应聘Java笔试时可能出现问题及其答案 （十三）

147、如何校验数字型?
var re=/^/d{1,8}$|/./d{1,2}$/;
var str=document.form1.all(i).value;
var r=str.match(re);
if (r==null)
{
    sign=-4;
    break;
}
else{
    document.form1.all(i).value=parseFloat(str);
}

 

148、将一个键盘输入的数字转化成中文输出
(例如:输入:1234567      输出:一百二拾三万四千五百六拾七)
用java语言实现,,请编一段程序实现!
public class Reader {
   private String strNum;
   private String strNumChFormat;
   private String strNumTemp;
   private int intNumLen;
   private String strBegin;
   public Reader(String strNum) {
     this.strNum = strNum;
   }
   public boolean check(String strNum) {
     boolean valid = false;
    
     if (strNum.substring(0,1).equals("0")){
      this.strNum = strNum.substring(1);
     }
     try {
       new Double(strNum);
       valid = true;
     }
     catch (NumberFormatException ex) {
       System.out.println("Bad number format!");
     }
     return valid;
   }
   public void init() {
     strNumChFormat = "";
     intNumLen = strNum.length();
     strNumTemp = strNum;
     strNumTemp = strNumTemp.replace('1', '一');
     strNumTemp = strNumTemp.replace('2', '二');
     strNumTemp = strNumTemp.replace('3', '三');
     strNumTemp = strNumTemp.replace('4', '四');
     strNumTemp = strNumTemp.replace('5', '五');
     strNumTemp = strNumTemp.replace('6', '六');
     strNumTemp = strNumTemp.replace('7', '七');
     strNumTemp = strNumTemp.replace('8', '八');
     strNumTemp = strNumTemp.replace('9', '九');
     strNumTemp = strNumTemp.replace('0', '零');
     strNumTemp = strNumTemp.replace('.', '点');
     strBegin = strNumTemp.substring(0, 1);
   }
   public String readNum() {
     if (check(strNum)) {
       init();
       try {
         for (int i = 1, j = 1, k = 1; i < intNumLen; i++) {
           if (strNumTemp.charAt(intNumLen - 1) == '零' && i == 1) {
             strNumChFormat = "位";
           }
           else if (strNumTemp.charAt(intNumLen - i) == '零' && j == 1) {
             strNumChFormat = "位" + strNumChFormat;
           }
           else if (strNumTemp.charAt(intNumLen - i) == '点') {
             j = 1;
             k = 1;
             strNumChFormat = strNumTemp.charAt(intNumLen - i) + strNumChFormat;
             continue;
           }
           else {
             strNumChFormat = strNumTemp.charAt(intNumLen - i) + strNumChFormat;
           }
           if (strNumTemp.charAt(intNumLen - i - 1) != '位' &&
               strNumTemp.charAt(intNumLen - i - 1) != '零') {
             if (j == 1 && i < intNumLen) {
               strNumChFormat = '拾' + strNumChFormat;
             }
             else if (j == 2 && i < intNumLen) {
               strNumChFormat = '百' + strNumChFormat;
             }
             else if (j == 3 && i < intNumLen) {
               strNumChFormat = '千' + strNumChFormat;
             }
           }
           if (j == 4 && i < intNumLen) {
             j = 0;
           }
           if (k == 4 && i < intNumLen) {
             strNumChFormat = '万' + strNumChFormat;
           }
           else if (k == 8 && i < intNumLen) {
             k = 0;
             strNumChFormat = '亿' + strNumChFormat;
           }
           j++;
           k++;
         }
         while (strNumChFormat.indexOf("位") != -1) {
           strNumChFormat = strNumChFormat.replaceAll("位", " ");
         }
         if (strNumChFormat.substring(0, 2) == "一拾") {
           strNumChFormat = strNumChFormat.substring(1, strNumChFormat.length());
         }
         if (strNumChFormat.indexOf("点") >= 0) {
           String rebegin = strNumChFormat.substring(0,
               strNumChFormat.indexOf("点"));
           String relast = strNumChFormat.substring(strNumChFormat.indexOf("点"),
               strNumChFormat.length());
           for (int i = 1; i <= relast.length(); i++) {
             relast = relast.replaceAll("拾", "");
             relast = relast.replaceAll("百", "");
             relast = relast.replaceAll("千", "");
             relast = relast.replaceAll("万", "");
             relast = relast.replaceAll("亿", "");
           }
           strNumChFormat = rebegin + relast;
         }
       }
       catch (ArrayIndexOutOfBoundsException ex) {
         ex.printStackTrace();
       }
       catch (Exception ex) {
         ex.printStackTrace();
       }
       int off = strNumChFormat.indexOf("点");
       strNumChFormat = strBegin + strNumChFormat.substring(0);
     }
     else {
       strNumChFormat = "";
     }
     return strNumChFormat;
   }
   public static void main(String args[]) {
     try {
       String number = args[0].toString();
       System.out.println("The number is: " + number);
       Reader reader = new Reader(number);
       System.out.println("Output String: " + reader.readNum());
     }
     catch (Exception ex) {
       System.out.println("Please input like that: javac Reader <number>");
     }
   }
}