JAVA BigDecimal数字转换成人民币及格式化

雨点打透心脏的1/2处 2024-05-08 07:32 88阅读 0赞

### **JAVA BigDecimal数字转换成人民币及格式化** ###

import java.math.BigDecimal;
    import java.math.RoundingMode;
    import java.text.NumberFormat;
    
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    
    
    /**
     * @Description: 数字转中文人民币工具类
     * @author: mingbiao
     */
    public class NumberToRmbUtil {
    	private static final Logger LOGGER = LoggerFactory.getLogger(NumberToRmbUtil.class);
    
    	private static final String[] RMB_ARR = { "零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖" };
    	private static final String[] UNIT_ARR = { "", "十", "佰", "仟" };
    	private static final String[] HIGH_UINIT_ARR = { "", "万", "亿" };
    	private static final String[] LOW_UNIT_ARR = { "角", "分" };
    	private static final String RMB_UNIT = "元";
    	private static final String RMB_INTEGER = "整";
    	private static final String ZERO_STR = "0";
    	private static final String DOUBLE_ZERO_STR = "00";
    	private static final char ZERO_CHR = '0';
    	private static final int SCALE = 0;
    
    	private NumberToRmbUtil() {
    		throw new IllegalStateException("Utility class");
        }
    
    	/**
    	 * BigDecimal类型数据取整数并转为字符串
    	 */
    	private static String greaterZeroToInt(BigDecimal amount) {
    		if (amount == null) {
    			return ZERO_STR;
    		}
    		return amount.divide(new BigDecimal(1), SCALE, RoundingMode.DOWN).toString();
    	}
    
    	/**
    	 * BigDecimal类型数据取整数
    	 */
    	private static BigDecimal greaterZeroNum(BigDecimal amount) {
    		return amount.divide(new BigDecimal(1), SCALE, RoundingMode.DOWN);
    	}
    
    	/**
    	 * BigDecimal类型数据取2位小数转为字符串整数，不足2位十位补0
    	 */
    	private static String lessZeroToInt(BigDecimal amount) {
    		String intStr = amount.movePointRight(2).divide(new BigDecimal(1), SCALE, RoundingMode.HALF_UP).toBigInteger()
    				.toString();
    		if (intStr.length() == 1) {
    			return ZERO_STR + intStr;
    		}
    		return intStr;
    	}
    
    	/**
    	 * 整数转人民币
    	 */
    	private static String itoRmbStr(String numStr) {
    		StringBuilder result = new StringBuilder();
    		if (ZERO_STR.equals(numStr)) {
    			return result.toString();
    		}
    		int len = numStr.length();
                    //CommonStatus.MAX_AMOUNT_LIMIT自定义即可
    		if (len > CommonStatus.MAX_AMOUNT_LIMIT) {
    			LOGGER.error("itoRmbStr={}, len={}", numStr, len);
                    //BusinessException自定义即可
    			throw new BusinessException(ResultCode.SYS_PARAM_ERROR.getCode(), "数字长度超过系统限制");
    		}
    		int col = (len - 1) / 4;
    		int row = (len - 1) % 4;
    		int index = 0;
    		LOGGER.info("col = {}, row = {}", col, row);
    		for (int i = 0; i <= col; i++) {
    			for (int j = 0; j <= row; j++) {
    				if (numStr.charAt(index) == ZERO_CHR) {
    					if ((numStr.charAt(index - 1) == ZERO_CHR && j != 0) || j == row) {
    						index++;
    						continue;
    					}
    					result.append(RMB_ARR[numStr.charAt(index) - ZERO_CHR]);
    				} else {
    					result.append(RMB_ARR[numStr.charAt(index) - ZERO_CHR]);
    					result.append(UNIT_ARR[row - j]);
    				}
    				index++;
    			}
    			result.append(HIGH_UINIT_ARR[col - i]);
    			row = 3;
    		}
    		result.append(RMB_UNIT);
    		return result.toString();
    	}
    
    	/**
    	 * 小数转人民币
    	 */
    	private static String ftoRmbStr(String numStr) {
    		String result = "";
    		if (numStr.equals(DOUBLE_ZERO_STR) || numStr.equals(ZERO_STR))
    			return RMB_INTEGER;
    		result += RMB_ARR[numStr.charAt(0) - ZERO_CHR];
    		if (numStr.charAt(0) != ZERO_CHR) {
    			result += LOW_UNIT_ARR[0];
    		}
    		result += RMB_ARR[numStr.charAt(1) - ZERO_CHR];
    		if (numStr.charAt(1) != ZERO_CHR) {
    			result += LOW_UNIT_ARR[1];
    		}
    		return result;
    	}
    
    	/** 
    	 * 数字转人民币
    	 */
    	public static String change(BigDecimal amount) {
    		validAmount(amount);
    		String greaterZeroToInt = greaterZeroToInt(amount);
    		String itoRmbStr = itoRmbStr(greaterZeroToInt);
    		BigDecimal lessZeroNum = amount.subtract(greaterZeroNum(amount));
    		String lessZeroToInt = lessZeroToInt(lessZeroNum);
    		String ftoRmbStr = ftoRmbStr(lessZeroToInt);
    		return itoRmbStr + ftoRmbStr;
    	}
    	
    	/** 
    	 * 格式化人名币数字为￥12,343,171.60类似格式(带小数位)
    	 */
    	public static String formatYuan(BigDecimal amount) {
    		return formatNumber(amount, 2, 4);
    	}
    	
    	/** 
    	 * 格式化人名币数字为￥12,343,171类似格式(不带小数位)
    	 */
    	public static String formatFen(BigDecimal amount) {
    		return formatNumber(amount, 0, 0);
    	}
    	
    	/** 
    	 * 格式化人名币数字为￥12343171类似格式(不带小数位且不带分隔符)
    	 */
    	public static String formatFenNoSymbol(BigDecimal amount) {
    		return formatFen(amount).replace(",", "");
    	}
    	
    	/**
    	 *  格式化人名币数字
    	* @function formatNumber
    	* @param amount 金额
    	* @param minDigits 设置数的小数部分所允许的最小位数(如果不足后面补0)
    	* @param maxDigits 设置数的小数部分所允许的最大位数(如果超过会四舍五入)
    	* @return String
    	* 
    	 */
    	private static String formatNumber(BigDecimal amount, int minDigits, int maxDigits) {
    		validAmount(amount);
    		NumberFormat currency = NumberFormat.getCurrencyInstance();
            currency.setMinimumFractionDigits(minDigits);
            currency.setMaximumFractionDigits(maxDigits);
            return currency.format(amount);
    	}
    	
    	private static void validAmount(BigDecimal amount) {
    		if (null == amount) {
    			throw new BusinessException(ResultCode.SYS_PARAM_ERROR.getCode(), "数字不可为null");
    		}
    	}
    
    }

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