java常用工具类封装(代码片段)

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;
    

    /**
     * 方法注释： 银行卡号脱敏
     * @return
     */
    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;
    

    /**
     * 名字脱敏
     * 规则，张三丰，脱敏为：**丰
     */
    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;
    

    /**
     * 对手机号进行脱敏
     * @param phone
     * @return
     */
    public static String getHidePhone (String phone) 
        if (StringUtils.isNotBlank(phone)) 
            phone = phone.replaceAll("(^\\\\d3)\\\\d.*(\\\\d4)", "$1****$2");
        
        return phone;
    

    /**
     * 对身份证号进行脱敏
     * @param idNumber
     * @return
     */
    public static String desensitizedIdNumber(String idNumber)
        if (StringUtils.isNotBlank(idNumber)) 
            if (idNumber.length() == 15)
                idNumber = idNumber.replaceAll("(\\\\w3)\\\\w*(\\\\w4)", "$1********$2");
            
            if (idNumber.length() == 18)
                idNumber = idNumber.replaceAll("(\\\\w3)\\\\w*(\\\\w4)", "$1***********$2");
            
        
        return idNumber;
    

    /**
     * 元转为无小数点的分
     *
     * @param price
     * @return
     */
    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);