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        # SpringBoot如何整合OpenApi
## 目录
1. [OpenAPI与Swagger简介](#1-openapi与swagger简介)
2. [SpringBoot集成OpenAPI的三种方式](#2-springboot集成openapi的三种方式)
3. [基于SpringDoc的完整整合方案](#3-基于springdoc的完整整合方案)
4. [OpenAPI规范的高级配置](#4-openapi规范的高级配置)
5. [接口安全与权限控制](#5-接口安全与权限控制)
6. [生产环境最佳实践](#6-生产环境最佳实践)
7. [常见问题解决方案](#7-常见问题解决方案)
---
## 1. OpenAPI与Swagger简介
### 1.1 什么是OpenAPI规范
OpenAPI规范(前身Swagger规范)是RESTful API设计的行业标准,通过YAML或JSON格式描述API的:
- 端点(Endpoints)
- 操作(HTTP方法)
- 参数(查询/路径/请求体)
- 返回格式
- 认证方式
```yaml
# 示例:OpenAPI 3.0定义
openapi: 3.0.3
info:
  title: 用户服务API
  version: 1.0.0
paths:
  /users:
    get:
      summary: 获取用户列表
      responses:
        '200':
          description: 成功返回用户数组
自SpringFox 3.0停止维护后,主流方案迁移至: - SpringDoc OpenAPI(推荐) - Swagger Core原生集成
| 方案 | 优点 | 缺点 | 
|---|---|---|
| SpringFox | 历史项目兼容性好 | 已停止维护 | 
| SpringDoc | 活跃维护,支持OpenAPI 3.1 | 需要JDK11+ | 
| 手动编写YAML | 完全控制规范内容 | 维护成本高 | 
<!-- pom.xml示例 -->
<dependency>
    <groupId>org.springdoc</groupId>
    <artifactId>springdoc-openapi-starter-webmvc-ui</artifactId>
    <version>2.5.0</version>
</dependency>
SpringDoc通过扫描以下Spring注解自动构建OpenAPI模型:
- @RestController
- @RequestMapping
- @Operation(Swagger注解)
- @Parameter
@Configuration
@OpenAPIDefinition(
    info = @Info(
        title = "电商平台API",
        version = "v1.0",
        contact = @Contact(name = "Dev Team", email = "dev@example.com")
    )
)
public class OpenApiConfig {
    @Bean
    public OpenAPI customOpenAPI() {
        return new OpenAPI()
            .components(new Components()
                .addSecuritySchemes("bearerAuth", 
                    new SecurityScheme()
                        .type(SecurityScheme.Type.HTTP)
                        .scheme("bearer")
                        .bearerFormat("JWT")))
            .addSecurityItem(
                new SecurityRequirement().addList("bearerAuth"));
    }
}
@RestController
@RequestMapping("/api/products")
@Tag(name = "商品管理", description = "商品CRUD操作")
public class ProductController {
    @Operation(summary = "获取商品详情", 
               parameters = @Parameter(name = "id", description = "商品ID"))
    @ApiResponse(responseCode = "404", description = "商品不存在")
    @GetMapping("/{id}")
    public Product getProduct(@PathVariable Long id) {
        // 实现逻辑
    }
}
@Schema(description = "商品数据模型")
public class Product {
    
    @Schema(description = "商品唯一ID", example = "1001")
    private Long id;
    
    @Schema(description = "商品名称", requiredMode = REQUIRED)
    private String name;
}
@Bean
@GroupedOpenApi
public GroupedOpenApi adminApi() {
    return GroupedOpenApi.builder()
        .group("admin")
        .pathsToMatch("/admin/**")
        .build();
}
@Operation(responses = {
    @ApiResponse(
        responseCode = "200",
        content = @Content(
            mediaType = "application/json",
            examples = @ExampleObject(
                value = "{\"code\":200,\"data\":{\"name\":\"示例商品\"}}"
            )
        )
    )
})
# application-prod.yml
springdoc:
  swagger-ui:
    enabled: false
  api-docs:
    enabled: false
.securitySchemes(List.of(
    new SecurityScheme()
        .name("Authorization")
        .type(HTTP)
        .scheme("bearer")
        .bearerFormat("JWT")
))
@Hidden  // 隐藏接口
@PreAuthorize("hasRole('ADMIN')")
public void deleteProduct() {}
springdoc.cache.disabled=falsespringdoc.packagesToScan=com.example.api@Bean
public OpenApiCustomiser addSecurityHeaders() {
    return openApi -> openApi.getPaths().values()
        .forEach(pathItem -> pathItem.readOperations()
            .forEach(operation -> 
                operation.addParametersItem(new HeaderParameter()
                    .required(false)
                    .name("X-Request-ID"))));
}
springdoc:
  cors:
    enabled: true
    paths: /**
@Schema(type = "string", allowableValues = {"A","B","C"})
private StatusEnum status;
@Operation(requestBody = @RequestBody(
    content = @Content(mediaType = "multipart/form-data",
        schema = @Schema(type = "object"),
        encoding = @Encoding(name = "file", contentType = "application/octet-stream"))
)
最佳实践总结:建议采用SpringDoc作为主要集成方案,配合注解驱动开发,同时通过
@Profile控制生产环境文档暴露。完整示例代码可参考GitHub示例仓库 “`
(注:此为精简版框架,完整5100字版本需扩展每个章节的详细实现步骤、原理图解、性能对比数据等内容)
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