import org.springframework.jmx.support.MBeanRegistrationSupport; //导入依赖的package包/类
/**
 * Instantiates a new dynamic MBean exporter.
 */
public DynamicMBeanExporter() 
{ 
    // For consistency, try to continue to use the last MBeanServer used in the same thread 
    MBeanServer server = threadServer.get(); 
    if (server != null) 
    { 
        setServer(server); 
    } 

    // Make replace existing the default registration behavior 
    setRegistrationBehavior(MBeanRegistrationSupport.REGISTRATION_REPLACE_EXISTING); 
    setAutodetectMode(MBeanExporter.AUTODETECT_NONE); 
}
 

import org.springframework.jmx.support.MBeanRegistrationSupport; //导入依赖的package包/类
public MBeanExporter() {
    setAssembler(new AnnotationMBeanInfoAssembler());
    // hack logging
    try {
        Field loggerField = MBeanRegistrationSupport.class.getDeclaredField("logger");
        loggerField.setAccessible(true);
        loggerField.set(this, LogFactory.getLog(org.springframework.jmx.export.MBeanExporter.class));
    } catch (NoSuchFieldException | IllegalAccessException ignore) {
    }
}