如何利用MySQL和Java开发一个简单的在线医院预约平台
随着社会发展和医疗水平提高，人们对医疗资源的需求也越来越大。为了满足人们的就医需求，开发一个简单的在线医院预约平台显得十分必要。本文将介绍如何利用MySQL和Java来实现这一目标，并提供具体的代码示例。
- 数据库设计
首先需要设计数据库的结构，以存储医院、科室、医生和预约等信息。一个简单的数据库设计如下：
1.1 医院表(hospital)
字段：id, name, address, phone
1.2 科室表(department)
字段：id, hospital_id, name
1.3 医生表(doctor)
字段：id, department_id, name, title, introduction
1.4 预约表(appointment)
字段：id, doctor_id, patient_name, patient_phone, appointment_date
- 数据库连接
在Java中，我们可以使用JDBC来连接MySQL数据库。下面是一个简单的数据库连接代码示例：
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class DatabaseUtil {
private static final String URL = "jdbc:mysql://localhost:3306/hospital";
private static final String USERNAME = "root";
private static final String PASSWORD = "password";
public static Connection getConnection() throws SQLException {
return DriverManager.getConnection(URL, USERNAME, PASSWORD);
}
}- 查询医院和科室信息
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class HospitalDao {
public List<Hospital> getAllHospitals() {
List<Hospital> hospitals = new ArrayList<>();
String sql = "SELECT * FROM hospital";
try (Connection connection = DatabaseUtil.getConnection();
PreparedStatement statement = connection.prepareStatement(sql);
ResultSet resultSet = statement.executeQuery()) {
while (resultSet.next()) {
Hospital hospital = new Hospital();
hospital.setId(resultSet.getInt("id"));
hospital.setName(resultSet.getString("name"));
hospital.setAddress(resultSet.getString("address"));
hospital.setPhone(resultSet.getString("phone"));
hospitals.add(hospital);
}
} catch (SQLException e) {
e.printStackTrace();
}
return hospitals;
}
public List<Department> getDepartmentsByHospitalId(int hospitalId) {
List<Department> departments = new ArrayList<>();
String sql = "SELECT * FROM department WHERE hospital_id = ?";
try (Connection connection = DatabaseUtil.getConnection();
PreparedStatement statement = connection.prepareStatement(sql)) {
statement.setInt(1, hospitalId);
try (ResultSet resultSet = statement.executeQuery()) {
while (resultSet.next()) {
Department department = new Department();
department.setId(resultSet.getInt("id"));
department.setHospitalId(hospitalId);
department.setName(resultSet.getString("name"));
departments.add(department);
}
}
} catch (SQLException e) {
e.printStackTrace();
}
return departments;
}
}- 查询医生信息
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class DoctorDao {
public List<Doctor> getDoctorsByDepartmentId(int departmentId) {
List<Doctor> doctors = new ArrayList<>();
String sql = "SELECT * FROM doctor WHERE department_id = ?";
try (Connection connection = DatabaseUtil.getConnection();
PreparedStatement statement = connection.prepareStatement(sql)) {
statement.setInt(1, departmentId);
try (ResultSet resultSet = statement.executeQuery()) {
while (resultSet.next()) {
Doctor doctor = new Doctor();
doctor.setId(resultSet.getInt("id"));
doctor.setDepartmentId(departmentId);
doctor.setName(resultSet.getString("name"));
doctor.setTitle(resultSet.getString("title"));
doctor.setIntroduction(resultSet.getString("introduction"));
doctors.add(doctor);
}
}
} catch (SQLException e) {
e.printStackTrace();
}
return doctors;
}
}- 创建预约
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Date;
public class AppointmentDao {
public void createAppointment(int doctorId, String patientName, String patientPhone, Date appointmentDate) {
String sql = "INSERT INTO appointment (doctor_id, patient_name, patient_phone, appointment_date) " +
"VALUES (?, ?, ?, ?)";
try (Connection connection = DatabaseUtil.getConnection();
PreparedStatement statement = connection.prepareStatement(sql)) {
statement.setInt(1, doctorId);
statement.setString(2, patientName);
statement.setString(3, patientPhone);
statement.setDate(4, new java.sql.Date(appointmentDate.getTime()));
statement.executeUpdate();
} catch (SQLException e) {
e.printStackTrace();
}
}
}以上代码示例演示了如何使用MySQL和Java开发一个简单的在线医院预约平台。通过数据库设计和对应的Java代码，我们可以实现医院、科室、医生和预约等信息的查询和创建。当然，这只是一个简单的示例，实际开发中还需考虑更多的功能和优化。希望本文能给读者带来一些启发，而实际开发中需要结合具体需求进行详细设计和实现。
