工具类：StringUtil

/**
 * Test.java 2009-12-10 Copright(t)2009-2010 www.glodon.com.cn,All Rigths
 * Reserved
 */
package com.yltd.cnyun.common.utils;

import org.apache.commons.lang3.StringUtils;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLDecoder;
import java.security.MessageDigest;
import java.util.List;
import java.util.Random;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * @Description
 * @author 
 * @DATE 2018年8月8日
 */
public class StringUtil {

	public static boolean isBlank(String str) {
		int strLen;
		if ((str == null) || ((strLen = str.length()) == 0) || str.toLowerCase().equals("null"))
			return true;
		for (int i = 0; i < strLen; ++i) {
			if (!(Character.isWhitespace(str.charAt(i)))) {
				return false;
			}
		}
		return true;
	}

	public static String replaceStar(String str, int start, int end) {
		int strLen;
		if ((str == null) || ((strLen = str.length()) == 0) || str.toLowerCase().equals("null"))
			return "";
		StringBuffer sb = new StringBuffer();
		for (int i = 0; i < strLen; ++i) {
			if (i < start) {
				sb.append(str.charAt(i));
			} else if (i <= end) {
				sb.append("*");
			} else {
				sb.append(str.charAt(i));
			}
		}
		return sb.toString();
	}

	/**
	 * 解决split函数的一个问题： 比如有个字符串String a =
	 * "a,b,c";那么a.split(",");返回的是一个String型的数组长度为3， 若字符串a = "a,,c"
	 * 执行a.split(",");返回的也是长度为3的字符串数组， 若a = "a,,"
	 * 执行a.split(",");此时返回的是个长度为1的字符串数组,把后面的就给去了， 如果程序中用到了后面的字符，就会引起数组越界的错误，
	 * 可以将a = "a,,"在加一个字符a = "a,,,end"，这样虽然改变了数组的长度但是不会产生数组越界的错误。
	 * */
	public static String[] strSplit(String str) {

		if (StringUtil.isBlank(str))
			return null;

		if (',' == (str.charAt(str.length() - 1))) {
			str += ",END";
		}

		return str.split(",");
	}

	public static String[] strSplit(String str, int len) {

		if (StringUtil.isBlank(str))
			return new String[len];

		return strSplit(str);
	}

	/**
	 * 将2进制字符串进行按位或操作(实质是:权限值相加)
	 * */
	public static String getBinAddStr(String one, String two) {

		StringBuffer buf = new StringBuffer();

		if (one.length() != two.length())
			return null;

		for (int i = 0; i < one.length(); i++) {
			int v1 = one.charAt(i) == '1' ? 1 : 0;
			int v2 = two.charAt(i) == '1' ? 1 : 0;
			if ((v1 + v2) > 0)// 说明其中一位是1
				buf.append("1");
			else
				buf.append("0");
		}

		return buf.toString();
	}

	/**
	 * 校验是否为null或空字符 StringUtil.isNullOrEmpty()

	 * 

	 * Author : luyujian
	 * 
	 * 

	 * Date : 2013-8-19
	 * 
	 *
	 * @param str
	 * @return
	 */
	public static boolean isNullOrEmpty(Object str) {
		return str == null || "".equals(str.toString());
	}

	/**
	 * 校验集合中是否存在null或空字符 StringUtil.isNullOrEmpty()

	 * 

	 * Author : luyujian
	 * 
	 * 

	 * Date : 2013-8-23
	 * 
	 *
	 * @param objs
	 * @return
	 */
	public static boolean isNullOrEmpty(Object... objs) {
		if (objs == null || objs.length == 0) {
			return true;
		}
		for (Object obj : objs) {
			if (isNullOrEmpty(obj)) {
				return true;
			}
		}
		return false;
	}

	/**
	 * 正则过滤字符串 StringUtil.getRegValue()

