## 混合使用 `Path`、`Query` 和请求体参数

首先，毫无疑问地，你可以随意地混合使用 `Path`、`Query` 和请求体参数声明，**FastAPI** 会知道该如何处理。

你还可以通过将默认值设置为 `None` 来将请求体参数声明为可选参数：

{* ../../docs_src/body_multiple_params/tutorial001_an_py310.py hl[18:20] *}

/// note

请注意，在这种情况下，将从请求体获取的 `item` 是可选的。因为它的默认值为 `None`。

///

## 多个请求体参数

在上面的示例中，*路径操作*将期望一个具有 `Item` 的属性的 JSON 请求体，就像：

```JSON
{
    "name": "Foo",
    "description": "The pretender",

import java.util.List;

import org.apache.maven.execution.MavenSession;
import org.apache.maven.lifecycle.internal.builder.BuilderCommon;
import org.apache.maven.project.MavenProject;

/**
 * <strong>NOTE:</strong> This class is not part of any public api and can be changed or deleted without prior notice.
 *
 * @since 3.0
 */
@Named
@Singleton
public class BuildListCalculator {

import org.apache.maven.project.MavenProject;

/**
 * <p>
 * Wraps individual MojoExecutions, containing information about completion status and scheduling.
 * </p>
 * <strong>NOTE:</strong> This class is not part of any public api and can be changed or deleted without prior notice.
 *
 * @since 3.0
 */
public class ExecutionPlanItem {
    private final MojoExecution mojoExecution;

 * the projects serially, but a {@link Builder} can employ any type of concurrency model to build the projects.
 * </p>
 * <strong>Note:</strong> This interface is part of work in progress and can be changed or removed without notice.
 */
public interface Builder {
    //

No devuelve un gran `str` que contenga los datos en formato JSON (como una cadena de texto). Devuelve una estructura de datos estándar de Python (por ejemplo, un `dict`) con valores y sub-valores que son todos compatibles con JSON.

/// note | Nota

`jsonable_encoder` es utilizado internamente por **FastAPI** para convertir datos. Pero es útil en muchos otros escenarios.

Es wird also kein großer `str` zurückgegeben, der die Daten im JSON-Format (als String) enthält. Es wird eine Python-Standarddatenstruktur (z. B. ein `dict`) zurückgegeben, mit Werten und Unterwerten, die alle mit JSON kompatibel sind.

/// note | Hinweis

`jsonable_encoder` wird tatsächlich von **FastAPI** intern verwendet, um Daten zu konvertieren. Aber es ist in vielen anderen Szenarien hilfreich.

 */
public class EmptyLifecyclePluginAnalyzer implements LifeCyclePluginAnalyzer {
    @Override
    public Set<Plugin> getPluginsBoundByDefaultToAllLifecycles(String packaging) {
        Set<Plugin> plugins;

        // NOTE: The upper-case packaging name is intentional, that's a special hinting mode used for certain tests
        if ("JAR".equals(packaging)) {
            plugins = new LinkedHashSet<>();

# See the License for the specific language governing permissions and
# limitations under the License.
# ==============================================================================
# Note: this file gets sourced in utilities/setup.sh, which has "set -u"
# (error on undefined variables). This ensures that (a) every TFCI variable
# has an explicit default value, and (b) no script can accidentally use a

<span style="color: green;">INFO</span>:     Waiting for application startup.
<span style="color: green;">INFO</span>:     Application startup complete.
```

</div>

/// note | 참고

`uvicorn main:app` 명령은 다음을 의미합니다:

* `main`: 파일 `main.py` (파이썬 "모듈").
* `app`: `main.py` 내부의 `app = FastAPI()` 줄에서 생성한 오브젝트.
* `--reload`: 코드 변경 시 자동으로 서버 재시작. 개발 시에만 사용.

///

        versions = new LinkedHashMap<>();
        processedVersions = new LinkedHashMap<>();
        timestamp = (Date) ConfigUtils.getObject(session, new Date(), "maven.startTime");

        /*
         * NOTE: This should be considered a quirk to support interop with Maven's legacy ArtifactDeployer which
         * processes one artifact at a time and hence cannot associate the artifacts from the same project to use the