java金额数字转中文工具类详解

package light.mvc.utils; import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader; /** * 金额数字转中文工具类 *  * @author ardo *  */public class ConvertNum {  /** * 把金额阿拉伯数字转换为汉字表示，小数点后四舍五入保留两位 * 还有一种方法可以在转换的过程中不考虑连续0的情况，然后对最终的结果进行一次遍历合并连续的零 */ public static String[] ChineseNum = new String[] { "零", "壹", "贰", "叁", "肆",  "伍", "陆", "柒", "捌", "玖" };  public static String NumToChinese(double num) { if (num > 99999999999999.99 || num < -99999999999999.99)  throw new IllegalArgumentException(   "参数值超出允许范围 (-99999999999999.99 ～ 99999999999999.99)！"); boolean negative = false;// 正负标号 if (num < 0) {  negative = true;  num = num * (-1); } long temp = Math.round(num * 100); int numFen = (int) (temp % 10);// 分 temp = temp / 10; int numJiao = (int) (temp % 10);// 角 temp = temp / 10; // 此时temp只包含整数部分 int[] parts = new int[20];// 将金额整数部分分为在0-9999之间数的各个部分 int numParts = 0;// 记录把原来金额整数部分分割为几个部分 for (int i = 0;; i++) {  if (temp == 0)  break;  int part = (int) (temp % 10000);  parts[i] = part;  temp = temp / 10000;  numParts++; } boolean beforeWanIsZero = true;// 标志位，记录万的下一级是否为0 String chineseStr = ""; for (int i = 0; i < numParts; i++) {  String partChinese = partConvert(parts[i]);  if (i % 2 == 0) {  if ("".equals(partChinese))   beforeWanIsZero = true;  else   beforeWanIsZero = false;  }  if (i != 0) {  if (i % 2 == 0)// 亿的部分   chineseStr = "亿" + chineseStr;  else {   if ("".equals(partChinese) && !beforeWanIsZero)// 如果“万”对应的         // part 为         // 0，而“万”下面一级不为         // 0，则不加“万”，而加“零”   chineseStr = "零" + chineseStr;   else {   if (parts[i - 1] < 1000 && parts[i - 1] > 0)// 如果万的部分不为0，而万前面的部分小于1000大于0，则万后面应该跟零    chineseStr = "零" + chineseStr;   chineseStr = "万" + chineseStr;   }  }  }  chineseStr = partChinese + chineseStr; } if ("".equals(chineseStr))// 整数部分为0，则表示为零元  chineseStr = ChineseNum[0]; else if (negative)// 整数部分部位0，但是为负数  chineseStr = "负" + chineseStr; chineseStr = chineseStr + "元"; if (numFen == 0 && numJiao == 0) {  chineseStr = chineseStr + "整"; } else if (numFen == 0) {// 0分  chineseStr = chineseStr + ChineseNum[numJiao] + "角"; } else {  if (numJiao == 0)  chineseStr = chineseStr + "零" + ChineseNum[numFen] + "分";  else  chineseStr = chineseStr + ChineseNum[numJiao] + "角"   + ChineseNum[numFen] + "分"; } return chineseStr; }  // 转换拆分后的每个部分，0-9999之间 public static String partConvert(int partNum) { if (partNum < 0 || partNum > 10000) {  throw new IllegalArgumentException("参数必须是大于等于0或小于10000的整数"); } String[] units = new String[] { "", "拾", "佰", "仟" }; int temp = partNum; String partResult = new Integer(partNum).toString(); int partResultLength = partResult.length(); boolean lastIsZero = true;// 记录上一位是否为0 String chineseStr = ""; for (int i = 0; i < partResultLength; i++) {  if (temp == 0)// 高位无数字  break;  int digit = temp % 10;  if (digit == 0) {  if (!lastIsZero)// 如果前一个数字不是0则在当前汉字串前加零   chineseStr = "零" + chineseStr;  lastIsZero = true;  } else {  chineseStr = ChineseNum[digit] + units[i] + chineseStr;  lastIsZero = false;  }  temp = temp / 10; } return chineseStr; }  public static void main(String args[]) { double num = 0; System.out.println("请输入金额数字,-1退出"); try {  BufferedReader br = new BufferedReader(new InputStreamReader(   System.in));  num = Double.parseDouble(br.readLine()); } catch (IOException e) {  System.out.println(e.toString()); } while (num != -1) {  System.out.println(num + NumToChinese(num));  try {  BufferedReader br = new BufferedReader(new InputStreamReader(   System.in));  num = Double.parseDouble(br.readLine());  } catch (IOException e) {  System.out.println(e.toString());  } } System.out.println("其他测试："); System.out.println("100120: " + NumToChinese(100120)); System.out.println("25000000000005.999: "  + NumToChinese(25000000000005.999)); System.out.println("45689263.626: " + NumToChinese(45689263.626)); System.out.println("0.69457: " + NumToChinese(0.69457)); System.out.println("253.0: " + NumToChinese(253.0)); System.out.println("0: " + NumToChinese(0)); }}