	 * 

	 * Author : luyujian
	 * 
	 * 

	 * Date : 2013-8-22
	 * 
	 *
	 * @param str
	 * @param key
	 */
	public static String getRegValue(String str, String key) {
		if (StringUtil.isNullOrEmpty(str) || StringUtil.isNullOrEmpty(key)) {
			return "";
		}
		String reg = ".*" + key + "\":\"(.*)\".*";
		Pattern pattern = Pattern.compile(reg);
		Matcher matcher = pattern.matcher(str);
		while (matcher.find()) {
			return matcher.group(1);
		}
		return "";
	}

	public static String getCommonRegValue(String str, String reg) {
		if (StringUtil.isNullOrEmpty(str, reg)) {
			return "";
		}
		Pattern pattern = Pattern.compile(reg);
		Matcher matcher = pattern.matcher(str);
		while (matcher.find()) {
			return matcher.group(0);
		}
		return "";
	}

	/**
	 * 获得库巴品牌信息 StringUtil.getBrandRegValue()

	 * 

	 * Author : luyujian
	 * 
	 * 

	 * Date : 2013-8-22
	 * 
	 *
	 * @param str
	 */
	public static void getBrandRegValue(String str) {
		String reg = "brand_id:(\\w+),brand_name:([\u4e00-\u9fa5]+)";
		Pattern pattern = Pattern.compile(reg);
		Matcher matcher = pattern.matcher(str);
		while (matcher.find()) {
			System.out.print(matcher.group(1));
			System.out.print("=");
			System.out.print(matcher.group(2));
			System.out.println();
		}
	}

	/**
	 * byte转16进制字符串 StringUtil.byte2hex()

	 * 

	 * Author : luyujian
	 * 
	 * 

	 * Date : 2013-8-28
	 * 
	 *
	 * @param bytes
	 * @return
	 */
	public static String byte2hex(byte[] bytes) {
		StringBuilder sign = new StringBuilder();
		for (int i = 0; i < bytes.length; i++) {
			String hex = Integer.toHexString(bytes[i] & 0xFF);
			if (hex.length() == 1) {
				sign.append("0");
			}
			sign.append(hex.toUpperCase());
		}
		return sign.toString();
	}

	/**
	 * md5加密 StringUtil.encryptMD5()

	 * 

	 * Author : luyujian
	 * 
	 * 

	 * Date : 2013-8-28
	 * 
	 *
	 * @param data
	 * @return
	 * @throws IOException
	 */
	public static byte[] encryptMD5(String data) {
		byte[] bytes = null;
		try {
			MessageDigest md = MessageDigest.getInstance("MD5");
			bytes = md.digest(data.getBytes("utf-8"));
		} catch (Exception e) {
			e.printStackTrace();
		}
		return bytes;
	}

	/**
	 * URL decode StringUtil.decode()

	 * 

	 * Author : luyujian
	 * 
	 * 

	 * Date : 2013-8-29
	 * 
	 *
	 * @param str
	 * @return
	 */
	public static String decode(String str) {
		if (StringUtil.isNullOrEmpty(str)) {
			return "";
		}
		try {
			return URLDecoder.decode(str, "utf-8");
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
			return "";
		}
	}

	/**
	 * url decode StringUtil.decode()

	 * 

	 * Author : luyujian
	 * 
	 * 

	 * Date : 2013-9-2
	 * 
	 *
	 * @param str
	 * @param enc
	 * @return
	 */
	public static String decode(String str, String enc) {
		if (StringUtil.isNullOrEmpty(str)) {
			return "";
		}
		try {
			return URLDecoder.decode(str, enc);
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
			return "";
		}
	}

	/**
	 * 生成length位随机数
	 *
	 * @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));
			} else if ("num".equalsIgnoreCase(charOrNum)) {// 数字
				val += String.valueOf(random.nextInt(10));
			}
		}
		return val;
	}

