sql无限添加查询条件

String condition = " and ";
		if (null != feeds.getDatetime()
				&& feeds.getDatetime().trim().length() > 1) {
			String[] date = feeds.getDatetime().split(",");
			SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
			try {
				if (date.length > 1) {
					if (date[0].trim().length() == 0) {
						condition += "weight = " + sdf.parse(date[1]).getTime()
								/ 1000;
					} else if (date[1].trim().length() == 0) {
						condition += "weight = " + sdf.parse(date[0]).getTime()
								/ 1000;
					} else {
						condition += "weight in ("
								+ sdf.parse(date[0]).getTime() / 1000 + ","
								+ sdf.parse(date[1]).getTime() / 1000 + ")";
					}
				}
			} catch (ParseException e) {
				e.printStackTrace();
			}
		}

		if ("and".equals(condition.trim())) {
			condition = "";
		}
		System.out.println(condition);

<input
							type="text"
							name="feeds.datetime"
							class="input"
							readonly="readonly"
							onClick="WdatePicker();"
						/>
						<span class="search_title">结束时间：</span>
						<input
							type="text"
							name="feeds.datetime"
							class="input"
							readonly="readonly"
							onClick="WdatePicker();"
						/>