干货！JAVA计算股票MACD，代码分享

　　和软件的MACD的值进行对比过，数值是一样的，不过我这个版本小数点后面更精确，软件的是四舍五入的。这个版本支持增量更新，更加方便。
　　使用需要单例模式，如果多并发请自行修改代码。默认是12，26，9
　　特别注意，网站上的和软件的MACD有时候并不一致，本文的计算结果以软件为准！！！
　　废话不多说，直接开干！import java.math.BigDecimal; import java.math.RoundingMode; import java.util.HashMap; import java.util.Map;  import org.springframework.stereotype.Component;  @Component(＂macdUtils＂) public class MacdUtils {  	static int fastSet = 12; 	static int slowSet = 26; 	static int deaSet = 9;  	static int emaFastFast = fastSet - 1; 	static int emaFastSlow = 2; 	static int emaFastBase = fastSet + 1; 	static int emaSlowFast = slowSet - 1; 	static int emaSlowSlow = 2; 	static int emaSlowBase = slowSet + 1; 	static int deaFast = deaSet - 1; 	static int deaSlow = 2; 	static int deaBase = deaSet + 1;  	public void init(int fastSetNum, int slowSetNum, int deaSetNum) { 		fastSet = fastSetNum; 		slowSet = slowSetNum; 		deaSet = deaSetNum; 		emaFastFast = fastSet - 1; 		emaFastSlow = 2; 		emaFastBase = fastSet + 1; 		emaSlowFast = slowSet - 1; 		emaSlowSlow = 2; 		emaSlowBase = slowSet + 1; 		deaFast = deaSet - 1; 		deaSlow = 2; 		deaBase = deaSet + 1; 	}  	public Map firstMACD(BigDecimal yestodayClose, BigDecimal nowClose) { 		Map macdInfoMap = new HashMap<>(); 		BigDecimal EMA12Fast = yestodayClose.multiply(BigDecimal.valueOf(emaFastFast)).pide(BigDecimal.valueOf(emaFastBase), 6, RoundingMode.DOWN); 		BigDecimal EMA12Slow = nowClose.multiply(BigDecimal.valueOf(emaFastSlow)).pide(BigDecimal.valueOf(emaFastBase), 6, RoundingMode.DOWN); 		BigDecimal EMA12 = EMA12Fast.add(EMA12Slow); 		BigDecimal EMA26Fast = yestodayClose.multiply(BigDecimal.valueOf(emaSlowFast)).pide(BigDecimal.valueOf(emaSlowBase), 6, RoundingMode.DOWN); 		BigDecimal EMA26Slow = nowClose.multiply(BigDecimal.valueOf(emaSlowSlow)).pide(BigDecimal.valueOf(emaSlowBase), 6, RoundingMode.DOWN); 		BigDecimal EMA26 = EMA26Fast.add(EMA26Slow); 		BigDecimal DIF = EMA12.subtract(EMA26); 		BigDecimal DEA = BigDecimal.ZERO.multiply(BigDecimal.valueOf(deaFast)).pide(BigDecimal.valueOf(deaBase), 6, RoundingMode.DOWN) 				.add(DIF.multiply(BigDecimal.valueOf(2)).pide(BigDecimal.valueOf(deaBase), 6, RoundingMode.DOWN)); 		BigDecimal MACD = DIF.subtract(DEA); 		macdInfoMap.put(＂EMA12＂, EMA12); 		macdInfoMap.put(＂EMA26＂, EMA26); 		macdInfoMap.put(＂DIF＂, DIF); 		macdInfoMap.put(＂DEA＂, DEA); 		macdInfoMap.put(＂MACD＂, MACD); 		return macdInfoMap; 	}  	public Map makeMACD(BigDecimal yesterdayEMA12, BigDecimal yesterdayEMA26, BigDecimal yesterdayDEA, BigDecimal nowClose) { 		Map macdInfoMap = new HashMap<>(); 		BigDecimal EMA12Fast = yesterdayEMA12.multiply(BigDecimal.valueOf(emaFastFast)).pide(BigDecimal.valueOf(emaFastBase), 6, RoundingMode.DOWN); 		BigDecimal EMA12Slow = nowClose.multiply(BigDecimal.valueOf(emaFastSlow)).pide(BigDecimal.valueOf(emaFastBase), 6, RoundingMode.DOWN); 		BigDecimal EMA12 = EMA12Fast.add(EMA12Slow); 		BigDecimal EMA26Fast = yesterdayEMA26.multiply(BigDecimal.valueOf(emaSlowFast)).pide(BigDecimal.valueOf(emaSlowBase), 6, RoundingMode.DOWN); 		BigDecimal EMA26Slow = nowClose.multiply(BigDecimal.valueOf(emaSlowSlow)).pide(BigDecimal.valueOf(emaSlowBase), 6, RoundingMode.DOWN); 		BigDecimal EMA26 = EMA26Fast.add(EMA26Slow); 		BigDecimal DIF = EMA12.subtract(EMA26); 		BigDecimal DEA = yesterdayDEA.multiply(BigDecimal.valueOf(deaFast)).pide(BigDecimal.valueOf(deaBase), 6, RoundingMode.DOWN) 				.add(DIF.multiply(BigDecimal.valueOf(2)).pide(BigDecimal.valueOf(deaBase), 6, RoundingMode.DOWN)); 		BigDecimal MACD = DIF.subtract(DEA); 		macdInfoMap.put(＂EMA12＂, EMA12); 		macdInfoMap.put(＂EMA26＂, EMA26); 		macdInfoMap.put(＂DIF＂, DIF); 		macdInfoMap.put(＂DEA＂, DEA); 		macdInfoMap.put(＂MACD＂, MACD); 		return macdInfoMap; 	}  }