	/**
	 * 对身份证，银行卡号的处理
	 *
	 * @param str
	 * @return
	 */
	public static String replcceStr(String str) {
		if (!StringUtils.isNotBlank(str)) {
			return null;
		} else {
			String pre = str.substring(0, 3);
			String suf = str.substring(str.length() - 4, str.length());
			return pre + "************" + suf;
		}
	}

	/**
	 * 去除空格
	 *
	 * @param str
	 * @return
	 */
	public static String trim(String str) {
		if (!StringUtils.isNotBlank(str)) {
			return null;
		} else {
			return str.replaceAll(" ", "");
		}
	}

	/**
	 * 用户名显示规则修改为只显示首尾各一位 中间位数统一用五位“*”替换
	 *
	 * @param str
	 * @return
	 */
	public static String replaceStar(String str) {
		int strLen = str.length();
		if (str == null || strLen == 0 || str.toLowerCase().equals("null"))
			return "";
		StringBuffer sb = new StringBuffer();
		for (int i = 0; i < strLen; ++i) {

		}
		sb.append(str.substring(0, 1));
		sb.append("*****");
		sb.append(str.substring(strLen - 1, strLen));
		return sb.toString();
	}

	/**
	 * 判断权限串中，有无给定值的权限
	 * */
	public static boolean hasRight(String rightstr, int rcode) {

		if (null == rightstr || rightstr.length() < rcode)
			return false;
		return rightstr.charAt(rcode - 1) == '1';
	}

	public static String getstrFromUrl(String urladdress, String sendstr) {
		StringBuffer resbu = new StringBuffer();
		try {
			URL url = new URL(urladdress);
			HttpURLConnection connection = (HttpURLConnection) url.openConnection();
			connection.setRequestMethod("POST");

			PrintWriter out = new PrintWriter(connection.getOutputStream());
			out.println(sendstr);
			out.close();

			BufferedReader in = new BufferedReader(new InputStreamReader(
					connection.getInputStream()));
			String line;
			while ((line = in.readLine()) != null) {
				resbu.append(line);
			}
			in.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
		return resbu.toString();
	}

	public static boolean startCheck(String reg, String string) {

		boolean tem = false;
		Pattern pattern = Pattern.compile(reg);
		Matcher matcher = pattern.matcher(string);
		tem = matcher.matches();

		return tem;
	}

	/**
	 * 手机号码验证,11位，不知道详细的手机号码段，只是验证开头必须是1和位数
	 * */
	public static boolean checkCellPhone(String cellPhoneNr) {

		String reg = "^[1][\\d]{10}";
		return startCheck(reg, cellPhoneNr);
	}

	/**
	 * 检查EMAIL地址 用户名和网站名称必须>=1位字符 地址结尾必须是2位以上，如：cn,test,com,info
	 * */
	public static boolean checkEmail(String email) {

		String regex = "\\w+\\@\\w+\\.\\w{2,}";
		return startCheck(regex, email);
	}

	/***
	 * 字符串所在位置
	 *
	 * @param substr
	 *            长字符串
	 * @param str
	 *            所查找字符串
	 * @param splitstr
	 *            分隔符
	 * @return
	 */
	public static String getSplitIndex(String substr, String str, String splitstr) {
		if (isBlank(substr) || isBlank(str))
			return "";
		String[] strs = substr.split(",");
		for (int i = 0; i < strs.length; i++) {
			if (strs[i].equals(str))
				return String.valueOf(i);
		}
		return "";
	}

	/**
	 * 全角转半角
	 *
	 * @param input
	 * @return
	 */
	public static String toHalfStr(String input) {
		char c[] = input.toCharArray();
		for (int i = 0; i < c.length; i++) {
			if (c[i] == '\u3000') {
				c[i] = ' ';
			} else if (c[i] > '\uFF00' && c[i] < '\uFF5F') {
				c[i] = (char) (c[i] - 65248);

