jeecgboot/JeecgBoot · error · IllegalArgumentException

Could not parse date, date format is error

Error message

Could not parse date, date format is error 

What it means

This is a Spring PropertyEditor (setAsText) used to bind date strings. It accepts exactly two formats: a 10-char date without a colon (yyyy-MM-dd via date_sdf) and a 19-char datetime with a colon (yyyy-MM-dd HH:mm:ss via datetimeFormat). Any other length/format throws IllegalArgumentException with the literal message. A separate branch re-wraps actual ParseExceptions. This editor is registered for form binding and Excel import date columns.

Source

Thrown at jeecg-boot/jeecg-boot-base-core/src/main/java/org/jeecg/common/util/DateUtils.java:674

        return Long.valueOf(DateUtils.yyyymmddhhmmss.get().format(new Date()));
    }

    /**
     * String类型 转换为Date, 如果参数长度为10 转换格式”yyyy-MM-dd“ 如果参数长度为19 转换格式”yyyy-MM-dd
     * HH:mm:ss“ * @param text String类型的时间值
     */
    @Override
    public void setAsText(String text) throws IllegalArgumentException {
        if (StringUtils.hasText(text)) {
            try {
                int length10 = 10;
                int length19 = 19;
                if (text.indexOf(SymbolConstant.COLON) == -1 && text.length() == length10) {
                    setValue(DateUtils.date_sdf.get().parse(text));
                } else if (text.indexOf(SymbolConstant.COLON) > 0 && text.length() == length19) {
                    setValue(DateUtils.datetimeFormat.get().parse(text));
                } else {
                    throw new IllegalArgumentException("Could not parse date, date format is error ");
                }
            } catch (ParseException ex) {
                IllegalArgumentException iae = new IllegalArgumentException("Could not parse date: " + ex.getMessage());
                iae.initCause(ex);
                throw iae;
            }
        } else {
            setValue(null);
        }
    }

    public static int getYear() {
        GregorianCalendar calendar = new GregorianCalendar();
        calendar.setTime(getDate());
        return calendar.get(Calendar.YEAR);
    }

    /**

View on GitHub (pinned to 96fb33f5ec)

Solutions

1. Send dates in one of the two accepted formats: 'yyyy-MM-dd' or 'yyyy-MM-dd HH:mm:ss'.
2. If you must accept other formats, register a custom PropertyEditor or use @DateTimeFormat(pattern=...) on the field.
3. Normalize date strings on the frontend before submission.
4. For Excel imports, ensure the cell format produces one of the two accepted string forms.

Example fix

// before — client sends ISO with 'T'
"2024-01-01T12:00:00" // length 19 but parse fails format-wise

// after — use the space-separated datetime form
"2024-01-01 12:00:00"

// Normalize date strings to the accepted formats before binding
public static String normalizeDate(String text) {
  if (text == null || text.isBlank()) return null;
  text = text.replace('T', ' ');
  if (text.length() == 10) return text; // yyyy-MM-dd
  if (text.length() >= 19) return text.substring(0, 19); // yyyy-MM-dd HH:mm:ss
  throw new IllegalArgumentException("Unsupported date format: " + text);
}

public static boolean isAcceptableDateFormat(String text) {
  return text != null &&
    ((text.length() == 10 && !text.contains(":")) ||
     (text.length() == 19 && text.indexOf(':') > 0));
}

try {
  binder.setAutoGrowNestedPaths(true);
} catch (IllegalArgumentException e) {
  if (e.getMessage().contains("Could not parse date")) {
    // retry with normalized format or reject input
  }
}

When it happens

Trigger: A date string bound via the property editor whose length is not 10 (no colon) or 19 (with colon) — e.g. '2024/01/01' (slashes, length 10, no colon but won't parse), '2024-1-1' (length 8), ISO with T ('2024-01-01T00:00:00', length 19 but separator is T not space so datetimeFormat parse fails -> throws the ParseException wrapper instead), or a time-only value.

Common situations: Excel import with mixed date formats; frontend sending ISO 8601 with 'T' separator or timezone offset; locale-specific date strings; a date picker returning 'yyyy/MM/dd'.

Related errors

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• 模板缺少参数：${item}

AI-assisted analysis of jeecgboot/JeecgBoot@96fb33f5ec (2026-08-14). Data as JSON: /api/errors/dc26043e9e574d01. Report an issue: GitHub.