# 路径参数和数值校验 { #path-parameters-and-numeric-validations }

与使用 `Query` 为查询参数声明更多的校验和元数据的方式相同，你也可以使用 `Path` 为路径参数声明相同类型的校验和元数据。

## 导入 `Path` { #import-path }

首先，从 `fastapi` 导入 `Path`，并导入 `Annotated`：

{* ../../docs_src/path_params_numeric_validations/tutorial001_an_py310.py hl[1,3] *}

/// info | 信息

FastAPI 在 0.95.0 版本添加了对 `Annotated` 的支持（并开始推荐使用它）。

如果你使用的是更旧的版本，尝试使用 `Annotated` 会报错。

        this.numOfThread = value;
    }

    public String getPaths() {
        checkSpecifiedProperty("paths");
        return convertEmptyToNull(paths);
    }

    public void setPaths(String value) {
        registerModifiedProperty("paths");
        this.paths = value;
    }

    public String[] getPermissions() {
        checkSpecifiedProperty("permissions");

    public String regex;

    /**
     * The replacement pattern for matched paths.
     */
    @Size(max = 1000)
    public String replacement;

    /**
     * The processing type for path mapping.
     */
    @Required
    public String processType;

    /**
     * The sort order for this path mapping (0-2147483647).
     */
    @Required
    @Min(value = 0)
    @Max(value = 2147483647)

class ComparableVersionIT {

    @Test
    void test() throws Exception {
        Files.walkFileTree(Paths.get("target"), new SimpleFileVisitor<Path>() {
            Pattern mavenArtifactJar = Pattern.compile("maven-artifact-[\\d.]+(-SNAPSHOT)?\\.jar");

            @Override
            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                String filename = file.getFileName().toString();

        if (StringUtil.isNotBlank(logFilePath) && isLogFilename(filename)) {
            final Path path = Paths.get(logFilePath, filename);
            return asStream(filename).contentTypeOctetStream().stream(out -> {
                try (InputStream in = Files.newInputStream(path)) {
                    out.write(in);
                }
            });
        }

import java.io.File;
import java.nio.file.Path;
import java.util.List;

import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotEquals;

public class JavaPathTypeTest {
    /**
     * {@return dummy paths to use in tests}.
     */
    private static List<Path> paths() {

    }

    /**
     * Validate and normalize a path
     *
     * @param path the path to validate
     * @return normalized safe path
     * @throws SmbException if path is invalid or dangerous
     */
    public String validatePath(String path) throws SmbException {
        if (path == null || path.isEmpty()) {
            throw new SmbException("Path cannot be null or empty");
        }

        // Check length

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.cling.invoker.mvnup;

import java.nio.file.Paths;

import org.apache.maven.cling.invoker.mvnup.goals.TestUtils;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertNotNull;

/**

  <dependencies>
    <dependency>
      <groupId>test</groupId>
      <artifactId>a</artifactId>
      <version>0.2</version>
      <scope>system</scope>
      <systemPath>should-use-variables-and-not-hard-code-this-path</systemPath>
    </dependency>
    <dependency>
      <groupId>test</groupId>
      <artifactId>b</artifactId>
      <version>0.1</version>
      <scope>system</scope>

# Pfad-Parameter und Validierung von Zahlen { #path-parameters-and-numeric-validations }

So wie Sie mit `Query` für Query-Parameter zusätzliche Validierungen und Metadaten deklarieren können, können Sie mit `Path` die gleichen Validierungen und Metadaten für Pfad-Parameter deklarieren.

## `Path` importieren { #import-path }

Importieren Sie zuerst `Path` von `fastapi`, und importieren Sie `Annotated`: