JAVA学习笔记_小写数字转换成大写且带单位_金额小写转大写

java

import java.text.DecimalFormat;
import java.text.NumberFormat;

public class MoneyUtil {
	
	//总体思路：
	//对数字进行分级处理，级长为4
	//对分级后的每级分别处理，处理后得到字符串相连
	//如：123456=12|3456
	//第二级：12=壹拾贰 + “万”
	//第一级：3456 =叁千肆百伍拾陆 + “”
	
	  private double amount = 0.0D;
	  private static final String NUM = "零壹贰叁肆伍陆柒捌玖";
	  private static final String UNIT = "仟佰拾个";
	  private static final String GRADEUNIT = "仟万亿兆";
	  private static final String DOTUNIT = "角分厘";
	  private static final int GRADE = 4;
	  private static final String SIGN = "￥";
	  private static final NumberFormat nf = new DecimalFormat("#0.###");
	  
	  public static String toBig(String str){
		  String ret="";
		  for (int i=0;i<str.length();i++){
			  String temp=str.substring(i, i+1);
			  int n=Integer.parseInt(temp);
			  ret+=NUM.substring(n, n+1);
		  }
		  
		  return ret;
		  
	  }
	  
	  public MoneyUtil(double amount) {
	    this.amount = amount;
	  }
	  public String toBigAmt(){
	    return toBigAmt(this.amount);
	  }
	  public static String toBigAmt(double amount){
	    String amt = nf.format(amount);
	    Double d = new Double(amount);
	    String dotPart = ""; //取小数位
	    String intPart = ""; //取整数位
	    int dotPos;
	    if ( (dotPos = amt.indexOf('.')) != -1) {
	      intPart = amt.substring(0, dotPos);
	      dotPart = amt.substring(dotPos + 1);
	    }
	    else {
	      intPart = amt;
	    }
	    if(intPart.length() > 16) throw new java.lang.InternalError("The amount is too big.");
	    String intBig = intToBig(intPart);
	    String dotBig = dotToBig(dotPart);
	    //以下代码稍做修改，现在是完美的代码啦！
	    if ((dotBig.length() == 0)&&(intBig.length() != 0)) {
	      return intBig + "元";//整
	    }else if((dotBig.length() == 0)&&(intBig.length() == 0)){
	      return intBig + "零元";  
	    }else if((dotBig.length() != 0)&&(intBig.length() != 0)) {
	      return intBig + "元" + dotBig;
	    }else{
	      return dotBig;  
	    }
	/*
	    if(dotBig.length() == 0) return intBig +"元整";
	    else return intBig + "元" + dotBig;
	*/
	  }
	  private static String dotToBig(String dotPart){
	      //得到转换后的大写（小数部分）
	    String strRet = "";
	    for(int i=0; i<dotPart.length() && i<3; i++){
	      int num;
	      if((num = Integer.parseInt(dotPart.substring(i,i+1))) != 0)
	        strRet += NUM.substring(num,num+1) + DOTUNIT.substring(i,i+1);
	    }
	    return strRet;
	  }
	  public static String intToBig(String intPart){
	      //得到转换后的大写（整数部分）
	      int grade; //级长
	      String result = "";
	      String strTmp = "";
	      //得到当级长
	      grade = intPart.length() / GRADE;
	      //调整级次长度
	      if(intPart.length() % GRADE != 0) grade += 1;
	      //对每级数字处理
	      for(int i = grade; i >= 1; i--){
	          strTmp = getNowGradeVal(intPart, i);//取得当前级次数字
	          result += getSubUnit(strTmp);//转换大写
	          result = dropZero(result);//除零
	          //加级次单位
	          if( i>1 ) //末位不加单位
	              //单位不能相连续
	              if(getSubUnit(strTmp).equals("零零零零")){
	                  result += "零"+GRADEUNIT.substring(i - 1, i);
	              }else{
	                  result += GRADEUNIT.substring(i - 1, i);
	              }
	      }
	      return result;
	  }
	  private static String getNowGradeVal(String strVal,int grade){
	      //得到当前级次的串
	      String rst;
	      if(strVal.length() <= grade * GRADE)
	          rst = strVal.substring(0,strVal.length() - (grade-1)*GRADE);
	      else
	          rst = strVal.substring(strVal.length() - grade*GRADE,strVal.length() - (grade-1)*GRADE);
	      return rst;
	  }
	  private static String getSubUnit(String strVal){
	      //数值转换
	      String rst = "";
	      for(int i = 0;i< strVal.length(); i++){
	          String s = strVal.substring(i,i+1);
	          int num = Integer.parseInt(s);
	          if(num == 0){
	              //“零”作特殊处理
	              if(i != strVal.length()) //转换后数末位不能为零
	                  rst += "零";
	          }else{
	              //If IntKey = 1 And i = 2 Then
	                  //“壹拾”作特殊处理
	                  //“壹拾”合理
	              //Else
	                  rst += NUM.substring(num,num+1);
	              //End If
	              //追加单位
	              if(i != strVal.length()-1 )//个位不加单位
	                rst += UNIT.substring(i+4-strVal.length(),i+4-strVal.length()+1);
	          }
	      }
	      return rst;
	  }
	  private static String dropZero(String strVal){
	      //去除连继的“零”
	      String strRst;
	      String strBefore; //前一位置字符
	      String strNow;    //现在位置字符
	      strBefore = strVal.substring(0,1);
	      strRst = strBefore;
	      for(int i= 1; i<strVal.length(); i++) {
	          strNow = strVal.substring(i, i+1);
	          if(strNow.equals("零") && strBefore.equals("零"))
	              ;//同时为零
	          else
	              strRst += strNow;
	          strBefore = strNow;
	      }
	      //末位去零
	      if(strRst.substring(strRst.length()-1, strRst.length()).equals("零"))
	        strRst = strRst.substring(0,strRst.length()-1);
	      return strRst;
	  }
	  
	  public static void main(String[] args){
		    System.out.println(MoneyUtil.toBigAmt(1000000));
		    System.out.println(MoneyUtil.toBigAmt(0.00D));
		    System.out.println(MoneyUtil.toBigAmt(0.60D));
		    System.out.println(MoneyUtil.toBigAmt(00.60D));
		    System.out.println(MoneyUtil.toBigAmt(150.2101D));
		    System.out.println(MoneyUtil.toBigAmt(15400089666.234D));
		    System.out.println(MoneyUtil.toBigAmt(22200004444.2347D));
	  }
} 

console

壹佰万元
零元
陆角
陆角
壹佰伍拾元贰角壹分
壹佰伍拾肆亿零捌万玖仟陆佰陆拾陆元贰角叁分肆厘
贰佰贰拾贰亿零万肆仟肆佰肆拾肆元贰角叁分伍厘