解决jdk11下提示非法的反射警告.

mybatis-plus-core/src/main/java/com/baomidou/mybatisplus/core/toolkit/LambdaUtils.java

@@ -55,7 +55,7 @@ public final class LambdaUtils {
         // 2. 反射读取
         try {
             Method method = func.getClass().getDeclaredMethod("writeReplace");
-            return new ReflectLambdaMeta((SerializedLambda) ReflectionKit.setAccessible(method).invoke(func));
+            return new ReflectLambdaMeta((SerializedLambda) ReflectionKit.setAccessible(method).invoke(func), func.getClass().getClassLoader());
         } catch (Throwable e) {
             // 3. 反射失败使用序列化的方式读取
             return new ShadowLambdaMeta(com.baomidou.mybatisplus.core.toolkit.support.SerializedLambda.extract(func));

mybatis-plus-core/src/main/java/com/baomidou/mybatisplus/core/toolkit/support/ReflectLambdaMeta.java

@@ -15,37 +15,24 @@
  */
 package com.baomidou.mybatisplus.core.toolkit.support;
 
-import com.baomidou.mybatisplus.core.exceptions.MybatisPlusException;
 import com.baomidou.mybatisplus.core.toolkit.ClassUtils;
-import com.baomidou.mybatisplus.core.toolkit.ReflectionKit;
 import com.baomidou.mybatisplus.core.toolkit.StringPool;
 import lombok.extern.slf4j.Slf4j;
 
 import java.lang.invoke.SerializedLambda;
-import java.lang.reflect.Field;
 
 /**
  * Created by hcl at 2021/5/14
  */
 @Slf4j
 public class ReflectLambdaMeta implements LambdaMeta {
-    private static final Field FIELD_CAPTURING_CLASS;
-
-    static {
-        Field fieldCapturingClass = null;
-        try {
-            Class<SerializedLambda> aClass = SerializedLambda.class;
-            fieldCapturingClass = ReflectionKit.setAccessible(aClass.getDeclaredField("capturingClass"));
-        } catch (Throwable e) {
-            // ignore
-        }
-        FIELD_CAPTURING_CLASS = fieldCapturingClass;
-    }
-
     private final SerializedLambda lambda;
 
-    public ReflectLambdaMeta(SerializedLambda lambda) {
+    private final ClassLoader classLoader;
+
+    public ReflectLambdaMeta(SerializedLambda lambda, ClassLoader classLoader) {
         this.lambda = lambda;
+        this.classLoader = classLoader;
     }
 
     @Override
@@ -57,19 +44,7 @@ public class ReflectLambdaMeta implements LambdaMeta {
     public Class<?> getInstantiatedClass() {
         String instantiatedMethodType = lambda.getInstantiatedMethodType();
         String instantiatedType = instantiatedMethodType.substring(2, instantiatedMethodType.indexOf(StringPool.SEMICOLON)).replace(StringPool.SLASH, StringPool.DOT);
-        return ClassUtils.toClassConfident(instantiatedType, getCapturingClassClassLoader());
-    }
-
-    private ClassLoader getCapturingClassClassLoader() {
-        // 如果反射失败，使用默认的 classloader
-        if (FIELD_CAPTURING_CLASS == null) {
-            return null;
-        }
-        try {
-            return ((Class<?>) FIELD_CAPTURING_CLASS.get(lambda)).getClassLoader();
-        } catch (IllegalAccessException e) {
-            throw new MybatisPlusException(e);
-        }
+        return ClassUtils.toClassConfident(instantiatedType, this.classLoader);
     }
 
 }