package util;

import java.io.UnsupportedEncodingException;
import java.util.Random;

public class StringRandomUtils {

	 private Random widthRandom = new Random();
	 private int length;
	 private static char[] charsNumber = ("0123456789").toCharArray();
	 private static char[] charsLetter = ("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ").toCharArray();
	 private static char[] charsRandom = ("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ").toCharArray();
	 private static Random random = new Random();
	 private final static int[] areaCode = {1601, 1637, 1833, 2078, 2274,
	 2302, 2433, 2594, 2787, 3106, 3212, 3472, 3635, 3722, 3730, 3858,
	 4027, 4086, 4390, 4558, 4684, 4925, 5249, 5590};
	 private final static String[] letters = {"a", "b", "c", "d", "e",
	 "f", "g", "h", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s",
	 "t", "w", "x", "y", "z"};

	 //参数为生成的字符串的长度,根据给定的char集合生成字符串数字
	 public static String randomNumber(int length) {

	 char[] data = new char[length];

	 for (int i = 0; i < length; i++) {
	 int index = random.nextInt(charsNumber.length);
	 data[i] = charsNumber[index];
	 }
	 String s = new String(data);
	 return s;
	 }

	 //参数为生成的字符串的长度,根据给定的char集合生成字符串、字母
	 public static String randomLetter(int length) {

	 char[] data = new char[length];

	 for (int i = 0; i < length; i++) {
	 int index = random.nextInt(charsLetter.length);
	 data[i] = charsLetter[index];
	 }
	 String s = new String(data);
	 return s;
	 }

	 //参数为生成的字符串的长度,根据给定的char集合生成字符串
	 public static String getStringRandom(int length) {

	 char[] data = new char[length];

	 for (int i = 0; i < length; i++) {
	 int index = random.nextInt(charsRandom.length);
	 data[i] = charsRandom[index];
	 }
	 String s = new String(data);
	 return s;
	 }

	 //简体中文
	 public static String getRandomJianHan(int length) {
	 String ret = "";
	 for (int i = 0; i < length; i++) {
	 String str = null;
	 int hightPos, lowPos;//定义高地位
	 Random random = new Random();
	 hightPos = (176 + Math.abs(random.nextInt(39))); //获取高位值
	 lowPos = (161 + Math.abs(random.nextInt(93))); //获取低位值
	 byte[] b = new byte[2];
	 b[0] = (new Integer(hightPos).byteValue());
	 b[1] = (new Integer(lowPos).byteValue());
	 try {
	 str = new String(b, "GBK");//转成中文
	 } catch (UnsupportedEncodingException ex) {
	 ex.printStackTrace();
	 }
	 ret += str;
	 }
	 return ret;
	 }

	 /*封装成带下划线的蓝色文本*/
	 public static String toBlueTextUnderLine(String text) {
	 return "<u><font color=\"#15ABF9\">" + text + "</font></u>";
	 }


	 /**
	 * 获取汉字的首字母
	 * @param x
	 * @return
	 */
	 public static String getFirstAlp(String x) {

	 String chinese = x.substring(0,1);

	 if (chinese == null || chinese.trim().length() == 0) {
	 return "";
	 }
	 chinese = conversionStr(chinese, "GB2312", "ISO8859-1");

	 if (chinese.length() > 1) // 判断是不是汉字
	 {
	 int li_SectorCode = (int) chinese.charAt(0); // 汉字区码
	 int li_PositionCode = (int) chinese.charAt(1); // 汉字位码
	 li_SectorCode = li_SectorCode - 160;
	 li_PositionCode = li_PositionCode - 160;
	 int li_SecPosCode = li_SectorCode * 100 + li_PositionCode; // 汉字区位码
	 if (li_SecPosCode > 1600 && li_SecPosCode < 5590) {
//	 ToastUtils.showShort(MyApplication.getContext(),"chinese 是汉字字符");
	 for (int i = 0; i < 23; i++) {
	 if (li_SecPosCode >= areaCode[i]
	 && li_SecPosCode < areaCode[i + 1]) {
	 chinese = letters[i];
	 break;
	 }
	 }
	 } else // 非汉字字符,如图形符号或ASCII码
	 {
//	 ToastUtils.showShort(MyApplication.getContext(),"chinese 不是汉字!!");
	 chinese = conversionStr(chinese, "ISO8859-1", "GB2312");
	 chinese = chinese.substring(0, 1);
	 }
	 }
	 return chinese;
	 }


	 /**
	 * 字符串编码转换
	 *
	 * @param str 要转换编码的字符串
	 * @param charsetName 原来的编码
	 * @param toCharsetName 转换后的编码
	 * @return 经过编码转换后的字符串
	 */
	 private static String conversionStr(String str, String charsetName, String toCharsetName) {
	 try {
	 str = new String(str.getBytes(charsetName), toCharsetName);
	 } catch (UnsupportedEncodingException ex) {
	 System.out.println("字符串编码转换异常:" + ex.getMessage());
	 }
	 return str;
	 }
}