1、 Problem description

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

2、 Solutions

There are many versions on the Internet,

1. Reduce JDK version, such as using java 11, change to Java 8

2. Add the following method to the startup class. Call this method when starting springboot to test the effectiveness of JDK 11

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);
  }