修复CopyOptions.setFieldValueEditor后生成null值setIgnoreNullValue无效问题

hutool-core/src/test/java/cn/hutool/core/bean/Issue3702Test.java

@@ -0,0 +1,41 @@
+package cn.hutool.core.bean;
+
+import cn.hutool.core.bean.copier.CopyOptions;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * setFieldValueEditor编辑后的值理应继续判断ignoreNullValue
+ */
+public class Issue3702Test {
+	@Test
+	void mapToMapTest() {
+		Map<String,String> map= new HashMap<>();
+		map.put("a","");
+		map.put("b","b");
+		map.put("c","c");
+		map.put("d","d");
+
+		Map<String,String> map2= new HashMap<>();
+		map2.put("a","a1");
+		map2.put("b","b1");
+		map2.put("c","c1");
+		map2.put("d","d1");
+
+		CopyOptions option= CopyOptions.create()
+			.setIgnoreNullValue(true)
+			.setIgnoreError(true)
+			.setFieldValueEditor((name, value)->{
+			if(value.equals("")){
+				value=null;
+			}
+			return value;
+		});
+		BeanUtil.copyProperties(map,map2,option);
+		Assertions.assertEquals("{a=a1, b=b, c=c, d=d}", map2.toString());
+		System.out.println(map2);
+	}
+}