
System.out.print("姓名: ");
String name = scanner
.nextLine
();
if (!name
.isEmpty
()) {
patient
.name = name;
}
System.out.print("年龄: ");
String ageStr = scanner
.nextLine
();
if (!ageStr
.isEmpty
()) {
patient
.age = Integer
.parseInt(ageStr);
}
System.out.print("性别: ");
String gender = scanner
.nextLine
();
if (!gender
.isEmpty
()) {
patient
.gender = gender;
}
System.out.print("电话: ");
String phone = scanner
.nextLine
();
if (!phone
.isEmpty
()) {
patient
.phone = phone;
}
System.out.println("患者信息修改成功！");
}
private static void updateDoctor
() {
System.out.print("请输入要修改的医生ID: ");
int id = scanner
.nextInt
();
scanner
.nextLine
();
Doctor doctor = findDoctorById(id);
if (doctor == null) {
System.out.println("未找到匹配的医生记录。");
return;
}
System.out.println("当前医生信息:");
System.out.println("ID: " + doctor
.getId
() +
", 姓名: " + doctor
.getName
() +
", 科室: " + doctor
.getDepartment
() +
", 电话: " + doctor
.getPhone
());
System.out.println("\n请输入新的医生信息(留空保持不变):");
System.out.print("姓名: ");
String name = scanner
.nextLine
();
if (!name
.isEmpty
()) {
doctor
.name = name;
}
System.out.print("科室: ");
String department = scanner
.nextLine
();
if (!department
.isEmpty
()) {
doctor
.department = department;
}
System.out.print("电话: ");
String phone = scanner
.nextLine
();
if (!phone
.isEmpty
()) {
doctor
.phone = phone;
}
System.out.println("医生信息修改成功！");
}
private static void updateAppointment
() {
System.out.print("请输入要修改的预约ID: ");
int id = scanner
.nextInt
();
scanner
.nextLine
();
Appointment appointment = findAppointmentById(id);
if (appointment == null) {
System.out.println("未找到匹配的预约记录。");
return;
}
System.out.println("当前预约信息:");
System.out.println("预约ID: " + appointment
.getId
() +
", 患者: " + appointment
.getPatient
().getName
() +
", 医生: " + appointment
.getDoctor
().getName
() +
", 日期: " + appointment
.getDate
() +
", 时间: " + appointment
.getTime
());
System.out.println("\n请输入新的预约信息(留空保持不变):");
System.out.print("患者ID: ");
String patientIdStr = scanner
.nextLine
();
if (!patientIdStr
.isEmpty
()) {
int patientId = Integer
.parseInt(patientIdStr);
Patient patient = findPatientById(patientId);
if (patient == null) {
System.out.println("患者不存在，修改失败！");
return;
}
appointment
.patient = patient;
}
System.out.print("医生ID: ");
String doctorIdStr = scanner
.nextLine
();
if (!doctorIdStr
.isEmpty
()) {
int doctorId = Integer
.parseInt(doctorIdStr);
Doctor doctor = findDoctorById(doctorId);
if (doctor == null) {
System.out.println("医生不存在，修改失败！");
return;
}
appointment
.doctor = doctor;
}
System.out.print("日期(YYYY-MM-DD): ");
String date = scanner
.nextLine
();
if (!date
.isEmpty
()) {
appointment
.date = date;
}
System.out.print("时间(HH:MM): ");
String time = scanner
.nextLine
();
if (!time
.isEmpty
()) {
appointment
.time = time;
}
System.out.println("预约信息修改成功！");
}
private static Appointment findAppointmentById(int id) {
for (Appointment appointment : appointments) {
if (appointment
.getId
() == id) {
return appointment;
}
}
return null;
}
private static void deletePatient
() {
System.out.print("请输入要删除的患者ID: ");
int id = scanner
.nextInt
();
scanner
.nextLine
();
boolean found = false;
for (int i = 0; i < patients
.size
(); i++) {
if (patients
.get(i)
.getId
() == id) {
patients
.remove(i);
System.out.println("患者删除成功！");
found = true;
break;
}
}
if (!found) {
System.out.println("未找到匹配的患者记录。");
}
}
private static void deleteAppointment
() {
System.out.print("请输入要删除的预约ID: ");
int id = scanner
.nextInt
();
scanner
.nextLine
();
boolean found = false;
for (int i = 0; i < appointments
