一、问题描述

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils (file:/C:/Users/.m2/repository/org/springframework/spring-core/5.2.8.RELEASE/spring-core-5.2.8.RELEASE.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
WARNING: Please consider reporting this to the maintainers of org.springframework.cglib.core.ReflectUtils
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

二、解决方法

网上给出不少版本，

1、降低jdk版本，如使用的是Java11，改成Java8

2、在启动类增加以下方法，启动springboot的时候调用一下这个方法，亲测试 jdk 11 有效

public static void disableWarning() {
    try {
      Field theUnsafe = Unsafe.class.getDeclaredField("theUnsafe");
      theUnsafe.setAccessible(true);
      Unsafe u = (Unsafe) theUnsafe.get(null);

      Class cls = Class.forName("jdk.internal.module.IllegalAccessLogger");
      Field logger = cls.getDeclaredField("logger");
      u.putObjectVolatile(cls, u.staticFieldOffset(logger), null);
    } catch (Exception e) {
      // ignore
    }
  }

  public static void main(String[] args) {
    disableWarning();
    SpringApplication.run(CpmApiApplication.class, args);
  }