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整型数转换为指定位数的字符串，位数不足前面补零

2013-10-24 18:05:36| 分类： JAVA | 标签： |举报 |字号大中小订阅

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位数不足前面补零：

String.format("%06d",19);

转换后类型是String，保留6位，不足前面补0；d表示后面参数是整型

[java]view plaincopy
        // 当前年月日,20090818格式     
        String currentFormatDate = Util.getCurrentFormatDate();     
    
        // 找到最大的编号     
        List list = baseDAO.findByNamedQuery("findMaxSNFromDistribute");     
    
        if (list != null && !list.isEmpty()) {     
            String maxNumber = (String) list.get(0); // 最大的编号     
            String date = maxNumber.substring(6, maxNumber.length() - 3); // 年月日串     
            String number = maxNumber.substring(14, maxNumber.length()); // 后三位数字     
            // 后三位数字+1 , 长度为3,不足自动补0     
            number = String.format("%03d", Integer.valueOf(number) + 1);     
            if (date.equals(currentFormatDate)) {     
                return "CBDis-" + currentFormatDate + number;     
            } else {     
                return "CBDis-" + currentFormatDate + "001";     
            }     
    
        }     
    
    
    
// Util.java工具类     
    
public class Util {     
    
    public static String getCurrentFormatDate(){     
        Date date = new Date(System.currentTimeMillis());     
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");     
        String currentDate =  dateFormat.format(date);     
        StringBuffer buf = new StringBuffer("");     
        buf.append(currentDate.substring(0, 4)).append(     
                currentDate.substring(5, 7)).append(     
                currentDate.substring(8, 10));     
        return buf.toString();     
}     
}  

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