buf.append("},");
        final Classes classes = jvmStats.getClasses();
        buf.append("\"classes\":{");
        append(buf, "loaded", () -> classes.getLoadedClassCount()).append(',');
        append(buf, "total_loaded", () -> classes.getTotalLoadedClassCount()).append(',');
        append(buf, "unloaded", () -> classes.getUnloadedClassCount());
        buf.append("},");

# Einfaches OAuth2 mit Password und Bearer

Lassen Sie uns nun auf dem vorherigen Kapitel aufbauen und die fehlenden Teile hinzufügen, um einen vollständigen Sicherheits-Flow zu erhalten.

## `username` und `password` entgegennehmen

Wir werden **FastAPIs** Sicherheits-Werkzeuge verwenden, um den `username` und das `password` entgegenzunehmen.

    # - - - - - - - - - -/

    # /- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    # o isAvailableDatabaseNativeJDBC: (NotRequired - Default false)
    #   [true]
    #     Use classes of database native JDBC on generated classes to get best performances of DB access.
    #     Your project needs to refer to database native JDBC.
    #
    #; isAvailableDatabaseNativeJDBC = false
    # - - - - - - - - - -/

 */

/**
 * Collection interfaces and implementations, and other utilities for collections. This package is a
 * part of the open-source <a href="https://github.com/google/guava">Guava</a> library.
 *
 * <p>The classes in this package include:
 *
 * <h2>Immutable collections</h2>
 *
 * These are collections whose contents will never change. They also offer a few additional

 */

/**
 * Collection interfaces and implementations, and other utilities for collections. This package is a
 * part of the open-source <a href="https://github.com/google/guava">Guava</a> library.
 *
 * <p>The classes in this package include:
 *
 * <h2>Immutable collections</h2>
 *
 * These are collections whose contents will never change. They also offer a few additional

 * specific language governing permissions and limitations
 * under the License.
 */

/**
 * Provides the API for the Maven Shell tool ({@code mvnsh}).
 *
 * <p>This package contains interfaces and classes for the interactive Maven shell,
 * which provides a command-line interface for executing Maven commands and
 * managing build environments.</p>
 *
 * <p>Key features include:</p>
 * <ul>

import java.util.Collection;
import java.util.List;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;
import org.junit.Ignore;

/**
 * Base class for testers of classes (including {@link Collection} and {@link java.util.Map Map})
 * that contain elements.
 *
 * @param <C> the type of the container
 * @param <E> the type of the container's contents
 * @author George van den Driessche
 */

Aber ersparen wir Ihnen die Zeit, die gesamte lange Spezifikation zu lesen, nur um die kleinen Informationen zu finden, die Sie benötigen.

Lassen Sie uns die von **FastAPI** bereitgestellten Tools verwenden, um Sicherheit zu gewährleisten.

## Wie es aussieht

Lassen Sie uns zunächst einfach den Code verwenden und sehen, wie er funktioniert, und dann kommen wir zurück, um zu verstehen, was passiert.

## `main.py` erstellen

     */
    boolean isExistClass(final String className);

    /**
     * Searches for classes handled by this instance and calls the handler for each class.
     * <p>
     * If a root package is specified at instance construction, only classes under the root package are targeted.
     * </p>
     *
     * @param handler the handler to process classes
     */
    void forEach(ClassHandler handler);

    /**

        jvmThreadsObj.peak = threads.getPeakCount();
        final Classes classes = jvmStats.getClasses();
        final JvmClassesObj jvmClassesObj = new JvmClassesObj();
        jvmObj.classes = jvmClassesObj;
        jvmClassesObj.loaded = classes.getLoadedClassCount();
        jvmClassesObj.total_loaded = classes.getTotalLoadedClassCount();
        jvmClassesObj.unloaded = classes.getUnloadedClassCount();