# 关于 FastAPI 版本

**FastAPI** 已在许多应用程序和系统的生产环境中使用。 并且测试覆盖率保持在100%。 但其开发进度仍在快速推进。

经常添加新功能，定期修复错误，并且代码仍在持续改进。

这就是为什么当前版本仍然是`0.x.x`，这反映出每个版本都可能有Breaking changes。 这遵循<a href="https://semver.org/" class="external-link" target="_blank">语义版本控制</a>的约定。

你现在就可以使用 **FastAPI** 创建生产环境应用程序（你可能已经这样做了一段时间），你只需确保使用的版本可以与其余代码正确配合即可。

## 固定你的 `fastapi` 版本

你应该做的第一件事是将你正在使用的 **FastAPI** 版本“固定”到你知道适用于你的应用程序的特定最新版本。

例如，假设你在应用程序中使用版本`0.45.0`。

import org.codelibs.core.exception.MethodNotStaticRuntimeException;
import org.codelibs.core.lang.MethodUtil;

/**
 * Implementation class of {@link MethodDesc}.
 *
 * @author koichik
 */
public class MethodDescImpl implements MethodDesc {

    /** The {@link BeanDesc} of the class that owns this method */
    protected final BeanDesc beanDesc;

    /** The method */
    protected final Method method;

/**
 * Utility for converting time-representing objects to {@link Date}, {@link Calendar}, or {@link Time}.
 * <p>
 * For objects representing only dates, see {@link DateConversionUtil}. For objects representing both date and time,
 * refer to {@link TimestampConversionUtil}.
 * </p>
 * <p>
 * If the source object is an instance of {@link Date}, {@link Calendar}, or {@link Time},

  }

  /**
   * A sensible implementation of {@link SortedMultiset#elementSet} in terms of the following
   * methods: {@link SortedMultiset#clear}, {@link SortedMultiset#comparator}, {@link
   * SortedMultiset#contains}, {@link SortedMultiset#containsAll}, {@link SortedMultiset#count},
   * {@link SortedMultiset#firstEntry} {@link SortedMultiset#headMultiset}, {@link

     * @param beanDesc
     *            The {@link BeanDesc}. Must not be {@literal null}.
     */
    public PropertyDescImpl(final String propertyName, final Class<?> propertyType, final Method readMethod, final Method writeMethod,
            final BeanDesc beanDesc) {
        this(propertyName, propertyType, readMethod, writeMethod, null, beanDesc);
    }

    /**
     * Creates an instance of {@link PropertyDescImpl}.
     *

    * `Path()`
    * `Query()`
    * `Header()`
    * `Cookie()`

  public @Nullable E lower(@ParametricNullness E e) {
    return delegate().lower(e);
  }

  /**
   * A sensible definition of {@link #lower} in terms of the {@code descendingIterator} method of
   * {@link #headSet(Object, boolean)}. If you override {@link #headSet(Object, boolean)}, you may
   * wish to override {@link #lower} to forward to this implementation.
   */
  protected @Nullable E standardLower(@ParametricNullness E e) {

/**
 * Utility for converting objects representing date and time to {@link Date}, {@link Calendar}, and {@link Timestamp}.
 * <p>
 * For objects representing only dates, use {@link DateConversionUtil}. For objects representing only time, see {@link TimeConversionUtil}.
 * </p>
 * <p>
 * If the source object is a {@link Date}, {@link Calendar}, or {@link Timestamp}, the converted object is created using their millisecond value.

   *
   * <p>If the dataset contains {@link Double#NaN} then the result is {@link Double#NaN}. If it
   * contains both {@link Double#POSITIVE_INFINITY} and {@link Double#NEGATIVE_INFINITY} then the
   * result is {@link Double#NaN}. If it contains {@link Double#POSITIVE_INFINITY} and finite values
   * only or {@link Double#POSITIVE_INFINITY} only, the result is {@link Double#POSITIVE_INFINITY}.

    protected Pattern getEncodingPattern() {
        return xmlEncodingPattern;
    }

    /**
     * Returns the precompiled {@link Pattern} used to match XML tags within the content.
     * This pattern is utilized by the extractor to identify and process XML elements.
     *
     * @return the {@link Pattern} instance for XML tag matching
     */
    @Override
    protected Pattern getTagPattern() {
        return xmlTagPattern;