修复NumberWordFormatter.format小数问题

hutool-core/src/test/java/cn/hutool/core/convert/NumberWordFormatterTest.java

@@ -0,0 +1,55 @@
+package cn.hutool.core.convert;
+
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class NumberWordFormatterTest {
+
+	@Test
+	public void testFormatNull() {
+		// 测试传入null值的情况
+		String result = NumberWordFormatter.format(null);
+		Assert.assertEquals("", result);
+	}
+
+	@Test
+	public void testFormatInteger() {
+		// 测试传入整数的情况
+		String result = NumberWordFormatter.format(1234);
+		Assert.assertEquals("ONE THOUSAND TWO HUNDRED AND THIRTY FOUR ONLY", result);
+
+		result = NumberWordFormatter.format(1204);
+		Assert.assertEquals("ONE THOUSAND TWO HUNDRED AND FOUR ONLY", result);
+
+		result = NumberWordFormatter.format(1004);
+		Assert.assertEquals("ONE THOUSAND FOUR ONLY", result);
+	}
+
+	@Test
+	public void testFormatDecimal() {
+		// 测试传入小数的情况
+		String result = NumberWordFormatter.format(1234.56);
+		Assert.assertEquals("ONE THOUSAND TWO HUNDRED AND THIRTY FOUR AND CENTS FIFTY SIX ONLY", result);
+	}
+
+	@Test
+	public void testFormatLargeNumber() {
+		// 测试传入大数字的情况
+		String result = NumberWordFormatter.format(1234567890123L);
+		Assert.assertEquals("ONE TRILLION TWO HUNDRED AND THIRTY FOUR BILLION FIVE HUNDRED AND SIXTY SEVEN MILLION EIGHT HUNDRED AND NINETY THOUSAND ONE HUNDRED AND TWENTY THREE ONLY", result);
+	}
+
+	@Test(expected = NumberFormatException.class)
+	public void testFormatNonNumeric() {
+		// 测试传入非数字字符串的情况
+		NumberWordFormatter.format("non-numeric");
+	}
+
+	@Test
+	public void issue3579Test() {
+		Assert.assertEquals("ZERO AND CENTS TEN ONLY", NumberWordFormatter.format(0.1));
+		Assert.assertEquals("ZERO AND CENTS ONE ONLY", NumberWordFormatter.format(0.01));
+	}
+}
+