使用swagger作为restful api的doc文档生成
初衷
记得以前写接口，写完后会整理一份API接口文档，而文档的格式如果没有具体要求的话，最终展示的文档则完全决定于开发者的心情。也许多点，也许少点。甚至，接口总是需要适应新需求的，修改了，增加了，这份文档维护起来就很困难了。于是发现了swagger，自动生成文档的工具。
swagger介绍
首先，这样写的：
Swagger – The World's Most Popular Framework for APIs.
因为自强所以自信。swagger官方更新很给力，各种版本的更新都有。swagger会扫描配置的API文档格式自动生成一份json数据，而swagger官方也提供了ui来做通常的展示，当然也支持自定义ui的。不过对后端开发者来说，能用就可以了，官方就可以了。
最强的是，不仅展示API，而且可以调用访问，只要输入参数既可以try it out.
效果为先，最终展示doc界面，也可以设置为中文：
在dropwizard中使用
详细信息见另一篇
在spring-boot中使用
以前总是看各种博客来配置，这次也不例外。百度了千篇一律却又各有细微的差别，甚至时间上、版本上各有不同。最终还是去看官方文档，终于发现了官方的sample。针对于各种option的操作完全在demo中了，所以clone照抄就可以用了。
github
配置
1.需要依赖两个包：
io.springfox springfox-swagger2 ${springfox-version} io.springfox springfox-swagger-ui ${springfox-version}
第一个是API获取的包，第二是官方给出的一个ui界面。这个界面可以自定义，默认是官方的，对于安全问题，以及ui路由设置需要着重思考。
2.swagger的configuration
需要特别注意的是swagger scan base package,这是扫描注解的配置，即你的API接口位置。
@Configuration@EnableSwagger2public class SwaggerConfig { public static final String SWAGGER_SCAN_BASE_PACKAGE = "com.test.web.controllers"; public static final String VERSION = "1.0.0"; ApiInfo apiInfo() { return new ApiInfoBuilder() .title("Swagger API") .description("This is to show api description") .license("Apache 2.0") .licenseUrl("http://www.apache.org/licenses/LICENSE-2.0.html") .termsOfServiceUrl("") .version(VERSION) .contact(new Contact("","", "miaorf@outlook.com")) .build(); } @Bean public Docket customImplementation(){ return new Docket(DocumentationType.SWAGGER_2) .select() .apis(RequestHandlerSelectors.basePackage(SWAGGER_SCAN_BASE_PACKAGE)) .build() .directModelSubstitute(org.joda.time.LocalDate.class, java.sql.Date.class) .directModelSubstitute(org.joda.time.DateTime.class, java.util.Date.class) .apiInfo(apiInfo()); }}
当然，scan package 也可以换成别的条件，比如：
@Bean public Docket api() { return new Docket(DocumentationType.SWAGGER_2) .apiInfo(apiInfo()) .select() .apis(RequestHandlerSelectors.withMethodAnnotation(ApiOperation.class)) .build(); }
3.在API上做一些声明
//本controller的功能描述@Api(value = "pet", description = "the pet API")public interface PetApi { //option的value的内容是这个method的描述，notes是详细描述，response是最终返回的json model。其他可以忽略 @ApiOperation(value = "Add a new pet to the store", notes = "", response = Void.class, authorizations = { @Authorization(value = "petstore_auth", scopes = { @AuthorizationScope(scope = "write:pets", description = "modify pets in your account"), @AuthorizationScope(scope = "read:pets", description = "read your pets") }) }, tags={ "pet", }) //这里是显示你可能返回的http状态，以及原因。比如404 not found, 303 see other @ApiResponses(value = { @ApiResponse(code = 405, message = "Invalid input", response = Void.class) }) @RequestMapping(value = "/pet", produces = { "application/xml", "application/json" }, consumes = { "application/json", "application/xml" }, method = RequestMethod.POST) ResponseEntity addPet( //这里是针对每个参数的描述 @ApiParam(value = "Pet object that needs to be added to the store" ,required=true ) @RequestBody Pet body);} 案例
package com.test.mybatis.web.controllers;import com.test.mybatis.domain.entity.City;import com.test.mybatis.domain.entity.Hotel;import com.test.mybatis.domain.mapper.CityMapper;import com.test.mybatis.domain.mapper.HotelMapper;import com.test.mybatis.domain.model.common.BaseResponse;import io.swagger.annotations.*;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.http.HttpStatus;import org.springframework.http.ResponseEntity;import org.springframework.web.bind.annotation.