fix code

hutool-core/src/main/java/cn/hutool/core/bean/copier/BeanToBeanCopier.java

@@ -54,17 +54,17 @@ public class BeanToBeanCopier<S, T> extends AbsCopier<S, T> {
 				return;
 			}
 
-			// 忽略不需要拷贝的 key,
-			if (false == copyOptions.testKeyFilter(sFieldName)) {
-				return;
-			}
-
 			sFieldName = copyOptions.editFieldName(sFieldName);
 			// 对key做转换，转换后为null的跳过
 			if (null == sFieldName) {
 				return;
 			}
 
+			// 忽略不需要拷贝的 key,
+			if (false == copyOptions.testKeyFilter(sFieldName)) {
+				return;
+			}
+
 			// 检查目标字段可写性
 			final PropDesc tDesc = targetPropDescMap.get(sFieldName);
 			if (null == tDesc || false == tDesc.isWritable(this.copyOptions.transientSupport)) {

hutool-core/src/main/java/cn/hutool/core/bean/copier/CopyOptions.java

@@ -8,6 +8,7 @@ import cn.hutool.core.lang.func.Func1;
 import cn.hutool.core.lang.func.LambdaUtil;
 import cn.hutool.core.util.ArrayUtil;
 import cn.hutool.core.util.ObjectUtil;
+import cn.hutool.core.util.StrUtil;
 
 import java.io.Serializable;
 import java.lang.reflect.Field;
@@ -78,12 +79,12 @@ public class CopyOptions implements Serializable {
 	 * 自定义类型转换器，默认使用全局万能转换器转换
 	 */
 	protected TypeConverter converter = (type, value) -> {
-		if(null == value){
+		if (null == value) {
 			return null;
 		}
 
-		if(value instanceof IJSONTypeConverter) {
-			return ((IJSONTypeConverter)value).toBean(ObjectUtil.defaultIfNull(type, Object.class));
+		if (value instanceof IJSONTypeConverter) {
+			return ((IJSONTypeConverter) value).toBean(ObjectUtil.defaultIfNull(type, Object.class));
 		}
 
 		return Convert.convertWithCheck(type, value, null, ignoreError);
@@ -375,6 +376,19 @@ public class CopyOptions implements Serializable {
 	 * @return 是否保留
 	 */
 	protected boolean testKeyFilter(Object key) {
-		return CollUtil.isEmpty(this.ignoreKeySet) || false == this.ignoreKeySet.contains(key);
+		if (CollUtil.isEmpty(this.ignoreKeySet)) {
+			return true;
+		}
+
+		if (ignoreCase) {
+			// 忽略大小写时要遍历检查
+			for (final String ignoreKey : this.ignoreKeySet) {
+				if (StrUtil.equalsIgnoreCase(key.toString(), ignoreKey)) {
+					return false;
+				}
+			}
+		}
+
+		return false == this.ignoreKeySet.contains(key);
 	}
 }

hutool-core/src/test/java/cn/hutool/core/bean/IssueI80FP4Test.java

@@ -0,0 +1,26 @@
+package cn.hutool.core.bean;
+
+import cn.hutool.core.bean.copier.CopyOptions;
+import lombok.Data;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class IssueI80FP4Test {
+	@Test
+	public void copyPropertiesTest() {
+		final Dest sourceDest = new Dest();
+		sourceDest.setCPF(33699);
+		sourceDest.setEnderDest("abc");
+
+		final Dest dest = new Dest();
+		final CopyOptions copyOptions = CopyOptions.create().setIgnoreNullValue(true).setIgnoreCase(true).setIgnoreProperties("enderDest");
+		BeanUtil.copyProperties(sourceDest, dest, copyOptions);
+		Assert.assertNull(dest.getEnderDest());
+	}
+
+	@Data
+	static class Dest{
+		private int cPF;
+		private String enderDest;
+	}
+}