工具类

import java.io.UnsupportedEncodingException;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;import net.fortunes.admin.AdminHelper;import net.fortunes.admin.model.Dict;import net.sf.json.JSONObject;import org.apache.commons.lang.StringUtils;public class AppHelper extends AdminHelper {		public static String[] chineseDigits = new String[] { "零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"};			public static String getMD5Str(String str) {  		MessageDigest messageDigest = null;        try {          	messageDigest = MessageDigest.getInstance("MD5");              messageDigest.reset();	        messageDigest.update(str.getBytes("UTF-8"));          } catch (NoSuchAlgorithmException e) {              return null;        } catch (UnsupportedEncodingException e) {              return null;          }            byte[] byteArray = messageDigest.digest();           StringBuffer md5StrBuff = new StringBuffer();          for (int i = 0; i < byteArray.length; i++) {                          if (Integer.toHexString(0xFF & byteArray[i]).length() == 1)                  md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i]));              else                  md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i]));           }             return md5StrBuff.toString().toUpperCase();  	} 		/**         * 把金额转换为汉字表示的数量，小数点后四舍五入保留两位         * @param amount         * @return         */         public static String amountToChinese(double amount) {                   if(amount > 99999999999999.99 || amount < -99999999999999.99)                  throw new IllegalArgumentException("参数值超出允许范围 (-99999999999999.99 ～ 99999999999999.99)！");                   boolean negative = false;              if(amount < 0) {                  negative = true;                  amount = amount * (-1);              }                   long temp = Math.round(amount * 100);              int numFen = (int)(temp % 10); // 分              temp = temp / 10;              int numJiao = (int)(temp % 10); //角              temp = temp / 10;              //temp 目前是金额的整数部分                   int[] parts = new int[20]; // 其中的元素是把原来金额整数部分分割为值在 0~9999 之间的数的各个部分              int numParts = 0; // 记录把原来金额整数部分分割为了几个部分（每部分都在 0~9999 之间）              for(int i=0; ; i++) {                  if(temp ==0)                      break;                  int part = (int)(temp % 10000);                  parts[i] = part;                  numParts ++;                  temp = temp / 10000;              }                   boolean beforeWanIsZero = true; // 标志“万”下面一级是不是 0                   String chineseStr = "";              for(int i=0; i
    
      0) // 如果"万"的部分不为 0, 而"万"前面的部分小于 1000 大于 0， 则万后面应该跟“零”                                  chineseStr = "零" + chineseStr;                              chineseStr = "万" + chineseStr;                          }                      }                  }                  chineseStr = partChinese + chineseStr;              }                   if("".equals(chineseStr))  // 整数部分为 0, 则表达为"零元"                  chineseStr = chineseDigits[0];              else if(negative) // 整数部分不为 0, 并且原金额为负数                  chineseStr = "负" + chineseStr;                   chineseStr = chineseStr + "元";                   if(numFen == 0 && numJiao == 0) {                  chineseStr = chineseStr + "整";              }              else if(numFen == 0) { // 0 分，角数不为 0                  chineseStr = chineseStr + chineseDigits[numJiao] + "角";              }              else { // “分”数不为 0                  if(numJiao == 0)                      chineseStr = chineseStr + "零" + chineseDigits[numFen] + "分";                  else                     chineseStr = chineseStr + chineseDigits[numJiao] + "角" + chineseDigits[numFen] + "分";              }                   return chineseStr;               }                    /**         * 把一个 0~9999 之间的整数转换为汉字的字符串，如果是 0 则返回 ""         * @param amountPart         * @return         */         private static String partTranslate(int amountPart) {                   if(amountPart < 0 || amountPart > 10000) {                  throw new IllegalArgumentException("参数必须是大于等于 0，小于 10000 的整数！");              }                        String[] units = new String[] {"", "拾", "佰", "仟"};                   int temp = amountPart;                   String amountStr = new Integer(amountPart).toString();              int amountStrLength = amountStr.length();              boolean lastIsZero = true; //在从低位往高位循环时，记录上一位数字是不是 0              String chineseStr = "";                   for(int i=0; i