Merge pull request #4211 from Shinomiya-s/fix-numberutil-parse-scientific

fix: correct NumberUtil.parseNumber scientific notation parsing

hutool-core/src/main/java/cn/hutool/core/util/NumberUtil.java

@@ -2783,6 +2783,16 @@ public class NumberUtil {
 		// issue@4197@Github 转为半角
 		numberStr = Convert.toDBC(numberStr);
 
+		// issue#IDJ1NS@Gitee 处理科学计数法E+格式
+		// NumberFormat对E+格式支持不佳,使用BigDecimal直接解析
+		if (numberStr.contains("E") || numberStr.contains("e")) {
+			try {
+				return new BigDecimal(numberStr);
+			} catch (NumberFormatException e) {
+				// BigDecimal解析失败,继续使用NumberFormat尝试
+			}
+		}
+
 		try {
 			final NumberFormat format = NumberFormat.getInstance();
 			if (format instanceof DecimalFormat) {

hutool-core/src/test/java/cn/hutool/core/util/NumberUtilTest.java

@@ -388,6 +388,17 @@ public class NumberUtilTest {
 
 	}
 
+	@Test
+	public void parseNumberTest5() {
+		String numberstr1 = "8.37095942E+9";
+		Number result1 = NumberUtil.parseNumber(numberstr1);
+		// 转换成BigDecimal再输出完整数字
+		System.out.println(((BigDecimal) result1).toPlainString());
+		String numberstr2 = "8.37095942e+9";
+		Number result2 = NumberUtil.parseNumber(numberstr2);
+		System.out.println(((BigDecimal) result2).toPlainString());
+	}
+
 	@Test
 	public void parseHexNumberTest() {
 		// 千位分隔符去掉