**FastAPI CLI** 是一个命令行程序，你可以用它来部署和运行你的 FastAPI 应用程序，管理你的 FastAPI 项目，等等。

当你安装 FastAPI 时（例如使用 `pip install FastAPI` 命令），会包含一个名为 `fastapi-cli` 的软件包，该软件包在终端中提供 `fastapi` 命令。

要在开发环境中运行你的 FastAPI 应用，你可以使用 `fastapi dev` 命令：

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev <u style="text-decoration-style:solid">main.py</u>

各个章节的内容循序渐进，但是又围绕着单独的主题，所以您可以直接跳转到某个章节以解决您的特定需求。

本教程同样可以作为将来的参考手册，所以您可以随时回到本教程并查阅您需要的内容。

## 运行代码

所有代码片段都可以复制后直接使用（它们实际上是经过测试的 Python 文件）。

要运行任何示例，请将代码复制到 `main.py` 文件中，然后使用以下命令启动 `fastapi dev`：

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev <u style="text-decoration-style:solid">main.py</u>

import jakarta.validation.constraints.Min;
import jakarta.validation.constraints.Size;

/**
 * Form class for creating new duplicate host configuration entries.
 * This form handles the creation of duplicate host mappings that redirect
 * crawling from duplicate hostnames to the regular canonical hostname.
 */
public class CreateForm {

    /**
     * Creates a new CreateForm instance.
     */
    public CreateForm() {
    }

import org.lastaflute.web.validation.Required;
import org.lastaflute.web.validation.theme.conversion.ValidateTypeFailure;

import jakarta.validation.constraints.Size;

/**
 * Form class for editing duplicate host configurations in the admin interface.
 * This form extends CreateForm to include fields necessary for updating existing duplicate host entries,

 *
 * <p>This class manages a collection of {@link SmbAuthentication} objects, each associated
 * with a specific path prefix. When a path is provided, it iterates through the stored
 * authentications to find the one whose path prefix matches the beginning of the given path.
 * This allows for different SMB shares to use different authentication credentials.</p>
 *
 */
public class SmbAuthenticationHolder {

 */
package org.codelibs.fess.exception;

/**
 * System exception class for the Fess search engine.
 * This exception is thrown when system-level errors occur in the Fess application,
 * such as configuration errors, initialization failures, or critical runtime issues.
 */
public class FessSystemException extends RuntimeException {

    /** Serial version UID for serialization compatibility */

/**
 * @author shinsuke
 *
 */
public class EncodingHelperTest extends PlainTestCase {
    public EncodingHelper encodingHelper;

    @Override
    protected void setUp() throws Exception {
        super.setUp();
        StandardCrawlerContainer container = new StandardCrawlerContainer().singleton("encodingHelper", EncodingHelper.class);
        encodingHelper = container.getComponent("encodingHelper");
    }

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs.internal.smb2.lease;

/**
 * SMB2 Lease State constants
 *
 * MS-SMB2 2.2.13.2.8
 */
public class Smb2LeaseState {

    /**
     * No lease caching
     */
    public static final int SMB2_LEASE_NONE = 0x00;

    /**
     * Read caching lease (R)
     */

import java.util.Map;

import org.codelibs.core.beans.BeanDesc;
import org.codelibs.core.beans.MethodDesc;
import org.codelibs.core.beans.factory.BeanDescFactory;

/**
 * Utility class for annotations.
 *
 * @author higa
 */
public abstract class AnnotationUtil {

    /**
     * Do not instantiate.
     */
    protected AnnotationUtil() {
    }

    /**

// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
@SuppressWarnings("JUnit4ClassUsedInJUnit3")
@IgnoreJRERequirement // We opt into library desugaring for our tests.
public class ListReplaceAllTester<E> extends AbstractListTester<E> {
  @ListFeature.Require(SUPPORTS_SET)
  public void testReplaceAll() {
    getList().replaceAll(e -> samples.e3());