/** * 将字节数组转换成字符串 * @param array 字节数组 * @return String */
public static String byte2str(byte[] array){
StringBuffer hexstr = new StringBuffer(); String shaHex = ""; for(int i=0;i<array.length;i++){ shaHex = Integer.toHexString(array[i] & 0xFF); if(shaHex.length()<2){ hexstr.append(0); } hexstr.append(shaHex); } return hexstr.toString(); }
/**
* 判断字符串非空* @param str 字符串* @return boolean*/
private static boolean hasLength(String str){
return str!=null && !"".equals(str.trim())；
}
/**
* 判断字符串为空* @param str 字符串* @return boolean*/
private static boolean hasLengths(String str){
return !hasLength(str);
}
/** * 得到本周周一的日期 * @return yyyy-MM-dd */ public static String getMondayOfThisWeek(){ DateFormat df = new SimpleDateFormat("yyyy-MM-dd"); Calendar c = Calendar.getInstance(); //得到今天星期几 int dayOfWeek = c.get(Calendar.DAY_OF_WEEK)-1; //对星期天特殊对待 if(dayOfWeek == 0) dayOfWeek = 7; //假如今天是星期四,往前推3天就是星期一,即(4-1) c.add(Calendar.DATE, -(dayOfWeek - 1)); return df.format(c.getTime()); }
转载于:https://www.cnblogs.com/wenxudong/p/6232473.html
