add test

hutool-core/src/test/java/cn/hutool/core/bean/IssueIBLTZWTest.java

@@ -0,0 +1,61 @@
+package cn.hutool.core.bean;
+
+import cn.hutool.core.bean.copier.CopyOptions;
+import cn.hutool.core.convert.TypeConverter;
+import cn.hutool.core.date.DateUtil;
+import cn.hutool.core.util.ReflectUtil;
+import lombok.Data;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.lang.reflect.Field;
+import java.util.Date;
+
+/**
+ * 自定义某个字段的转换
+ */
+public class IssueIBLTZWTest {
+	@Test
+	public void copyTest() {
+		TestBean bean = new TestBean();
+		bean.setName("test");
+		bean.setDate(DateUtil.parse("2025-02-17"));
+
+		final TestBean2 testBean2 = new TestBean2();
+		BeanUtil.copyProperties(bean, testBean2, createCopyOptions(TestBean2.class));
+		Assertions.assertEquals("2025", testBean2.getDate());
+	}
+
+	@Data
+	static class TestBean {
+		private String name;
+		private Date date;
+	}
+
+	@Data
+	static class TestBean2 {
+		private String name;
+		private String date;
+	}
+
+	static CopyOptions createCopyOptions(Class<?> targetClass) {
+		CopyOptions copyOptions = CopyOptions.create();
+		TypeConverter converter = (TypeConverter) ReflectUtil.getFieldValue(copyOptions, "converter");
+		copyOptions
+			.setIgnoreError(true) // 忽略类型错误，避免自动转换
+			.setConverter(null)
+			.setFieldValueEditor((fieldName, value) -> {
+				try {
+					Field targetField = targetClass.getDeclaredField(fieldName);
+					// Date类型的 value instanceof 结果是String
+					if (targetField.getType() == String.class && value instanceof Date) {
+						return DateUtil.format((Date)value, "yyyy");
+					}
+					return converter.convert(targetField.getType(), value);
+				} catch (NoSuchFieldException e) {
+					return value;
+				}
+			});
+		return copyOptions;
+	}
+}