java实现整数转化为中文大写金额的方法

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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：