			}
		}
		String returnString = new String(c);

		return returnString;
	}

	/**
	 * 半角转全角
	 *
	 * @param input
	 * @return
	 */
	public static String ToFullStr(String input) {
		char c[] = input.toCharArray();
		for (int i = 0; i < c.length; i++) {
			if (c[i] == ' ') {
				c[i] = '\u3000'; // 采用十六进制,相当于十进制的12288
			} else if (c[i] < '\177') { // 采用八进制,相当于十进制的127
				c[i] = (char) (c[i] + 65248);
			}
		}
		return new String(c);
	}

	/**
	 * 对用户输入进行清理$（美元符号） [5] %（百分比符号） [6] @（at 符号） [7] '（单引号） [8] "（引号） [9]
	 * \'（反斜杠转义单引号） [10] \"（反斜杠转义引号） [11] <>（尖括号） [12] ()（括号） [13] +（加号） [14]
	 * CR（回车符，ASCII 0x0d） [15] LF（换行，ASCII 0x0a） [16] ,（逗号） [17] \（反斜杠）
	 * */
	public static String replaceStr(String str) {
		str = str.replace("'", "‘");
		str = str.replace("|", "｜");
		str = str.replace("&", "＆");
		str = str.replace(";", "；");
		str = str.replace("@", "＠");
		str = str.replace("\"", "”");
		str = str.replace("\\'", "＼’");
		str = str.replace("\\\"", "＼＼‘");
		str = str.replace("<", "《");
		str = str.replace(">", "》");
		str = str.replace("(", "（");
		str = str.replace(")", "）");
		str = str.replace("\\(", "（");
		str = str.replace("\\)", "）");
		str = str.replace("+", "＋");
		str = str.replace("\\+", "＋");
		str = str.replace("\r", "");
		str = str.replace("\n", "");
		str = str.replace("script", "　s　c　r　i　p　t　");
		str = str.replace("SCRIPT", "　s　c　r　i　p　t　");
		str = str.replace("%27", "");
		str = str.replace("%22", "");
		str = str.replace("%3E", "");
		str = str.replace("%3C", "");
		str = str.replace("%3D", "");
		str = str.replace("%2F", "");
		return str;
	}

	public static String join(String separator, List strings) {
		if (null == strings || strings.size() == 0 || strings.isEmpty())
			return null;
		String[] stringarray = new String[strings.size()];
		for (int i = 0; i < strings.size(); i++) {
			stringarray[i] = strings.get(i);
		}
		return join(separator, stringarray);
	}

	public static String join(String separator, String[] stringarray) {
		if (stringarray == null)
			return null;
		else
			return join(separator, stringarray, 0, stringarray.length);
	}

	public static String join(String separator, String[] stringarray, int startindex, int count) {
		String result = "";
		if (stringarray == null)
			return null;
		for (int index = startindex; index < stringarray.length && index - startindex < count; index++) {
			if (separator != null && index > startindex)
				result += separator;
			if (stringarray[index] != null)
				result += stringarray[index];
		}
		return result;
	}

	public static String urlDecode(String str) {
		try {
			str = URLDecoder.decode(str, "UTF-8");
		} catch (Exception e) {
			e.printStackTrace();
		}
		return str;
	}

	public static String concatString(String first,String end){
		StringBuffer sb=new StringBuffer();
		boolean fflag=isBlank(first);
		boolean eflag=isBlank(end);
		if(!(fflag||eflag)){
			sb.append(first);
			sb.append(",");
			sb.append(end);
		}else if(!fflag&&eflag){
			sb.append(first);
		}else if(fflag&&!eflag){
			sb.append(end);
		}
		return sb.toString();
	}
	
	public static boolean hasLength(CharSequence str) {
		return (str != null && str.length() > 0);
	}
	
	public static boolean containsWhitespace(CharSequence str) {
		if (!hasLength(str)) {
			return false;
		}
		int strLen = str.length();
		for (int i = 0; i < strLen; i++) {
			if (Character.isWhitespace(str.charAt(i))) {
				return true;
			}
		}
		return false;
	}

}