Excel07SaxReader中，对于小数类型，增加精度判断（issue#IB0EJ9@Gitee）

hutool-json/src/test/java/cn/hutool/json/Issue3790Test.java

@@ -0,0 +1,25 @@
+package cn.hutool.json;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+public class Issue3790Test {
+	@Test
+	void bigDecimalToStringTest() {
+		BigDecimal bigDecimal = new BigDecimal("0.01");
+		bigDecimal = bigDecimal.setScale(4, RoundingMode.HALF_UP);
+
+		Dto dto = new Dto();
+		dto.remain = bigDecimal;
+
+		final String jsonStr = JSONUtil.toJsonStr(dto, JSONConfig.create().setStripTrailingZeros(false));
+		Assertions.assertEquals("{\"remain\":0.0100}", jsonStr);
+	}
+
+	static class Dto {
+		public BigDecimal remain;
+	}
+}