package com.ifish.util;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;

public class IfishUtil {

	private static final String formatDate1 ="yyyy-MM-dd";
	private static final String formatDate2 ="yyyy-MM-dd HH:mm:ss";
	
	/**
	 * 格式化日期yyyy-MM-dd HH:mm:ss
	 * @param date
	 * @return
	 */
	public static String format2(Date date){
		SimpleDateFormat format = new SimpleDateFormat(formatDate2);
		return format.format(date);
	}
	
	/**
	 * 格式化日期yyyy-MM-dd
	 * @param date
	 * @return
	 */
	public static String format1(Date date){
		SimpleDateFormat format = new SimpleDateFormat(formatDate1);
		return format.format(date);
	}
	
	/**
	 * 随机生成字母与数字组合
	 * @param length
	 * @return
	 */
	public static String getCharAndNumr(int length) {
		String val = "";
		Random random = new Random();
		for (int i = 0; i < length; i++) {
			// 输出字母还是数字
			String charOrNum = random.nextInt(2) % 2 == 0 ? "char" : "num"; 
			// 字符串
			if ("char".equalsIgnoreCase(charOrNum)) {
				// 取得大写字母还是小写字母
				int choice = random.nextInt(2) % 2 == 0 ? 65 : 97; 
				val += (char) (choice + random.nextInt(26));
				// 数字
			} else if ("num".equalsIgnoreCase(charOrNum)) { 
				val += String.valueOf(random.nextInt(10));
			}
		}
		return val;
	}
	
}