從MySQL數據庫獲取Date對象並在格式化的文本字段上顯示

Question

我正在嘗試從數據庫中獲取出生日期，並將其顯示在JFormattedTextField上。 它應以mm / dd / yyyy格式顯示，但以yyyy / dd / mm格式存儲。 我將如何處理？ 患者的出生日期存儲為java.sql.Date

    JLabel lbl3 = new JLabel("Date of Birth:");
    lbl3.setBounds(17, 129, 90, 22);
    lbl3.setForeground(Color.WHITE);
    lbl3.setFont(new Font("Microsoft New Tai Lue", Font.PLAIN, 16));

    JFormattedTextField formattedDob = new JFormattedTextField();
    formattedDob.setEditable(false);
    formattedDob.setText("//");
    formattedDob.setBounds(201, 128, 183, 22);
    contentPane.add(formattedDob);  

JButton btnSearchPatient = new JButton("Search");
        btnSearchPatient.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                PatientSQL searchPatient = new PatientSQL();
                Patient staff = searchPatient.getBySSN(patient.getSsn());

            txtAddress1.setText(staff.getAddress1());
            txtAddress2.setText(staff.getAddress2());
            txtCity.setText(staff.getCity());
        }
    });

這是我的PatientSQL.java供參考（不相關的代碼（例如包和函數）已刪除，以便於閱讀）：

public class PatientSQL {
    private SessionFactory factory;

    public PatientSQL() {
        try {
            factory = new Configuration().configure().buildSessionFactory();
        } catch (Throwable ex) {
            System.err.println("Failed to create sessionFactory object." + ex);

            throw new ExceptionInInitializerError(ex);
        }
    }

    /* Method to CREATE a patient in the database */
    public void add(String fname, String lname, String ssn, java.sql.Date dob, String phoneNo, String address1, String address2, String city, String zipcode, String allergy1, String allergy2, String allergy3, String photo) {
        Patient patient = new Patient(fname, lname, ssn, dob, phoneNo, address1, address2, city, zipcode, allergy1, allergy2, allergy3, photo);

        add(patient);
    }

    public Patient getBySSN(String ssn) {
        Session session = factory.openSession();
        Patient patient = null;

        try {
            patient = (Patient) session.get(Patient.class, ssn);

        } catch (HibernateException e) {
            System.err.println("Can not find patient ssn: " + ssn);
        } finally {
            session.close();
        }

        return patient;
    }

}

Answer 1

也許您應該嘗試將日期轉換為：使用LocalDateTime＃parse（）（如果字符串碰巧包含時區部分，則使用ZonedDateTime＃parse（））將特定模式的字符串解析為LocalDateTime。 喜歡：

String date_s = "2011/01/18"; 
SimpleDateFormat dt = new SimpleDateFormat("yyyy/dd/mm"); 
Date date = dt.parse(date_s); 
SimpleDateFormat dt1 = new SimpleDateFormat("mm/dd/yyyy");
System.out.println(dt1.format(date));

Answer 2

愚蠢的要求要求愚蠢的答案：

CREATE TABLE patient (
...
dob_string VARCHAR(8),
dob_date DATE AS (STR_TO_DATE(dob_string,"%Y/%d/%m"))
)

因此，將其存儲到dob_string ，並從dob_date獲取，然后根據需要輸出格式。

Answer 3

如果可以使用SimpleDateFormat

SimpleDateFormat df = new SimpleDateFormat("MM/dd/yyyy");
df.format(patient.getDob()); //I'm guessing what the get method is named but you get what I mean