WebTool

package com.jbx.util;


import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.servlet.http.HttpServletRequest;


public class WebTool {
	
	

	/** 判断两个字符串是否相等 */
	public static boolean equalsIgnoreCase(String value1, String value2) {
		if (value1 != null && value1.equalsIgnoreCase(value2))
			return true;
		return false;
	}
    /**判断对象是否为空 
     *@param object Object
     *@return boolean
     */
    public static boolean isNull(Object object) {
        return null == object;
    }
	/** 判断整型变量是否为空 */
	public static boolean isNull(Integer value) {
		return value == null || value.intValue() < 0;
	}
	
	/** 判断字符串是否为空或零长度 */
	public static boolean isNull(String value) {
		return  null==value || value.length() == 0;
	}
	/** 判断List是否为空*/
    public static boolean isNullList(List list) {
        return (isNull(list) || list.size() <= 0);
    }

	public static String goUpperCase(String value){
		if(null==value){
			return null;
		}else{
			return value.toUpperCase();
		}
		
	}
	
	
	/** 判断一个字符串是否全部是数字0-9组成 */
	public static boolean isIntString(String value) {
		if (isNull(value))
			return false;
		for (int i = 0; i < value.length(); i++) {
			if (!isInt(value.charAt(i)))
				return false;
		}
		return true;
	}
	
	/** 正则表达式效验 */
	public static boolean checkRegular(String str, String regex) {
		Pattern pattern = Pattern.compile(regex);
		Matcher matcher = pattern.matcher(str);
		return matcher.matches();
	}
	
	
	/** 判断一个字符是否是数字0-9 */
	public static boolean isInt(char c) {
		return (c >= '0' && c <= '9');
	}
	/**
	 * 获取Get方式的Ajax请求参数解码值
	 * 
	 * @param paramValue
	 * @return
	 */
	public static String getDecodedValue(String value) {
		if (value == null) {
			return value;
		}
		try {
			return URLDecoder.decode(value, "UTF-8");
		} catch (UnsupportedEncodingException e) {
			return null;
		}
	}

	
	
	/** 获得中文格式的时间字符串 */
	public static String getDateFormatCnStr(Date date, String pattern) {
		if (date == null)
			return "";
		String result = null;
		try {
			SimpleDateFormat sdf = new SimpleDateFormat(pattern,
					Locale.SIMPLIFIED_CHINESE);
			result = sdf.format(date);
		} catch (Exception e) {
			System.out.println("时间转换出错：Date" + date.toString() + ",pattern"
					+ pattern);
			e.printStackTrace();
		}
		if (!isNull(result))
			return result;
		return "";
	}
	
	
	/** 判断两个字符串是否相等 */
	public static boolean equals(String value1, String value2) {
		if (value1 != null && value1.equals(value2))
			return true;
		return false;
	}

	
	
	/** 获取IP地址 */
	public static String getIpAddr(HttpServletRequest request) {
		if (request == null)
			return "unknown";
		String ip = request.getHeader("x-forwarded-for");
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("Proxy-Client-IP");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("WL-Proxy-Client-IP");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getRemoteAddr();
		}

		if (ip.indexOf(":unknown") > 0 || ip.indexOf(": unknown") > 0) {
			do {
				ip = ip.substring(ip.indexOf("unknown"));

			} while (ip.indexOf("unknown") == 0 || ip.indexOf("unknown") == 1);
		}

		return ip;
	}
	/**
	 * 比较两个时间的间隔是否符合预定义的间隔,默认间隔为31天
	 */
	public static String checkDateLimit(String begin,String end){
		if (begin == null|| begin.trim().length() < 10) {			
			return "请填写正确的查询开始时间！";
		}
		if (end == null|| end.trim().length() < 10) {			
			return "请填写正确的查询结束时间！";
		}
		try{
			if(DateUtil.getDistinceDay(begin,end)>31){			
				return "查询日期超出范围限制！";
			}
			else{
				return "OK";
			}
		}catch(ParseException e){
			return "请输入正确的日期格式！";
		}
		
	}
	
	
}