修复Money类的setAmount方法没有获取当前币种的小数位数而是使用的默认小数位和在遇到非2小数位的币种(如日元使用 0 位)会导致金额设置错误问题（pr#3970@Github）

hutool-core/src/main/java/cn/hutool/v7/core/math/Money.java

@@ -312,7 +312,7 @@ public class Money implements Serializable, Comparable<Money> {
 	 */
 	public void setAmount(final BigDecimal amount) {
 		if (amount != null) {
-			cent = rounding(amount.movePointRight(2), DEFAULT_ROUNDING_MODE);
+			cent = rounding(amount.movePointRight(currency.getDefaultFractionDigits()), DEFAULT_ROUNDING_MODE);
 		}
 	}
 

hutool-core/src/test/java/cn/hutool/v7/core/math/MoneyTest.java

@@ -16,24 +16,35 @@
 
 package cn.hutool.v7.core.math;
 
-import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
+import java.math.BigDecimal;
+import java.util.Currency;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
 public class MoneyTest {
 
 	@Test
 	public void yuanToCentTest() {
 		final Money money = new Money("1234.56");
-		Assertions.assertEquals(123456, money.getCent());
+		assertEquals(123456, money.getCent());
 
-		Assertions.assertEquals(123456, MathUtil.yuanToCent(1234.56));
+		assertEquals(123456, MathUtil.yuanToCent(1234.56));
 	}
 
 	@Test
 	public void centToYuanTest() {
 		final Money money = new Money(1234, 56);
-		Assertions.assertEquals(1234.56D, money.getAmount().doubleValue(), 0);
+		assertEquals(1234.56D, money.getAmount().doubleValue(), 0);
 
-		Assertions.assertEquals(1234.56D, MathUtil.centToYuan(123456), 0);
+		assertEquals(1234.56D, MathUtil.centToYuan(123456), 0);
+	}
+
+	@Test
+	public void currencyScalingTest() {
+		Money jpyMoney = new Money(0, Currency.getInstance("JPY"));
+		jpyMoney.setAmount(BigDecimal.ONE);
+		assertEquals(1, jpyMoney.getCent());
 	}
 }

hutool-core/src/test/java/cn/hutool/v7/core/reflect/FieldUtilTest.java

@@ -16,11 +16,22 @@
 
 package cn.hutool.v7.core.reflect;
 
+import cn.hutool.v7.core.collection.CollUtil;
 import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.experimental.FieldNameConstants;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
 import java.lang.reflect.Field;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.stream.Collectors;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 public class FieldUtilTest {
 	@Test
@@ -33,15 +44,22 @@ public class FieldUtilTest {
 	@Test
 	public void getFieldsTest() {
 		// 能够获取到父类字段
-		final Field[] fields = FieldUtil.getFields(ReflectTestBeans.TestSubClass.class);
-		Assertions.assertEquals(4, fields.length);
+		Field[] fields = FieldUtil.getFields(ReflectTestBeans.TestSubClass.class);
+		assertEquals(4, fields.length);
+
+		// 如果子类与父类中存在同名字段，则这两个字段同时存在，子类字段在前，父类字段在后。
+		fields = FieldUtil.getFields(TestSubUser.class);
+		assertEquals(4, fields.length);
+		List<Field> idFieldList = Arrays.stream(fields).filter(f -> Objects.equals(f.getName(), TestSubUser.Fields.id)).collect(Collectors.toList());
+		Field firstIdField = CollUtil.getFirst(idFieldList);
+		assertEquals(Objects.requireNonNull(firstIdField).getDeclaringClass().getName(), TestSubUser.class.getName());
 	}
 
 	@Test
 	public void setFieldTest() {
 		final ReflectTestBeans.AClass testClass = new ReflectTestBeans.AClass();
 		FieldUtil.setFieldValue(testClass, "a", "111");
-		Assertions.assertEquals(111, testClass.getA());
+		assertEquals(111, testClass.getA());
 	}
 
 	@Test
@@ -64,9 +82,9 @@ public class FieldUtilTest {
 		testBean.setB(1);
 
 		final Object[] fieldsValue = FieldUtil.getFieldsValue(testBean);
-		Assertions.assertEquals(2, fieldsValue.length);
-		Assertions.assertEquals("A", fieldsValue[0]);
-		Assertions.assertEquals(1, fieldsValue[1]);
+		assertEquals(2, fieldsValue.length);
+		assertEquals("A", fieldsValue[0]);
+		assertEquals(1, fieldsValue[1]);
 	}
 
 	@Test
@@ -76,8 +94,16 @@ public class FieldUtilTest {
 		testBean.setB(1);
 
 		final Object[] fieldsValue = FieldUtil.getFieldsValue(testBean, (field ->  field.getName().equals("a")));
-		Assertions.assertEquals(1, fieldsValue.length);
-		Assertions.assertEquals("A", fieldsValue[0]);
+		assertEquals(1, fieldsValue.length);
+		assertEquals("A", fieldsValue[0]);
+	}
+
+	@Test
+	public void getFieldMapTest() {
+		// 获取指定类中字段名和字段对应的有序Map，包括其父类中的字段
+		// 如果子类与父类中存在同名字段，则后者覆盖前者。
+		Map<String, Field> fieldMap = FieldUtil.getFieldMap(TestSubUser.class);
+		assertEquals(3, fieldMap.size());
 	}
 
 	@Data
@@ -85,4 +111,18 @@ public class FieldUtilTest {
 		private String a;
 		private int b;
 	}
+
+	@Data
+	static class TestBaseEntity {
+		private Long id;
+		private String remark;
+	}
+
+	@Data
+	@FieldNameConstants
+	@EqualsAndHashCode(callSuper = true)
+	static class TestSubUser extends TestBaseEntity {
+		private Long id;
+		private String name;
+	}
 }