Java常用数字工具类 数字转汉字（1）

//num 表示数字，lower表示小写，upper表示大写 
private static final String[] num_lower = { "零", "一", "二", "三", "四", "五", "六", "七", "八", "九" }; 
private static final String[] num_upper = { "零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖" }; 
 
//unit 表示单位权值，lower表示小写，upper表示大写 
private static final String[] unit_lower = { "", "十", "百", "千" }; 
private static final String[] unit_upper = { "", "拾", "佰", "仟"}; 
private static final String[] unit_common = {"","万", "亿","兆","京","垓","秭","穰","沟","涧","正","载"}; 
 
//允许的格式 
private static final List<String> promissTypes = Arrays.asList("INTEGER","INT","LONG","DECIMAL","FLOAT","DOUBLE","STRING","BYTE","TYPE","SHORT"); 
 
/** 
 * 数字转化为小写的汉字 
 * 
 * @param num 将要转化的数字 
 * @return 
 */ 
public static String toChineseLower(Object num){ 
 return format(num, num_lower, unit_lower); 
} 
 
/** 
 * 数字转化为大写的汉字 
 * 
 * @param num 将要转化的数字 
 * @return 
 */ 
public static String toChineseUpper(Object num){ 
 return format(num, num_upper, unit_upper); 
} 
 
/** 
 * 格式化数字 
 * 
 * @param num 原数字 
 * @param numArray 数字大小写数组 
 * @param unit 单位权值 
 * @return 
 */ 
private static String format(Object num,String[] numArray,String[] unit){ 
 if(!promissTypes.contains(num.getClass().getSimpleName().toUpperCase())){ 
 throw new RuntimeException("不支持的格式类型"); 
 } 
 //获取整数部分 
 String intnum = getInt(String.valueOf(num)); 
 //获取小数部分 
 String decimal = getFraction(String.valueOf(num)); 
 //格式化整数部分 
 String result = formatIntPart(intnum,numArray,unit); 
 if(!"".equals(decimal)){//小数部分不为空 
 //格式化小数 
 result += "点"+formatFractionalPart(decimal, numArray); 
 } 
 return result; 
} 
 
/** 
 * 格式化整数部分 
 * 
 * @param num 整数部分 
 * @param numArray 数字大小写数组 
 * @return 
 */ 
private static String formatIntPart(String num,String[] numArray,String[] unit){ 
 
 //按4位分割成不同的组（不足四位的前面补0） 
 Integer[] intnums = split2IntArray(num); 
 
 boolean zero = false; 
 StringBuffer sb = new StringBuffer(); 
 for(int i=0;i<intnums.length;i++){ 
 //格式化当前4位 
 String r = formatInt(intnums[i], numArray,unit); 
 if("".equals(r)){// 
 if((i+1)==intnums.length){ 
 sb.append(numArray[0]);//结果中追加“零” 
 }else{ 
 zero=true; 
 } 
 }else{//当前4位格式化结果不为空（即不为0） 
 if(zero || (i>0 && intnums[i]<1000)){//如果前4位为0，当前4位不为0 
 sb.append(numArray[0]);//结果中追加“零” 
 } 
 sb.append(r); 
 sb.append(unit_common[intnums.length-1-i]);//在结果中添加权值 
 zero=false; 
 } 
 } 
 return sb.toString(); 
} 
 
/** 
 * 格式化小数部分 
 * 
 * @param decimal 小数部分 
 * @param numArray 数字大小写数组 
 * @return 
 */ 
private static String formatFractionalPart(String decimal,String[] numArray) { 
 char[] val = String.valueOf(decimal).toCharArray(); 
 int len = val.length; 
 StringBuilder sb = new StringBuilder(); 
 for (int i = 0; i < len; i++) { 
 int n = Integer.valueOf(val[i] + ""); 
 sb.append(numArray[n]); 
 } 
 return sb.toString(); 
} 
 

/** 
 * 获取整数部分 
 * 
 * @param num 
 * @return 
 */ 
private static String getInt(String num){ 
 //检查格式 
 checkNum(num); 
 
 char[] val = String.valueOf(num).toCharArray(); 
 StringBuffer sb = new StringBuffer(); 
 int t , s = 0; 
 for (int i = 0; i < val.length; i++) { 
 if(val[i]=='.') { 
 break; 
 } 
 t = Integer.parseInt(val[i]+"",16); 
 if(s+t==0){ 
 continue; 
 } 
 sb.append(t); 
 s+=t; 
 } 
 return (sb.length()==0? "0":sb.toString()); 
} 
 
/** 
 * 获取小数部分 
 * 
 * @param num 
 * @return 
 */ 
private static String getFraction(String num){ 
 int i = num.lastIndexOf("."); 
 if(num.indexOf(".") != i){ 
 throw new RuntimeException("数字格式不正确，最多只能有一位小数点！"); 
 } 
 String fraction =""; 
 if(i>=0){ 
 fraction = getInt(new StringBuffer(num).reverse().toString()); 
 if(fraction.equals("0")){ 
 return ""; 
 } 
 } 
 return new StringBuffer(fraction).reverse().toString(); 
} 
 
/** 
 * 检查数字格式 
 * 
 * @param num 
 */ 
private static void checkNum(String num) { 
 if(num.indexOf(".") != num.lastIndexOf(".")){ 
 throw new RuntimeException("数字["+num+"]格式不正确!"); 
 } 
 if(num.indexOf("-") != num.lastIndexOf("-") || num.lastIndexOf("-")>0){ 
 throw new RuntimeException("数字["+num+"]格式不正确！"); 
 } 
 if(num.indexOf("+") != num.lastIndexOf("+")){ 
 throw new RuntimeException("数字["+num+"]格式不正确！"); 
 } 
 if(num.indexOf("+") != num.lastIndexOf("+")){ 
 throw new RuntimeException("数字["+num+"]格式不正确！"); 
 } 
 if(num.replaceAll("[\\d|\\.|\\-|\\+]", "").length()>0){ 
 throw new RuntimeException("数字["+num+"]格式不正确！"); 
 } 
}

public static void main(String[] args) { 
 short s = 10; 
 byte b=10; 
 char c='A'; 
 Object[] nums = {s, b, c, 0, 1001, 100100001L, 21., 205.23F, 205.23D, "01000010", "1000000100105.0123", ".142", "20.00", "1..2", true}; 
 System.out.println("将任意数字转化为汉字(包括整数、小数以及各种类型的数字)"); 
 System.out.println("--------------------------------------------"); 
 for(Object num :nums){ 
 try{ 
 System.out.print("["+num.getClass().getSimpleName()+"]"+num); 
 for(int i=0;i<25-String.valueOf(num+num.getClass().getSimpleName()).length();i+=4){ 
 System.out.print("\t"); 
 } 
 //调用转化为小写和大写 
 System.out.print(" format:"+toChineseLower(num)); 
 System.out.println("【"+toChineseUpper(num)+"】"); 
 }catch(Exception e){ 
 System.out.println(" 错误信息："+e.getMessage()); 
 } 
 } 
}