finereport日期框名为startTime要根据名为dataCycle下拉框的内容而改变日期格式，如当dataCycle为everyQuarter时startTime日期框格式改成yyyy-MM-dd HH:mm:00

以下是基于Finereport API的代码示例，用于实现该需求：

import com.fr.base.Parameter;
import com.fr.base.ParameterHelper;
import com.fr.general.ComparatorUtils;
import com.fr.general.GeneralUtils;
import com.fr.report.core.ReportUtils;
import com.fr.stable.StringUtils;
import com.fr.stable.UtilEvalError;
import com.fr.stable.xml.XMLPrintWriter;
import com.fr.stable.xml.XMLableReader;
import com.fr.web.core.Reportlet;
import com.fr.web.request.ReportletRequest;

import java.util.Calendar;
import java.util.Date;

public class CustomReportlet extends Reportlet {

    private static final String DATA_CYCLE_PARAM_NAME = "dataCycle";
    private static final String START_TIME_PARAM_NAME = "startTime";

    @Override
    public void readXML(XMLableReader reader) {
        super.readXML(reader);
    }

    @Override
    public void writeXML(XMLPrintWriter writer) {
        super.writeXML(writer);
    }

    @Override
    public void init(ReportletRequest request) {
        super.init(request);

        ParameterHelper parameterHelper = this.getParamHelper();

        // 获取 dataCycle 参数的值
        String dataCycle = "";
        Parameter dataCycleParam = parameterHelper.getParameter(DATA_CYCLE_PARAM_NAME);
        if (dataCycleParam != null) {
            dataCycle = dataCycleParam.getValue().toString();
        }

        // 根据 dataCycle 参数的值修改 startTime 参数的日期格式
        if (StringUtils.isNotEmpty(dataCycle)) {
            Parameter startTimeParam = parameterHelper.getParameter(START_TIME_PARAM_NAME);
            if (startTimeParam != null && "everyQuarter".equals(dataCycle)) {
                startTimeParam.setDateValue(getQuarterStart(new Date()));
                startTimeParam.setFormat("yyyy-MM-dd HH:mm:00");
            }
        }
    }

    /**
     * 获取当前季度的开始日期
     */
    private Date getQuarterStart(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        int currentMonth = calendar.get(Calendar.MONTH) + 1;
        int quarterStartMonth = 0;
        if (currentMonth >= 1 && currentMonth <= 3) {
            quarterStartMonth = 1;
        } else if (currentMonth >= 4 && currentMonth <= 6) {
            quarterStartMonth = 4;
        } else if (currentMonth >= 7 && currentMonth <= 9) {
            quarterStartMonth = 7;
        } else if (currentMonth >= 10 && currentMonth <= 12) {
            quarterStartMonth = 10;
        }
        calendar.set(Calendar.MONTH, quarterStartMonth - 1);
        calendar.set(Calendar.DAY_OF_MONTH, 1);
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MILLISECOND, 0);
        return calendar.getTime();
    }

}

以上代码实现了一个自定义的 Finereport 报表模板，根据名为 dataCycle 下拉框的值修改名为 startTime 的日期框的日期格式。其中 `getQuarterStart` 方法用于获取当前季度的开始日期。需要注意的是，上述代码仅为示例，具体实现方式可能会因为业务需求不同而有所差异。