HexUtil.toHex添加对float和double的支持，并提供反向方法（pr#4193@Github）

hutool-core/src/main/java/cn/hutool/v7/core/codec/binary/HexUtil.java

@@ -199,6 +199,46 @@ public class HexUtil extends Hex {
 		return Long.parseLong(removeHexPrefix(value), 16);
 	}
 
+	/**
+	 * 转为16进制字符串
+	 *
+	 * @param value float值
+	 * @return 16进制字符串
+	 */
+	public static String toHex(float value) {
+		return Integer.toHexString(Float.floatToIntBits(value));
+	}
+
+	/**
+	 * 16进制字符串转为float
+	 *
+	 * @param value 16进制字符串
+	 * @return 16进制字符串float值
+	 */
+	public static float hexToFloat(String value) {
+		return Float.intBitsToFloat(Integer.parseUnsignedInt(removeHexPrefix(value), 16));
+	}
+
+	/**
+	 * 转为16进制字符串
+	 *
+	 * @param value double值
+	 * @return 16进制字符串
+	 */
+	public static String toHex(double value) {
+		return Long.toHexString(Double.doubleToLongBits(value));
+	}
+
+	/**
+	 * 16进制字符串转为double
+	 *
+	 * @param value 16进制字符串
+	 * @return 16进制字符串double值
+	 */
+	public static double hexToDouble(String value) {
+		return Double.longBitsToDouble(Long.parseUnsignedLong(removeHexPrefix(value), 16));
+	}
+
 	/**
 	 * 将byte值转为16进制并添加到{@link StringBuilder}中
 	 *

hutool-core/src/test/java/cn/hutool/v7/core/util/HexUtilTest.java

@@ -165,4 +165,53 @@ public class HexUtilTest {
 		final String result = HexUtil.format("123", "0x");
 		assertEquals("0x12 0x3", result);
 	}
+
+	@Test
+	public void hexToFloatTest() {
+		//测试正常浮点数值
+		float value1 = 1.5f;
+		String hex1 = HexUtil.toHex(value1);
+		assertEquals(value1, HexUtil.hexToFloat(hex1));
+
+		//测试负数
+		float value2 = -1.5f;
+		String hex2 = HexUtil.toHex(value2);
+		assertEquals(value2, HexUtil.hexToFloat(hex2));
+
+		//测试科学计数法值
+		float value3 = 1.23456789e-5f;
+		String hex3 = HexUtil.toHex(value3);
+		assertEquals(value3, HexUtil.hexToFloat(hex3));
+
+		//测试十六进制前缀
+		assertEquals(1.5f, HexUtil.hexToFloat("0x3fc00000"));
+		assertEquals(1.5f, HexUtil.hexToFloat("#3fc00000"));
+	}
+
+	@Test
+	public void hexToDoubleTest() {
+		//测试正常双精度浮点数值
+		double value1 = 1.5;
+		String hex1 = HexUtil.toHex(value1);
+		assertEquals(value1, HexUtil.hexToDouble(hex1));
+
+		//测试负数
+		double value3 = -1.5;
+		String hex3 = HexUtil.toHex(value3);
+		assertEquals(value3, HexUtil.hexToDouble(hex3));
+
+		//测试高精度数值
+		double value4 = Math.PI;
+		String hex4 = HexUtil.toHex(value4);
+		assertEquals(value4, HexUtil.hexToDouble(hex4));
+
+		//测试科学计数法值
+		double value5 = 1.23456789012345e-10;
+		String hex5 = HexUtil.toHex(value5);
+		assertEquals(value5, HexUtil.hexToDouble(hex5));
+
+		//测试十六进制前缀
+		assertEquals(1.5, HexUtil.hexToDouble("0x3ff8000000000000"));
+		assertEquals(1.5, HexUtil.hexToDouble("#3ff8000000000000"));
+	}
 }