英文和数字之间的转换 java

package test;
/*Task: 英文和阿拉伯数字之间的转换
 *
 * Date:2014.02.24
 *
 * Author ：璀若星辰
 *
 * */
import java.util.HashMap;
import java.util.Scanner;
public class NumberWordFormat {
	  public static final String ZERO = "zero";
	  public static final String NEGATIVE = "negative";
	  public static final String SPACE = " ";
	  public static final String MILLION = "million";
	  public static final String THOUSAND = "thousand";
	  public static final String HUNDRED = "hundred";
	  public static final String[] INDNUM = {"zero", "one", "two", "three", "four", "five", "six",
	    "seven", "eight", "nine", "ten", "eleven", "twelve", "thirteen",
	    "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
	  public static final String[] DECNUM = {"twenty", "thirty", "forty", "fifty", "sixty",
	    "seventy", "eighty", "ninety"};

	  //数字转换英文
	  public String format(int i) {

	    StringBuilder sb = new StringBuilder();

	    if(i == 0) {
	      return ZERO;
	    }

	    if(i < 0) {
	      sb.append(NEGATIVE).append(SPACE);
	      i *= -1;
	    }


	    if(i >= 1000000) {
	      sb.append(numFormat(i / 1000000)).append(SPACE).append(MILLION).append(SPACE);
	      i %= 1000000;

	    }

	    if(i >= 1000) {
	      sb.append(numFormat(i / 1000)).append(SPACE).append(THOUSAND).append(SPACE);

	      i %= 1000;
	    }

	    if(i < 1000){
	      sb.append(numFormat(i));
	    }

	    return sb.toString();
	  }

	  // 3位数转英文
	  public String numFormat(int i) {

	    StringBuilder sb = new StringBuilder();

	    if(i >= 100) {
	      sb.append(INDNUM[i / 100]).append(SPACE).append(HUNDRED).append(SPACE);
	    }

	    i %= 100;

	    if(i != 0) {
	      if(i >= 20) {
	        sb.append(DECNUM[i / 10 -2]).append(SPACE);
	        if(i % 10 != 0) {
	          sb.append(INDNUM[i % 10]);
	        }
	      }else {
	        sb.append(INDNUM[i]);
	      }
	    }

	    return sb.toString();
	  }
	//英文转数字
	  public int parse(String str) {
	    HashMap<String, Integer> hm = new HashMap<String, Integer>();
	    hm.put("zero", 0);
	    hm.put("one", 1);
	    hm.put("two", 2);
	    hm.put("three", 3);
	    hm.put("four", 4);
	    hm.put("five", 5);
	    hm.put("six", 6);
	    hm.put("seven", 7);
	    hm.put("eight", 8);
	    hm.put("nine", 9);
	    hm.put("ten", 10);
	    hm.put("eleven", 11);
	    hm.put("twelve", 12);
	    hm.put("thirteen", 13);
	    hm.put("fourteen", 14);
	    hm.put("fifteen", 15);
	    hm.put("sixteen", 16);
	    hm.put("seventeen", 17);
	    hm.put("eighteen", 18);
	    hm.put("nineteen", 19);
	    hm.put("twenty", 20);
	    hm.put("thirty", 30);
	    hm.put("forty", 40);
	    hm.put("fifty", 50);
	    hm.put("sixty", 60);
	    hm.put("seventy", 70);
	    hm.put("eighty", 80);
	    hm.put("ninety", 90);
	    hm.put("hundred", 100);
	    hm.put("thousand", 1000);
	    hm.put("million", 1000000);
	    int i = 0;
	    int b = 0;
	    int c = 0;
	    String[] k = str.split(" ");
	    for (String string : k) {
	      if("hundred".equals(string)){
	        i *= hm.get("hundred");
	      }else if("thousand".equals(string)){
	        b = i;
	        b *= hm.get("thousand");
	        i = 0;
	      }else if("million".equals(string)){
	        c = i;
	        c *= hm.get("million");
	        i = 0;
	      }else if("negative".equals(string)){
	        i = 0;
	      }else {
	        i += hm.get(string);
	      }
	    }
	    i += c + b;
	    for (String string2 : k) {
	      if("negative".equals(string2)){
	        i = -i;
	      }
	    }
	    return i;
	  }
	  public static void main(String[] args) {
//			NumberWordFormat nwf = new NumberWordFormat();
//			System.out.println(nwf.format(1432008));
//			int  i = nwf.parse("one million four hundred thirty two thousand eight");
//			System.out.println("i="+i);
		  NumberWordFormat numberWordFormat = new NumberWordFormat();
		    Boolean flag = false;
		    Scanner sc = new Scanner(System.in);
		    try {
		      do {
		        System.out.println("请选择format还是parse，format输入1，parse输入2");
		        String input = sc.nextLine();
		        if("1".equals(input)){
		          System.out.println("您选择了format，请输入数字 （注：范围在999999999和-999999999之间）:");
		          input = sc.nextLine();
		          int num = Integer.parseInt(input);
		          if(num > 999999999 || num< -999999999 || input.length() > String.valueOf(num).length()){
		            throw new NumberFormatException();
		          }
		          System.out.println("转换结果为： " + numberWordFormat.format(num));
		        }else if("2".equals(input)){
		          System.out.println("您选择了parse，请输入英文数字,注意格式（每输入一个单词后一空格）:");
		          input = sc.nextLine();
		          try {
		            System.out.println("转换结果为： " + numberWordFormat.parse(input));
		          } catch (Exception e) {
		            System.out.println("请输入正确的英文单词及格式!!重新输入!!");
		          }
		        }else {
		          System.out.println("输入错误，请重新输入！！");
		        }
		        System.out.println("是否继续？<Y/N>");
		        input = sc.nextLine();
		        if("Y".equalsIgnoreCase(input)){
		          flag = true;
		        }else {
		          flag = false;
		        }
		      } while (flag);
		    } finally {
		      sc.close();
		    }
		  }
}

英文和数字之间的转换 java

原文：http://blog.csdn.net/u012631267/article/details/19823253