java常用工具类封装

import org.apache.commons.lang.StringUtils;

import java.math.BigDecimal;

public class CommonUtil {

    public static String safeToString(Object value, String defaultValue) {
        if (value != null) {
            return StringUtils.trim(String.valueOf(value));
        }
        return defaultValue;
    }

    public static Integer safeToInteger (Object obj, Integer defaultValue) {
        if (obj != null) {
            return Integer.parseInt(String.valueOf(obj));
        }
        return defaultValue;
    }

    
    public static String getHideCardNo(String cardNo){
        if (StringUtils.isNotBlank(cardNo)) {
            StringBuffer cardBuffer = new StringBuffer();
            char[] card = cardNo.toCharArray();
            if (card.length > 8 && card.length <= 12) {
                card[card.length - 5] = '*';
                card[card.length - 6] = '*';
                card[card.length - 7] = '*';
                card[card.length - 8] = '*';
            }
            if (card.length > 12) {
                for (int i = 5; i <= 12; i++) {
                    card[card.length - i] = '*';
                }
            }
            int head = card.length%4 + 4;
            for (int i = 0; i < head; i++) {
                cardBuffer.append(card[i]);
            }
            cardBuffer.append("");
            for (int i = 0; (i + head)< card.length; i++) {
                cardBuffer.append(card[i + head]);
                if ((i+1)%4 == 0) {
                    cardBuffer.append("");
                }
            }
            return cardBuffer.toString().trim();
        }
        return cardNo;
    }

    
    public static String nameDesensitization(String name){
        if(name==null || name.isEmpty()){
            return "";
        }
        String myName = null;
        char[] chars = name.toCharArray();
        if(chars.length==1){
            myName=name;
        }
        if(chars.length==2){
            myName=name.replace(name.substring(0,1), "*");
        }
        if(chars.length>2){
            myName=name.replaceAll(name.substring(0, chars.length-1), "*");
        }
        return myName;
    }

    
    public static String getHidePhone (String phone) {
        if (StringUtils.isNotBlank(phone)) {
            phone = phone.replaceAll("(^\d{3})\d.*(\d{4})", "$1****$2");
        }
        return phone;
    }

    
    public static String desensitizedIdNumber(String idNumber){
        if (StringUtils.isNotBlank(idNumber)) {
            if (idNumber.length() == 15){
                idNumber = idNumber.replaceAll("(\w{3})\w*(\w{4})", "$1********$2");
            }
            if (idNumber.length() == 18){
                idNumber = idNumber.replaceAll("(\w{3})\w*(\w{4})", "$1***********$2");
            }
        }
        return idNumber;
    }

    
    public static BigDecimal yuan2Fen(BigDecimal price) {
        return new BigDecimal(price.multiply(new BigDecimal("100")).longValue());
    }

    public static void main(String[] args) {
        String idNumber = desensitizedIdNumber("421202199805060221");
        System.out.println(idNumber);
    }
}