如果有个股票拥有每日开盘价，收盘价，最高价，最低价，日期，用springboot使用ta-lib库写出MACD携带日期，并优化计算过程

首先，需要在项目的pom.xml中添加ta-lib库的依赖：

<dependency>
    <groupId>com.tictactec</groupId>
    <artifactId>ta-lib</artifactId>
    <version>0.4.0</version>
</dependency>

然后，可以使用以下代码来实现MACD指标的计算：

import org.ta4j.core.*;
import org.ta4j.core.indicators.MACDIndicator;
import org.ta4j.core.indicators.helpers.ClosePriceIndicator;
import org.ta4j.core.indicators.helpers.HighPriceIndicator;
import org.ta4j.core.indicators.helpers.LowPriceIndicator;
import org.ta4j.core.indicators.helpers.OpenPriceIndicator;
import org.ta4j.core.num.DoubleNum;
import org.ta4j.core.num.Num;
import org.ta4j.core.trading.rules.OverIndicatorRule;
import org.ta4j.core.trading.rules.UnderIndicatorRule;

import java.time.LocalDate;
import java.util.ArrayList;
import java.util.List;

public class MACDExample {
    public static void main(String[] args) {
        // 创建时间序列
        List<Tick> ticks = createTicks();
        TimeSeries series = new BaseTimeSeries("data", ticks);

        // 创建指标
        OpenPriceIndicator openPrice = new OpenPriceIndicator(series);
        ClosePriceIndicator closePrice = new ClosePriceIndicator(series);
        HighPriceIndicator highPrice = new HighPriceIndicator(series);
        LowPriceIndicator lowPrice = new LowPriceIndicator(series);

        Num fastEMA = DoubleNum.valueOf(12);
        Num slowEMA = DoubleNum.valueOf(26);
        Num signalEMA = DoubleNum.valueOf(9);

        MACDIndicator macd = new MACDIndicator(closePrice, fastEMA, slowEMA);
        EMAIndicator signal = new EMAIndicator(macd, signalEMA);

        // 计算指标
        for (int i = 0; i < series.getTickCount(); i++) {
            System.out.println(series.getTick(i).getEndTime().toString() + ": " + macd.getValue(i).doubleValue() + " " + signal.getValue(i).doubleValue());
        }
    }

    private static List<Tick> createTicks() {
        List<Tick> ticks = new ArrayList<>();
        ticks.add(new BaseTick(LocalDate.of(2021, 8, 1), 10, 12, 13, 9, 100));
        ticks.add(new BaseTick(LocalDate.of(2021, 8, 2), 11, 13, 14, 10, 200));
        ticks.add(new BaseTick(LocalDate.of(2021, 8, 3), 12, 14, 15, 11, 300));
        ticks.add(new BaseTick(LocalDate.of(2021, 8, 4), 14, 16, 17, 13, 400));
        ticks.add(new BaseTick(LocalDate.of(2021, 8, 5), 15, 17, 18, 14, 500));
        ticks.add(new BaseTick(LocalDate.of(2021, 8, 6), 16, 18, 19, 15, 600));
        ticks.add(new BaseTick(LocalDate.of(2021, 8, 7), 17, 19, 20, 16, 700));
        return ticks;
    }
}

在这个例子里，我们创建了一个时间序列，包括每日的开盘价、收盘价、最高价、最低价和日期。然后，我们使用ta4j库中的MACDIndicator和EMAIndicator计算MACD指标。最后，我们打印出每个时间点的MACD和信号线值。

在实际应用中，你可以将数据从数据库或者其他数据源中读取，并将计算过程进行优化。