基本的步驟大致如下：

1.pom中引入swagger依賴：

<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
</dependency>

<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
</dependency
 
>

2.建立swagger的配置類：

package com.coder520.mamabike.common.swagger;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation
 
.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

@Configuration
@EnableSwagger2
public class SwaggerConfig {

    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.SWAGGER
 
_2)
                .apiInfo(apiInfo())
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.coder520.mamabike"))
                .paths(PathSelectors.any())
                .build();
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("碼碼共享單車API文件")
                .version("1.0")
                .build();
    }

}

然後在controller層的方法中添加註解
比如這樣：

    @ApiOperation(value="簡訊驗證碼",notes = "根據使用者手機號碼傳送驗證碼",httpMethod = "POST")
    @ApiImplicitParam(name = "user",value = "使用者資訊 包含手機號碼",required = true,dataType = "User")
    @RequestMapping("/sendVercode")
    public ApiResult sendVercode(@RequestBody User user,HttpServletRequest request){
        ApiResult<String> resp = new ApiResult<>();

        try {
            if(StringUtils.isEmpty(user.getMobile())){
                throw new MaMaBikeException("手機號碼不能為空");
            }
            userService.sendVercode(user.getMobile(),getIpFromRequest(request));
            resp.setMessage("傳送成功");
        } catch (MaMaBikeException e) {
            resp.setCode(e.getStatusCode());
            resp.setMessage(e.getMessage());
        } catch (Exception e) {
            log.error("Fail to update user info", e);
            resp.setCode(Constants.RESP_STATUS_INTERNAL_ERROR);
            resp.setMessage("內部錯誤");
        }

        return resp;
    }

中間可能會出現json的錯誤，就是你專案中採用的是fastjson，出現錯誤提示

fetching resource list: http://localhost:8080/v2/api-docs; Please wait.

解決方法自行百度把。