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/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package com.kukababy.utils;

import java.util.regex.Pattern;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;



/**
 * @describe 描述
 * @author [email protected]
 * @date 2014-3-26
 */
public class StringUtil {

	private static final Logger log = LoggerFactory.getLogger(StringUtil.class);
	
	private static final char zero = '0';
	private static final char nine = '9';
	private static final char minus = '-';
	private static final char point = '.';

	private static Pattern IntReg = Pattern.compile("[1-9][0-9]{0,9}");

	public static Pattern NumberReg = Pattern.compile("^-?[0-9]{0,20}(\\.[0-9]{1,6})?$");
	
	public static void main(String args[]){
		String str = "10000.1.1" ; 
		isNumber(str);
		long s1 = System.currentTimeMillis();
		
		for(int i=0;i<1000;i++){
			//boolean flag = isNumber(str);
			//if(flag){
				//log.info(""+Double.parseDouble(str));
			//}
		}
		
		for(int i=0;i<10000;i++){
			 //str2Number(str);
		}
		
		log.info(""+Long.parseLong("-0"));
		long s2 = System.currentTimeMillis();
		
		log.info(""+(s2-s1));
		
		Object obj = str2Number("111011112");
		if(obj instanceof String){
			log.info("String = "+obj);
		}else if (obj instanceof Integer){
			log.info("Integer = "+obj);
		}else if (obj instanceof Long){
			log.info("Long = "+obj);
		}else if (obj instanceof Double){
			log.info("Double = "+obj);
		}
		
		
	}

	/**
	 * 判断字符串是否为数值型

	 * 
	 * @param val
	 * @return
	 */
	public static boolean isNumber(String val) {
		return NumberReg.matcher(val).matches();
	}
	
	/**
	 * 判断字符串是否为正整数

	 * 
	 * @param val
	 * @return
	 */
	public static boolean isPInt(String val) {
		return IntReg.matcher(val).matches();
	}
	
	/**
	 * 把字符串转换成整数、长整数、Double和string 4种类型

	 * 
	 * @param val
	 * @return
	 */
	public static Object str2Number(String val) {
		int len = val.length();
		if (len == 0||len > 18) {
			return val;
		}

		if (len == 1) {
			char firstChar = val.charAt(0);
			if (firstChar == zero) {
				return 0;
			} else if (firstChar == minus) {
				return "-";
			} else if (firstChar == point) {
				return ".";
			}
		}
		boolean hasPoint = false;
		char mChar[] = val.toCharArray() ;
		for (int i = 0; i < mChar.length; i++) {
			if (mChar[i] == minus) {// 如果是减号
				if (i == 0) {// 第一次出现减号，继续判断
					continue;
				} else {
					return val;// 字符串
				}
			}
			if (mChar[i] == point) {
				if (hasPoint) {// 出现2次
					return val;// 字符串
				} else {
					hasPoint = true;
					continue;
				}
			}
			if (zero <= mChar[i] && mChar[i] <= nine) {
				continue;
			} else {
				return val;// 字符串
			}
		}

		if (hasPoint) {// 有小数点
			return Double.parseDouble(val);// 有小数点，double类型
		} else {
			if(mChar[0]==zero){
				return val;// 字符串 01
			}
			if(mChar[0]==minus&&mChar[1]==zero){
				return val;// 字符串 -01
			}
			if (len < 10) {
				return Integer.parseInt(val);// 整数
			} else {
				return Long.parseLong(val);// 长整数
			}
		}
	}
	/**
	 * 
	 * 描述:
	 * 
	 * 	 * 数值转换固定位数的字符串
	 * 
	 * 
	 * @param len
	 * @param value
	 * @return
	 */
	public static String toFixDigit(int len, int value) {
		String v = Integer.toString(value);
		int i = len - v.length();
		StringBuffer buf = new StringBuffer("");
		while (i-- > 0) {
			buf.append(0);
		}
		buf.append(value);

		return buf.toString();
	}

	

}