.size
(); i++) {
if (appointments
.get(i)
.getId
() == id) {
appointments
.remove(i);
System.out.println("预约删除成功！");
found = true;
break;
}
}
if (!found) {
System.out.println("未找到匹配的预约记录。");
}
}
private static void deleteDoctor
() {
System.out.print("请输入要删除的医生ID: ");
int id = scanner
.nextInt
();
scanner
.nextLine
();
boolean found = false;
for (int i = 0; i < doctors
.size
(); i++) {
if (doctors
.get(i)
.getId
() == id) {
// 先删除与该医生相关的预约
for (int j = appointments
.size
() - 1; j >= 0; j--) {
if (appointments
.get(j)
.getDoctor
().getId
() == id) {
appointments
.remove(j);
}
}
doctors
.remove(i);
System.out.println("医生删除成功！");
found = true;
break;
}
}
if (!found) {
System.out.println("未找到匹配的医生记录。");
}
}
private static void saveData
() {
try (Object
OutputStream oos = new Object
OutputStream(new File
OutputStream(DATA_FILE))) {
oos
.writeObject(patients);
oos
.writeObject(doctors);
oos
.writeObject(appointments);
oos
.writeInt(patientIdCounter);
oos
.writeInt(doctorIdCounter);
oos
.writeInt(appointmentIdCounter);
System.out.println("数据已保存！");
} catch (IOException e) {
System.err
.println("保存数据时出错: " + e
.getMessage
());
}
}
@SuppressWarnings("unchecked")
private static void loadData
() {
File file = new File(DATA_FILE);
if (!file
.exists
()) {
return;
}
try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream(DATA_FILE))) {
patients = (ArrayList<Patient>) ois
.readObject
();
doctors = (ArrayList<Doctor>) ois
.readObject
();
appointments = (ArrayList<Appointment>) ois
.readObject
();
patientIdCounter = ois
.readInt
();
doctorIdCounter = ois
.readInt
();
appointmentIdCounter = ois
.readInt
();
System.out.println("数据已加载！");
} catch (IOException | ClassNotFoundException e) {
System.err
.println("加载数据时出错: " + e
.getMessage
());
}
}
static class Appointment implements Serializable {
private int id;
private Patient patient;
private Doctor doctor;
private String date;
private String time;
public Appointment(int id, Patient patient, Doctor doctor, String date, String time) {
this
.id = id;
this
.patient = patient;
this
.doctor = doctor;
this
.date = date;
this
.time = time;
}
public int getId
() {
return id; }
public Patient getPatient
() {
return patient; }
public Doctor getDoctor
() {
return doctor; }
public String getDate
() {
return date; }
public String getTime
() {
return time; }
}
static class Patient implements Serializable {
private int id;
private String name;
private int age;
private String gender;
private String phone;
public Patient(int id, String name, int age, String gender, String phone) {
this
.id = id;
this
.name = name;
this
.age = age;
this
.gender = gender;
this
.phone = phone;
}
public int getId
() {
return id; }
public String getName
() {
return name; }
public int getAge
() {
return age; }
public String getGender
() {
return gender; }
public String getPhone
() {
return phone; }
}
static class Doctor implements Serializable {
private int id;
private String name;
private String department;
private String phone;
public Doctor(int id, String name, String department, String phone) {
this
.id = id;
this
.name = name;
this
.department = department;
this
.phone = phone;
}
public int getId
() {
return id; }
public String getName
() {
return name; }
public String getDepartment
() {
return department; }
public String getPhone
() {
return phone; }
}
}在此基础上 在查找患者中添加姓名查找功能 输出完整代码
本文详细解释了在程序中使用System.exit(0)与return的主要区别。System.exit(0)用于立即终止整个程序，而return则用于从当前方法返回到调用者。此外，文章还讨论了这些命令在不同上下文中的适用性和最佳实践。
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