Swagger 接口文档

目录

• Swagger 介绍
• Swagger 依赖
• SpringBoot 集成 Swagger 配置类
• 常用注解
• 效果示例

Swagger 介绍

Swagger UI 允许任何人（无论是开发团队还是最终用户）都可以可视化 API 资源并与之交互，而无需任何实现逻辑。

Swagger API 文档是根据 OpenAPI（以前称为 Swagger）规范自动生成的，可简化后端实现和客户端的使用。

Swagger 依赖

        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>2.9.2</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-bean-validators</artifactId>
            <version>2.8.0</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>2.9.2</version>
        </dependency>
        <dependency>
            <groupId>io.swagger</groupId>
            <artifactId>swagger-annotations</artifactId>
            <version>1.5.21</version>
        </dependency>
        <dependency>
            <groupId>io.swagger</groupId>
            <artifactId>swagger-models</artifactId>
            <version>1.5.21</version>
        </dependency>

SpringBoot 集成 Swagger 配置类

package com.example.apitestplatform.config;

import com.google.common.collect.Lists;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.ParameterBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.schema.ModelRef;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.Contact;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

/**
 * Swagger 文档配置类
 */
@Configuration
@EnableSwagger2
public class SwaggerConfig {

    @Bean
    public Docket docket() {
        ParameterBuilder builder=new ParameterBuilder();
        builder.parameterType("header")
                .name("token")
                .description("token值")
                .required(true)
                .modelRef(new ModelRef("string"));  // 在swagger文档里展示header

        return new Docket(DocumentationType.SWAGGER_2)
                .groupName("ApiDemo")
                .apiInfo(apiInfo())
                .globalOperationParameters(Lists.newArrayList(builder.build()))
                .select()  // 选择生成策略
                .apis(RequestHandlerSelectors.basePackage("com.example.apitestplatform.controller"))  // 选择生成文档的类（忽略该行则不做过滤）
                .paths(PathSelectors.any())
                .build();
    }

    // 定义接口文档基本信息
    private ApiInfo apiInfo(){
        return new ApiInfoBuilder()
                .title("ApiDemo 系统")  // 接口文档标题
                .description("ApiDemo 接口文档")  // 接口文档描述
                .contact(new Contact("xiaoming", "", "103@qq.com"))  // 作者联系方式
                .version("1.0")  // 接口文档版本
                .build();
    }
}

常用注解

• @Api(tags="API 类标题")
• @ApiOperation(value="API 方法标题")
• @ApiModel(value="实体类标题", description="实体类描述")
• @ApiModelProperty(value="实体属性描述"，example="属性示例取值", required=true)

示例：

• 接口类：

package com.example.apitestplatform.controller;

import com.example.apitestplatform.entity.User;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.*;

@Api(tags="Swagger Demo 类")
@RestController
@RequestMapping(value="demo")  // 类中所有接口地址的前缀
public class DemoController {

    @Value("${user.hobby}")
    private String hobby;

    @ApiOperation(value="Swagger Demo get方法")
    // @RequestMapping(value="loginGet", method= RequestMethod.GET)
    @GetMapping("loginGet")
    public String loginGet() {
        return hobby;
    }

    // @RequestMapping(value="loginPost", method= RequestMethod.POST)
    @PostMapping("loginPost")  // 简便写法
    public String loginPost(@RequestBody User user) {  // 如果没用 @RequestBody，则获取结果为 null
        System.out.println("username : "+user.getUsername());
        System.out.println("password : "+user.getPassword());
        return "登录成功："+user.getUsername();
    }

    // 访问：http://localhost:8080/demo/userId/1/2
    // @RequestMapping(value="userId/{userId}/{id}", method=RequestMethod.GET)
    @GetMapping("getUser/{userid}/{id}")
    public String loginUser1(@PathVariable("userid") Integer userid, @PathVariable("id") Integer id) {
        System.out.println("userid : "+userid);
        System.out.println("id : "+id);
        return "userid: "+userid+"  id: "+id;
    }

    // 访问：http://localhost:8080/demo/getUser?userid=1&id=2
    // 访问：http://localhost:8080/demo/getUser?user=1&id=2，则 userid 值为 null
    @GetMapping("getUser")
    public String loginUser2(@RequestParam(value="userid", required=false) Integer userid,  // required=false：参数非必须传
                             @RequestParam("id") Integer id) {
        System.out.println("userid : "+userid);
        System.out.println("id : "+id);
        return "userid: "+userid+"  id: "+id;
    }
}

• User 类：

package com.example.apitestplatform.entity;

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;

@ApiModel(value="用户类", description="用户信息")
@Data
public class User {

    @ApiModelProperty(value="用户名", example="xiaoming", required=true)
    private String username;
    @ApiModelProperty(value="密码", example="123456", required=true)
    private String password;
}

效果示例