postgresql - 迄今为止的 Java Cast 字符串

Question

如何将 java.lang.String 转换为 java.sql.Date 以获得以下值:'12/03/2016' ?

我试过这个:

@Override
public int insertNewApplication(StudenDetails sd)
{
    String sql = "INSERT INTO student_details"
            + "(applicant_name, applsex, "
            + "designation, date_of_superannuation, "
            + "ou_code, residential_address, "
            + "phone_no, mobile_no,email_id,token_user_id,token_password, "
            + "staff_status,office_type_code) VALUES (?, ?, ?,to(?,'DD/MM/YYYY'), ?, ?, ?, ?, ?, ?, ?,?,?)";

    return jdbcTemplate.update(sql, new Object[] {
            tpd.getApplicant_name(), tpd.getApplsex(),tpd.getDesignation(),tpd.getDate_of_superannuation(),tpd.getOu_code(),tpd.getResidential_address(),tpd.getPhone_no(),tpd.getMobile_no(),
            tpd.getEmail_id(),tpd.getToken_user_id(),tpd.getToken_password(),tpd.getStaff_status(),tpd.getOffice_type_code()
            });

}

Answer 1

不幸的是，在将字符串转换为日期时，并没有一种在 RDBMS 之间被广泛接受的标准方法。在您标记的 Postgres 中，您可以使用 to_date 函数:

to_date(?, 'DD/MM/YY')

恕我直言，更好的方法是在 Java 中进行这种转换，使您的应用程序更具可移植性:

private static final SimpleDateFormat FORMAT_CONVERTER = 

@Override
public int insertNewApplication(StudenDetails sd)
{
    String sql = "INSERT INTO student_details"
            + "(applicant_name, applsex, "
            + "designation, date_of_superannuation, "
            + "ou_code, residential_address, "
            + "phone_no, mobile_no,email_id,token_user_id,token_password, "
            + "staff_status,office_type_code) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?,?,?)";
    Date date = FORMAT_CONVERTER.parse(tpd.getDate_of_superannuation());

    return jdbcTemplate.update(sql, new Object[] {
            tpd.getApplicant_name(), tpd.getApplsex(),tpd.getDesignation(),date,tpd.getOu_code(),tpd.getResidential_address(),tpd.getPhone_no(),tpd.getMobile_no(),
            tpd.getEmail_id(),tpd.getToken_user_id(),tpd.getToken_password(),tpd.getStaff_status(),tpd.getOffice_type_code()
            });
}