4.7.3. 创建 MicroProfile OpenAPI 应用

流程

1. 创建用于存储类文件的目录：

   $ mkdir -p APPLICATION_ROOT/src/main/java/com/example/microprofile/openapi/

   APPLICATION_ROOT 是含有应用的 pom.xml 配置文件的目录。

2. 进入新目录：

   $ cd APPLICATION_ROOT/src/main/java/com/example/microprofile/openapi/

   必须在此目录中创建下列步骤中的所有类文件。

3. 使用以下内容创建类文件 InventoryApplication.java ：

   package com.example.microprofile.openapi;
   
   import javax.ws.rs.ApplicationPath;
   import javax.ws.rs.core.Application;
   
   @ApplicationPath("/inventory")
   public class InventoryApplication extends Application {
   }

   此类充当应用的 REST 端点。

4. 创建包含以下内容的类文件 Fruit.java ：

   package com.example.microprofile.openapi;
   
   public class Fruit {
   
       private final String name;
       private final String description;
   
       public Fruit(String name, String description) {
           this.name = name;
           this.description = description;
       }
   
       public String getName() {
           return this.name;
       }
   
       public String getDescription() {
           return this.description;
       }
   }

5. 创建包含以下内容的类文件 FruitResource.java ：

   package com.example.microprofile.openapi;
   
   import java.util.Collections;
   import java.util.LinkedHashMap;
   import java.util.Set;
   
   import javax.ws.rs.Consumes;
   import javax.ws.rs.DELETE;
   import javax.ws.rs.GET;
   import javax.ws.rs.POST;
   import javax.ws.rs.Path;
   import javax.ws.rs.Produces;
   import javax.ws.rs.core.MediaType;
   
   @Path("/fruit")
   @Produces(MediaType.APPLICATION_JSON)
   @Consumes(MediaType.APPLICATION_JSON)
   public class FruitResource {
   
       private final Set<Fruit> fruits = Collections.newSetFromMap(Collections.synchronizedMap(new LinkedHashMap<>()));
   
       public FruitResource() {
           this.fruits.add(new Fruit("Apple", "Winter fruit"));
           this.fruits.add(new Fruit("Pineapple", "Tropical fruit"));
       }
   
       @GET
       public Set<Fruit> all() {
           return this.fruits;
       }
   
       @POST
       public Set<Fruit> add(Fruit fruit) {
           this.fruits.add(fruit);
           return this.fruits;
       }
   
       @DELETE
       public Set<Fruit> remove(Fruit fruit) {
           this.fruits.removeIf(existingFruit -> existingFruit.getName().contentEquals(fruit.getName()));
           return this.fruits;
       }
   }

6. 进入应用程序的根目录：

   $ cd APPLICATION_ROOT

7. 使用以下 Maven 命令构建和部署应用程序：

   $ mvn wildfly:deploy

8. 测试应用。

   • 使用 curl 访问示例应用程序的 OpenAPI 文档：

     $ curl http://localhost:8080/openapi

   • 返回以下输出：

     openapi: 3.0.1
     info:
       title: Archetype Created Web Application
       version: "1.0"
     servers:
     - url: /microprofile-openapi
     paths:
       /inventory/fruit:
         get:
           responses:
             "200":
               description: OK
               content:
                 application/json:
                   schema:
                     type: array
                     items:
                       $ref: '#/components/schemas/Fruit'
         post:
           requestBody:
             content:
               application/json:
                 schema:
                   $ref: '#/components/schemas/Fruit'
           responses:
             "200":
               description: OK
               content:
                 application/json:
                   schema:
                     type: array
                     items:
                       $ref: '#/components/schemas/Fruit'
         delete:
           requestBody:
             content:
               application/json:
                 schema:
                   $ref: '#/components/schemas/Fruit'
           responses:
             "200":
               description: OK
               content:
                 application/json:
                   schema:
                     type: array
                     items:
                       $ref: '#/components/schemas/Fruit'
     components:
       schemas:
         Fruit:
           type: object
           properties:
             description:
               type: string
             name:
               type: string