public class DaoUtil{	/**	 * 将null转换为空字符串	 * @param value	 * @return	 */	public static String nullToString(Object value){		return value==null?"":value.toString().trim();	}	/**	 * 将null或空字符串转换为html的空格字符  (可适用于列表显示表格线)	 * @param value	 * @return	 */	public static String nullToNBSP(Object value){		return (value==null || "".equals(value.toString().trim()))?" ":value.toString().trim();	}		/**	 * 将null转换为字符串_nbsp	 * @param e	 * @return	 */	public static String toNBSP(Object e) {		String s = "_nbsp";		if (e != null && !"".equals(e.toString().trim())) {			s = e.toString().trim();		}		return s;	}		/**	 * 将null或空字符串转换为String类型0	 * @param value	 * @return	 */	public static String nullToNumber(Object value){		return (value==null || "".equals(value.toString().trim()))?"0":value.toString().trim();	}		/**	 * 将null或空字符串转换为int类型0	 * @param value	 * @return	 */	public static int nullToNumber2(Object value){		return (value==null || "".equals(value.toString().trim()))?0:Integer.parseInt(value.toString().trim());	}	/**	 * 将null或空字符串转换为double类型0	 * @param value	 * @return	 */	public static double nullToNumber3(Object value){		return (value==null || "".equals(value.toString().trim()))?0:Double.parseDouble(value.toString().trim());	}}