## 总结

你能够以与 [查询参数和字符串校验](query-params-str-validations.md){.internal-link target=_blank} 相同的方式使用 `Query`、`Path`（以及其他你还没见过的类）声明元数据和字符串校验。

而且你还可以声明数值校验：

* `gt`：大于（`g`reater `t`han）
* `ge`：大于等于（`g`reater than or `e`qual）
* `lt`：小于（`l`ess `t`han）
* `le`：小于等于（`l`ess than or `e`qual）

/// info

`Query`、`Path` 以及你后面会看到的其他类继承自一个共同的 `Param` 类（不需要直接使用它）。

而且它们都共享相同的所有你已看到并用于添加额外校验和元数据的参数。

///

 * Response caching avoids the network completely for repeat requests.

OkHttp perseveres when the network is troublesome: it will silently recover from common connection
problems. If your service has multiple IP addresses, OkHttp will attempt alternate addresses if the
first connect fails. This is necessary for IPv4+IPv6 and services hosted in redundant data

configuration necessary to connect to that server: the port number, HTTPS settings, and preferred network protocols (like HTTP/2).

URLs that share the same address may also share the same underlying TCP socket connection. Sharing a connection has substantial performance benefits: lower latency, higher throughput (due to [TCP slow start](https://www.igvita.com/2011/10/20/faster-web-vs-tcp-slow-start/)) and conserved battery. OkHttp uses a [ConnectionPool](https://square.github.io/okhttp/4.x/...

     * @since 4.0.0
     */
    public FileSource(Path path) {
        this.path = Objects.requireNonNull(path, "path cannot be null").toAbsolutePath();
        this.hashCode = Objects.hash(path);
    }

    @Override
    public InputStream getInputStream() throws IOException {
        return Files.newInputStream(path);
    }

    @Override
    public String getLocation() {

    collection = getSubjectGenerator().create(elements.toArray());
    assertEquals(
        "A Set's hashCode() should be the sum of those of its elements (with "
            + "a null element counting as having a hash of zero).",
        expectedHashCode,
        getSet().hashCode());
  }

  /**
   * Returns the {@link Method} instances for the test methods in this class which call {@code

labels.confirmPassword=Confirm
labels.crawler=Crawler
labels.crudMode=mode
labels.errorCountMax=Max Error Count
labels.errorCountMin=Min Error Count
labels.facet=Facet
labels.geo=Geo
labels.groups=Groups
labels.hash=Hash
labels.kuromojiFile=Kuromoji File
labels.maxSize=Max Size
labels.order=Order
labels.purgeSuggestSearchLogDay=Purge Suggest Documents Before
labels.q=Query
labels.roles=Roles

  public static final int MAX_POWER_OF_TWO = 1 << (Integer.SIZE - 2);

  /**
   * Returns a hash code for {@code value}; equal to the result of invoking {@code ((Integer)
   * value).hashCode()}.
   *
   * <p><b>Java 8+ users:</b> use {@link Integer#hashCode(int)} instead.
   *
   * @param value a primitive {@code int} value
   * @return a hash code for the value
   */
  public static int hashCode(int value) {
    return value;
  }

 * Defines the type of source files to compile, usually either the one that compose the output package
 * (i.e. the <i>main</i> artifact) or the ones that will be used when building <i>tests</i>).
 * <p>
 * This extensible enum has two defined values, {@link #MAIN} and {@link #TEST},
 * but can be extended by registering a {@code org.apache.maven.api.spi.ProjectScopeProvider}.
 * <p>

   *
   * <p>An empty collection has only one permutation, which is an empty list.
   *
   * @param elements the original collection whose elements have to be permuted.
   * @return an immutable {@link Collection} containing all the different permutations of the
   *     original collection.
   * @throws NullPointerException if the specified collection is null or has any null elements.
   * @since 12.0
   */

/// danger | "Gefahr"

Speichern Sie niemals das Klartext-Passwort eines Benutzers. Speichern Sie immer den „sicheren Hash“, den Sie verifizieren können.

Falls Ihnen das nichts sagt, in den [Sicherheits-Kapiteln](security/simple-oauth2.md#passwort-hashing){.internal-link target=_blank} werden Sie lernen, was ein „Passwort-Hash“ ist.

///

## Mehrere Modelle