java实现整数转化为中文大写金额的方法

在日常生活中，我们经常会将阿拉伯数字转化为中文大写的情况："零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖", "拾", "佰", "仟", "万", "亿"，因此自己就编写一个类，实现该功能的转化。
实现过程：
对于这个问题的实现，我们首先把数字按四位一个拆开（符合我们读数字的习惯），然后对这四位数，做出他的读法，具体代码如下：

private static String getNumberStr1000 (int num) {
 if (num > 9999 || num < 0) {
  return "";
 }
 int q = num / 1000;
 int b = (num / 100) % 10;
 int s = (num / 10) % 10;
 int g = num % 10;
 StringBuffer sb = new StringBuffer();
 //千
 if (q > 0) {
  sb.append(NUMBER1[q]);
  sb.append(NUMBER2[3]);
 }
 //百
 if (b > 0) {
  sb.append(NUMBER1[b]);
  sb.append(NUMBER2[2]);
 } else {
  if (q != 0) {
   sb.append(NUMBER2[0]);
  }
 }
 //十
 if (s > 0) {
  sb.append(NUMBER1[s]);
  sb.append(NUMBER2[1]);
 } else {
  if (b != 0) {
   sb.append(NUMBER2[0]);
  }
 }
 //个
 if (g > 0) {
  sb.append(NUMBER1[g]);
 }
 return sb.toString();
}

下面我们只需要在编写一个方法，实现每个四位数的读法以及对应的单位即可，具体代码如下：

public static String getNumberStr(int num) {
 if (num < 0) {
  return "";
 }
 if (num == 0) {
  return NUMBER1[0];
 }
 int split = 10000;
 int y = num / (split * split);
 int w = (num / split) % split;
 int g = num % split;
 StringBuffer sb = new StringBuffer();
 //亿
 if (y > 0) {
  sb.append(getNumberStr1000(y));
  sb.append(NUMBER2[5]);
 }
 //万
 if (w > 999) {
  sb.append(getNumberStr1000(w));
  sb.append(NUMBER2[4]);
 } else {
  if (w > 0) {
   if (y != 0) {
    sb.append(NUMBER2[0]);
   }
   sb.append(getNumberStr1000(w));
   sb.append(NUMBER2[4]);
  }
 }
 //万以下
 if (g > 0) {
  if (w != 0) {
   if (g > 999) {
    sb.append(getNumberStr1000(g));
   } else {
    sb.append(NUMBER2[0]);
    sb.append(getNumberStr1000(g));
   } 

  } else {
   if (y != 0) {
    sb.append(NUMBER2[0]);
   }
   sb.append(getNumberStr1000(g));
  }
 }
 return sb.toString();
}

完整源代码：

 /**
 *@Description:
 */
package com.lulei.util; 

public class NumberUtil {
 private static String[] NUMBER1 = {"零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"};
 private static String[] NUMBER2 = {"零", "拾", "佰", "仟", "万", "亿"}; 

 /**
  * @param num
  * @return
  * @Author:lulei
  * @Description:将数字转化为大写
  */
 public static String getNumberStr(int num) {
  if (num < 0) {
   return "";
  }
  if (num == 0) {
   return NUMBER1[0];
  }
  int split = 10000;
  int y = num / (split * split);
  int w = (num / split) % split;
  int g = num % split;
  StringBuffer sb = new StringBuffer();
  //亿
  if (y > 0) {
   sb.append(getNumberStr1000(y));
   sb.append(NUMBER2[5]);
  }
  //万
  if (w > 999) {
   sb.append(getNumberStr1000(w));
   sb.append(NUMBER2[4]);
  } else {
   if (w > 0) {
    if (y != 0) {
     sb.append(NUMBER2[0]);
    }
    sb.append(getNumberStr1000(w));
    sb.append(NUMBER2[4]);
   }
  }
  //万以下
  if (g > 0) {
   if (w != 0) {
    if (g > 999) {
     sb.append(getNumberStr1000(g));
    } else {
     sb.append(NUMBER2[0]);
     sb.append(getNumberStr1000(g));
    } 

   } else {
    if (y != 0) {
     sb.append(NUMBER2[0]);
    }
    sb.append(getNumberStr1000(g));
   }
  }
  return sb.toString();
 } 

 /**
  * @param num
  * @return
  * @Description:对万以下的数字进行大小写转化
  */
 private static String getNumberStr1000 (int num) {
  if (num > 9999 || num < 0) {
   return "";
  }
  int q = num / 1000;
  int b = (num / 100) % 10;
  int s = (num / 10) % 10;
  int g = num % 10;
  StringBuffer sb = new StringBuffer();
  //千
  if (q > 0) {
   sb.append(NUMBER1[q]);
   sb.append(NUMBER2[3]);
  }
  //百
  if (b > 0) {
   sb.append(NUMBER1[b]);
   sb.append(NUMBER2[2]);
  } else {
   if (q != 0) {
    sb.append(NUMBER2[0]);
   }
  }
  //十
  if (s > 0) {
   sb.append(NUMBER1[s]);
   sb.append(NUMBER2[1]);
  } else {
   if (b != 0) {
    sb.append(NUMBER2[0]);
   }
  }
  //个
  if (g > 0) {
   sb.append(NUMBER1[g]);
  }
  return sb.toString();
 } 

 public static void main(String[] args) {
  // TODO Auto-generated method stub
  int i = 1;
  System.out.println(i + "--" + NumberUtil.getNumberStr(i));
  i = 1001;
  System.out.println(i + "--" + NumberUtil.getNumberStr(i));
  i = 100101;
  System.out.println(i + "--" + NumberUtil.getNumberStr(i));
  i = 10100101;
  System.out.println(i + "--" + NumberUtil.getNumberStr(i));
  i = 1234567890;
  System.out.println(i + "--" + NumberUtil.getNumberStr(i));
 } 

}

测试运行结果：

希望本文所述对大家学习java程序设计有所帮助。