Android 判断输入的年月日是否合法-正则表达

判断输入的年月日是否合法的工具类如下，可直接复制粘贴使用：

package com.company.utils;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class ValidDateUtil {
    private static final String TAG = ValidDateUtil.class.getSimpleName();
    public static boolean validDateTime(String timeStr) {
        String format = "((19|20)[0-9]{2})-(0?[1-9]|1[012])-(0?[1-9]|[12][0-9]|3[01]) "
                + "([01]?[0-9]|2[0-3]):[0-5]?[0-9]:[0-5]?[0-9]";
        Pattern pattern = Pattern.compile(format);
        Matcher matcher = pattern.matcher(timeStr);
        if (matcher.matches()) {
            pattern = Pattern.compile("(\\d{4})-(\\d+)-(\\d+).*");
            matcher = pattern.matcher(timeStr);
            if (matcher.matches()) {
                int y = Integer.valueOf(matcher.group(1));
                int m = Integer.valueOf(matcher.group(2));
                int d = Integer.valueOf(matcher.group(3));
                if (d > 28) {
                    Calendar c = Calendar.getInstance();
                    c.set(y, m - 1, 1);
                    int lastDay = c.getActualMaximum(Calendar.DAY_OF_MONTH);
                    return (lastDay >= d);
                }
            }
            return true;
        } else {
            return false;
        }
    }
}

使用方式如下，因为只判断年月日，因此时分秒我默认都是00，主要是为了套用SimpleDateFormat的格式：

private long refreshAddTime() {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        StringBuilder sb = new StringBuilder();
        sb.append(mEditYear.getEditableText().toString()).append("-");
        sb.append(mEditMonth.getEditableText().toString()).append("-");
        sb.append(mEditDay.getEditableText().toString()).append(" ");
        sb.append("00").append(":").append("00").append(":").append("00");
        Log.d(TAG,"refreshAddTime: contract string: " + sb.toString());
        try {
            Date addTime = format.parse(sb.toString());
            //判断加入时间是否大于当前时间
            if (System.currentTimeMillis() < addTime.getTime()){
                ToastUtil.showCustomToast(mContext,mContext.getResources().getString(R.string.add_time_error));
                mAddTimeIsOk = false;
                return 0;
            }
            //判断加入时间是否为有效输入
            if (ValidDateUtil.validDateTime(sb.toString())){
                Log.d(TAG,"ValidDateUtil: is valid date!!!!");
                mAddTimeIsOk = true;
                return addTime.getTime()/1000;
            } else {
                mAddTimeIsOk = false;
                ToastUtil.showCustomToast(mContext,mContext.getResources().getString(R.string.input_add_time_error));
            }
        } catch (ParseException e) {
            mAddTimeIsOk = false;
            ToastUtil.showCustomToast(mContext,mContext.getResources().getString(R.string.input_add_time_error));
            FoodLog.e(TAG,"add time error!!!!!");
        }
        return 0;
    }