/**
 *  ClassName: DataValidateUtil.java
 *  created on Jul 10, 2009
 *  Copyrights 2009 www.tjicast.com All rights reserved.
 *  site: http://www.tjitcast.com
 *  email: tjhr@csdn.net
 *  phone: 022-83726777,89721888
 */
package com.javacrazyer.common;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Collection;
import java.util.Date;
import java.util.Map;

/**
 * 对一些常用数据进行操作的工具类
 * 
 */
public class DataOptUtil {
	
	
	/** 日期长格式 */
	public static final String DATE_PATTERN_LONG = "yyyy-MM-dd HH:mm:ss";
	/** 日期格式 */
	public static final String DATE_PATTERN = "yyyy-MM-dd";
	
	public static boolean isNotNull(String str){
		if(null != str && !"".equals(str)){
			return true;
		}else{
			return false;
		}
	}
	
	public static int parseInt(String str){
		if(isNotNull(str)){
			return Integer.parseInt(str);
		}else{
			throw new RuntimeException("字符串为空，不能转换成数字");
		}
	}
	
	public static Date parseDate(String str, String pattern){
		SimpleDateFormat sdf = new SimpleDateFormat(pattern);
		Date date = null;
		if(isNotNull(str)){
			try {
				date = sdf.parse(str);
			} catch (ParseException e) {
				e.printStackTrace();
			}
		}else{
			throw new RuntimeException("字符串为空，不能转换成日期");
		}
		return date;
	}
	
	public static Date parseDate(String str){
		return parseDate(str, DataOptUtil.DATE_PATTERN);
	}
	
	public static Date parseLongDate(String str){
		return parseDate(str, DataOptUtil.DATE_PATTERN_LONG);
	}
	
	public static String date2String(Date date, String pattern){
		SimpleDateFormat sdf = new SimpleDateFormat(pattern);
		return sdf.format(date);
	}
	
	public static String Date2String(Date date){
		return date2String(date, DataOptUtil.DATE_PATTERN);
	}
	
	public static String Date2LongString(Date date){
		return date2String(date, DataOptUtil.DATE_PATTERN_LONG);
	}
	
	public static int getSize(Collection<?> coll){
		int size = coll == null ? 0 : coll.size();
		return size;
	}
	
	public static int getSize(Map<?,?> map){
		int size = map == null ? 0 : map.size();
		return size;
	}
	
	public static int getLength(Object[] obj){
		int length = 0;
		length = obj == null ? 0 : obj.length;
		return length;
	}
}