fix code

hutool-core/src/main/java/cn/hutool/core/lang/func/LambdaFactory.java

@@ -4,10 +4,7 @@ import cn.hutool.core.exceptions.UtilException;
 import cn.hutool.core.lang.Assert;
 import cn.hutool.core.lang.mutable.MutableEntry;
 import cn.hutool.core.map.WeakConcurrentMap;
-import cn.hutool.core.reflect.LookupFactory;
+import cn.hutool.core.reflect.*;
-import cn.hutool.core.reflect.MethodUtil;
-import cn.hutool.core.reflect.ModifierUtil;
-import cn.hutool.core.reflect.ReflectUtil;
 
 import java.io.Serializable;
 import java.lang.invoke.*;
@@ -80,23 +77,23 @@ public class LambdaFactory {
 					.collect(Collectors.toList());
 			Assert.equals(abstractMethods.size(), 1, "不支持非函数式接口");
 			ReflectUtil.setAccessible(executable);
+
+			final MethodHandle methodHandle = MethodHandleUtil.unreflect(executable);
+			final MethodType instantiatedMethodType;
+			if (executable instanceof Method) {
+				final Method method = (Method) executable;
+				instantiatedMethodType = MethodType.methodType(method.getReturnType(), method.getDeclaringClass(), method.getParameterTypes());
+			} else {
+				final Constructor<?> constructor = (Constructor<?>) executable;
+				instantiatedMethodType = MethodType.methodType(constructor.getDeclaringClass(), constructor.getParameterTypes());
+			}
+			final boolean isSerializable = Serializable.class.isAssignableFrom(functionInterfaceType);
+
 			final Method invokeMethod = abstractMethods.get(0);
 			final MethodHandles.Lookup caller = LookupFactory.lookup(executable.getDeclaringClass());
 			final String invokeName = invokeMethod.getName();
 			final MethodType invokedType = methodType(functionInterfaceType);
 			final MethodType samMethodType = methodType(invokeMethod.getReturnType(), invokeMethod.getParameterTypes());
-			final MethodHandle implMethod;
-			final MethodType instantiatedMethodType;
-			if (executable instanceof Method) {
-				final Method method = (Method) executable;
-				implMethod = ((SerSupplier<MethodHandle>) () -> MethodHandles.lookup().unreflect(method)).get();
-				instantiatedMethodType = MethodType.methodType(method.getReturnType(), method.getDeclaringClass(), method.getParameterTypes());
-			} else {
-				final Constructor<?> constructor = (Constructor<?>) executable;
-				implMethod = ((SerSupplier<MethodHandle>) () -> MethodHandles.lookup().unreflectConstructor(constructor)).get();
-				instantiatedMethodType = MethodType.methodType(constructor.getDeclaringClass(), constructor.getParameterTypes());
-			}
-			final boolean isSerializable = Serializable.class.isAssignableFrom(functionInterfaceType);
 			try {
 				final CallSite callSite = isSerializable ?
 						LambdaMetafactory.altMetafactory(
@@ -104,7 +101,7 @@ public class LambdaFactory {
 								invokeName,
 								invokedType,
 								samMethodType,
-								implMethod,
+								methodHandle,
 								instantiatedMethodType,
 								FLAG_SERIALIZABLE
 						) :
@@ -113,7 +110,7 @@ public class LambdaFactory {
 								invokeName,
 								invokedType,
 								samMethodType,
-								implMethod,
+								methodHandle,
 								instantiatedMethodType
 						);
 				//noinspection unchecked

hutool-core/src/main/java/cn/hutool/core/reflect/LookupFactory.java

@@ -1,6 +1,7 @@
 package cn.hutool.core.reflect;
 
 import cn.hutool.core.exceptions.UtilException;
+import cn.hutool.core.lang.caller.CallerUtil;
 import cn.hutool.core.util.JdkUtil;
 
 import java.lang.invoke.MethodHandles;
@@ -42,6 +43,16 @@ public class LookupFactory {
 		}
 	}
 
+	/**
+	 * jdk8中如果直接调用{@link MethodHandles#lookup()}获取到的{@link MethodHandles.Lookup}在调用findSpecial和unreflectSpecial
+	 * 时会出现权限不够问题，抛出"no private access for invokespecial"异常，因此针对JDK8及JDK9+分别封装lookup方法。
+	 *
+	 * @return {@link MethodHandles.Lookup}
+	 */
+	public static MethodHandles.Lookup lookup() {
+		return lookup(CallerUtil.getCaller());
+	}
+
 	/**
 	 * jdk8中如果直接调用{@link MethodHandles#lookup()}获取到的{@link MethodHandles.Lookup}在调用findSpecial和unreflectSpecial
 	 * 时会出现权限不够问题，抛出"no private access for invokespecial"异常，因此针对JDK8及JDK9+分别封装lookup方法。

hutool-core/src/main/java/cn/hutool/core/reflect/MethodHandleUtil.java

@@ -1,12 +1,14 @@
 package cn.hutool.core.reflect;
 
-import cn.hutool.core.lang.Assert;
 import cn.hutool.core.exceptions.UtilException;
+import cn.hutool.core.lang.Assert;
 import cn.hutool.core.text.StrUtil;
 
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
 import java.lang.invoke.MethodType;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Member;
 import java.lang.reflect.Method;
 
 /**
@@ -28,6 +30,24 @@ import java.lang.reflect.Method;
  */
 public class MethodHandleUtil {
 
+	/**
+	 * 将{@link Method}或者{@link Constructor} 包装为方法句柄{@link MethodHandle}
+	 *
+	 * @param methodOrConstructor {@link Method}或者{@link Constructor}
+	 * @return 方法句柄{@link MethodHandle}
+	 */
+	public static MethodHandle unreflect(final Member methodOrConstructor) {
+		try {
+			if (methodOrConstructor instanceof Method) {
+				return LookupFactory.lookup().unreflect((Method) methodOrConstructor);
+			} else {
+				return LookupFactory.lookup().unreflectConstructor((Constructor<?>) methodOrConstructor);
+			}
+		} catch (final IllegalAccessException e) {
+			throw new UtilException(e);
+		}
+	}
+
 	/**
 	 * 查找指定方法的方法句柄<br>
 	 * 此方法只会查找：