*;import java.util.List;/** * Created by miaorf on 2016/9/10. */@Api(value = "Test", description = "test the swagger API")@RestControllerpublic class TestController { @Autowired private CityMapper cityMapper; @Autowired private HotelMapper hotelMapper; @ApiOperation(value = "get city by state", notes = "Get city by state", response = City.class) @ApiResponses(value = {@ApiResponse(code = 405, message = "Invalid input", response = City.class) }) @RequestMapping(value = "/city", method = RequestMethod.GET) public ResponseEntity > getCityByState( @ApiParam(value = "The id of the city" ,required=true ) @RequestParam String state){ City city = cityMapper.findByState(state); if (city!=null){ BaseResponse response = new BaseResponse(city,true,null); return new ResponseEntity<>(response, HttpStatus.OK); } return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR); } @ApiOperation(value = "save city", notes = "", response = City.class) @RequestMapping(value = "/city", method = RequestMethod.POST) public ResponseEntity > saveCity( @ApiParam(value = "The id of the city" ,required=true ) @RequestBody City city){ int save = cityMapper.save(city); if (save>0){ BaseResponse response = new BaseResponse(city,true,null); return new ResponseEntity<>(response, HttpStatus.OK); } return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR); } @ApiOperation(value = "save hotel", notes = "", response = Hotel.class) @RequestMapping(value = "/hotel", method = RequestMethod.POST) public ResponseEntity > saveHotel( @ApiParam(value = "hotel" ,required=true ) @RequestBody Hotel hotel){ int save = hotelMapper.save(hotel); if (save>0){ BaseResponse response = new BaseResponse(hotel,true,null); return new ResponseEntity<>(response, HttpStatus.OK); } return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR); } @ApiOperation(value = "get the hotel", notes = "get the hotel by the city id", response = Hotel.class) @RequestMapping(value = "/hotel", method = RequestMethod.GET) public ResponseEntity > getHotel( @ApiParam(value = "the hotel id" ,required=true ) @RequestParam Long cid){ List hotels = hotelMapper.selectByCityId(cid); return new ResponseEntity<>(new BaseResponse(hotels,true,null), HttpStatus.OK); } @ApiOperation(value = "update the hotel", notes = "update the hotel", response = Hotel.class) @RequestMapping(value = "/hotel", method = RequestMethod.PUT) public ResponseEntity > updateHotel( @ApiParam(value = "the hotel" ,required=true ) @RequestBody Hotel hotel){ int result = hotelMapper.update(hotel); return new ResponseEntity<>(new BaseResponse(result,true,null), HttpStatus.OK); } @ApiOperation(value = "delete the hotel", notes = "delete the hotel by the hotel id", response = City.class) @RequestMapping(value = "/hotel", method = RequestMethod.DELETE) public ResponseEntity > deleteHotel( @ApiParam(value = "the hotel id" ,required=true ) @RequestParam Long htid){ int result = hotelMapper.delete(htid); return new ResponseEntity<>(new BaseResponse(result,true,null), HttpStatus.OK); }} 4.设定访问API doc的路由
在配置文件中，application.yml中声明：
springfox.documentation.swagger.v2.path: /api-docs
这个path就是json的访问request mapping.可以自定义，防止与自身代码冲突。
API doc的显示路由是：http://localhost:8080/swagger-ui.html
如果项目是一个webservice，通常设定home / 指向这里：
@Controllerpublic class HomeController { @RequestMapping(value = "/swagger") public String index() { System.out.println("swagger-ui.html"); return "redirect:swagger-ui.html"; }} 5.访问
就是上面的了。但是，注意到安全问题就会感觉困扰。首先，该接口请求有几个：
http://localhost:8080/swagger-resources/configuration/uihttp://localhost:8080/swagger-resources http://localhost:8080/api-docs http://localhost:8080/swagger-resources/configuration/security
除却自定义的url，还有2个ui显示的API和一个安全问题的API。关于安全问题的配置还没去研究，但目前发现一个问题是在我的一个项目中，所有的url必须带有query htid=xxx,这是为了sso portal验证的时候需要。这样这个几个路由就不符合要求了。
如果不想去研究安全问题怎么解决，那么可以自定ui。只需要将ui下面的文件拷贝出来，然后修改请求数据方式即可。
6. 设置在生产环境关闭swagger
具体参考
参考：
1.swagger官网：
2.github：
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