Java try 更改静态非最终字段会引发 IllegalArgument 异常

具有私有静态非最终字段的

package sample;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class App {
   private static Logger logger = LoggerFactory.getLogger(App.class);

   public void doSomething() {
      logger.error("Cannot do something");
   }
}

try 通过反射设置此字段

package sample;

import org.apache.logging.log4j.core.Logger;
import org.junit.jupiter.api.Test;
import org.springframework.test.util.ReflectionTestUtils;

import static org.mockito.Mockito.mock;

public class AppTest {

    @Test
    public void doSomething() throws Exception {
        App app = new App();

        Logger mockedLogger = mock(Logger.class);

        ReflectionTestUtils.setField(App.class, "logger", mockedLogger);
    }
}

导致非法ArgumentException

Can not set static org.slf4j.Logger field sample.App.logger to org.apache.logging.log4j.core.Logger$MockitoMock$1185285221
java.lang.IllegalArgumentException: Can not set static org.slf4j.Logger field sample.App.logger to org.apache.logging.log4j.core.Logger$MockitoMock$1185285221
    at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:167)
    at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:171)
    at sun.reflect.UnsafeStaticObjectFieldAccessorImpl.set(UnsafeStaticObjectFieldAccessorImpl.java:79)
    at java.lang.reflect.Field.set(Field.java:764)
    at org.springframework.util.ReflectionUtils.setField(ReflectionUtils.java:633)

根据被调用方法的JavaDocs

https://docs.spring.io/spring-framework/docs/5.2.20.RELEASE/javadoc-api/个

在提供的Target Class上设置具有给定名称的静态字段 设置为提供的值.

支持设置静态字段.