Arabic date conversion issue in java

Question

I have a bean class like

import org.springframework.format.annotation.DateTimeFormat;
import java.time.LocalDate;

public class Form {
    private String name;
    private Long numID;
    private String Address;
    @DateTimeFormat(iso = DateTimeFormat.ISO.DATE)
    private LocalDate date1;

    // getters and setters

}

This is used in a rest controller class

import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;


public class MyController {

    private String MY_URL = "/model.do"
    @RequestMapping(value = {MY_URL}, method = RequestMethod.POST)
    @ResponseBody
    Public Model getModelType(@ModelAttribute Form myForm){

    }


}

now when I pass a arabic date object which is encoded like

%D9%A2%D9%A0%D9%A1%D9%A9-%D9%A0%D9%A4-%D9%A1%D9%A5, the conversion is failing with the below error

org.springframework.validation.BindException: org.springframework.validation.BeanPropertyBindingResult: 1 errors Field error in object 'form' on field 'date1': rejected value [????-??-??]; codes [typeMismatch.form.date1,typeMismatch.isoCheckInDate,typeMismatch.java.time.LocalDate,typeMismatch]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [form.isoCheckInDate,isoCheckInDate]; arguments []; default message [isoCheckInDate]]; default message [Failed to convert property value of type 'java.lang.String' to required type 'java.time.LocalDate' for property 'date1'; nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [@org.springframework.format.annotation.DateTimeFormat java.time.LocalDate] for value '????-??-??'; nested exception is java.lang.IllegalArgumentException: Parse attempt failed for value [????-??-??]]

Any idea how can to handle this type of scenario ?

Can you show us your code? A Minimal, Complete, and Verifiable example? — Ole V.V.
You pass the arabic date (is it today?) as an utf8 encoded byte string. The error probably comes from the fact that you fail to correctly convert it to a (unicode) Java String. Without knowing more (where does the date comes from and how) I cannot say more. — Serge Ballesta

Ole V.V. Ole V.V. · Accepted Answer · 2019-03-05T14:20:50

While I don’t know what Spring Framework has done and why, I can show you how to parse your string in plain Java:

    DecimalStyle defaultDecimalStyle
            = DateTimeFormatter.ISO_LOCAL_DATE.getDecimalStyle();
    DateTimeFormatter arabicDateFormatter = DateTimeFormatter.ISO_LOCAL_DATE
            .withDecimalStyle(defaultDecimalStyle.withZeroDigit('\u0660'));

    String encodedArabicDateStr = "%D9%A2%D9%A0%D9%A1%D9%A9-%D9%A0%D9%A4-%D9%A1%D9%A5";
    String arabicDateStr
            = URLDecoder.decode(encodedArabicDateStr, StandardCharsets.UTF_8);
    LocalDate date = LocalDate.parse(arabicDateStr, arabicDateFormatter);
    System.out.println("Parsed date: " + date);

Output from this snippet is:

Parsed date: 2019-04-15

The only trick is to tell the formatter to parse Arabic digits. When we tell it the zero digit (٠ or '\u0660'), it figures out the other digits.

Arabic date conversion issue in java

1 Answers