[Swagger2] Swagger2 接口文档引擎的配置和使用

Swagger2 接口文档引擎的配置和使用

Posted by Mr.Vincent on 2019-12-14
Estimated Reading Time 10 Minutes
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手写文档存在的问题

  • 文档需要更新的时候,需要再次发送一份给前端,也就是文档更新交流不及时。
  • 接口返回结果不明确
  • 不能直接在线测试接口,通常需要使用工具,比如:Postman
  • 接口文档太多,不好管理

使用 Swagger 解决问题

Swagger 也就是为了解决这个问题,当然也不能说 Swagger 就一定是完美的,当然也有缺点,最明显的就是代码植入性比较强。Swagger 是一个规范和完整的框架,用于生成、描述、调用和可视化 RESTful 风格的 Web 服务。总体目标是使客户端和文件系统作为服务器以同样的速度来更新。文件的方法,参数和模型紧密集成到服务器端的代码,允许API来始终保持同步。

作用:

  1. 接口的文档在线自动生成。
  2. 功能测试。

Swagger 是一组开源项目,其中主要要项目如下:

  • Swagger-tools:提供各种与Swagger进行集成和交互的工具。例如模式检验、Swagger 1.2文档转换成Swagger 2.0文档等功能。
  • Swagger-core: 用于Java/Scala的的Swagger实现。与JAX-RS(Jersey、Resteasy、CXF…)、Servlets和Play框架进行集成。
  • Swagger-js: 用于JavaScript的Swagger实现。
  • Swagger-node-express: Swagger模块,用于node.js的Express web应用框架。
  • Swagger-ui`:一个无依赖的HTML、JS和CSS集合,可以为Swagger兼容API动态生成优雅文档。
  • Swagger-codegen:一个模板驱动引擎,通过分析用户Swagger资源声明以各种语言生成客户端代码。

Maven

增加 Swagger2 所需依赖,pom.xml 配置如下:

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<!-- Swagger2 Begin -->
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.8.0</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.8.0</version>
</dependency>
<!-- Swagger2 End -->

配置 Swagger2

注意:RequestHandlerSelectors.basePackage("com.funtl.itoken.service.admin.controller") 为 Controller 包路径,不然生成的文档扫描不到接口

创建一个名为 Swagger2Config 的 Java 配置类,代码如下:

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package com.funtl.itoken.service.admin.config;

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;

@Configuration
//@EnableSwagger2 也可以写在 ServiceAdminApplication 启动类上
public class Swagger2Config {
@Bean
public Docket createRestApi() {
return new Docket(DocumentationType.SWAGGER_2)
.apiInfo(apiInfo())
.select()
.apis(RequestHandlerSelectors.basePackage("com.funtl.itoken.service.admin.controller"))
.paths(PathSelectors.any())
.build();
}

private ApiInfo apiInfo() {
return new ApiInfoBuilder()
.title("iToken API 文档")
.description("iToken API 网关接口,http://www.funtl.com")
.termsOfServiceUrl("http://www.funtl.com")
.version("1.0.0")
.build();
}
}

启用 Swagger2

Application 中加上注解 @EnableSwagger2 表示开启 Swagger

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package com.funtl.itoken.service.admin;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import springfox.documentation.swagger2.annotations.EnableSwagger2;
import tk.mybatis.spring.annotation.MapperScan;

@SpringBootApplication(scanBasePackages = "com.funtl.itoken")
@EnableEurekaClient
@EnableSwagger2 //也可以直接写在 Swagger2Config 配置类上面
@MapperScan(basePackages = {"com.funtl.itoken.common.mapper", "com.funtl.itoken.service.admin.mapper"})
public class ServiceAdminApplication {
public static void main(String[] args) {
SpringApplication.run(ServiceAdminApplication.class, args);
}
}

案例:使用 Swagger2

在 Controller 中增加 Swagger2 相关注解,代码如下:

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/**
* 分页查询
*
* @param pageNum
* @param pageSize
* @param tbSysUserJson
* @return
*/
@ApiOperation(value = "管理员分页查询")
@ApiImplicitParams({
@ApiImplicitParam(name = "pageNum", value = "页码", required = true, dataType = "int", paramType = "path"),
@ApiImplicitParam(name = "pageSize", value = "笔数", required = true, dataType = "int", paramType = "path"),
@ApiImplicitParam(name = "tbSysUserJson", value = "管理员对象 JSON 字符串", required = false, dataTypeClass = String.class, paramType = "json")
})
@RequestMapping(value = "page/{pageNum}/{pageSize}", method = RequestMethod.GET)
public BaseResult page(
@PathVariable(required = true) int pageNum,
@PathVariable(required = true) int pageSize,
@RequestParam(required = false) String tbSysUserJson
) throws Exception {

TbSysUser tbSysUser = null;
if (tbSysUserJson != null) {
tbSysUser = MapperUtils.json2pojo(tbSysUserJson, TbSysUser.class);
}
PageInfo pageInfo = adminService.page(pageNum, pageSize, tbSysUser);

// 分页后的结果集
List<TbSysUser> list = pageInfo.getList();

// 封装 Cursor 对象
BaseResult.Cursor cursor = new BaseResult.Cursor();
cursor.setTotal(new Long(pageInfo.getTotal()).intValue());
cursor.setOffset(pageInfo.getPageNum());
cursor.setLimit(pageInfo.getPageSize());

return BaseResult.ok(list, cursor);
}

Swagger 注解说明

Swagger 通过注解表明该接口会生成文档,包括接口名、请求方法、参数、返回信息的等等。

  • @Api:修饰整个类,描述 Controller 的作用
  • @ApiOperation:描述一个类的一个方法,或者说一个接口
  • @ApiParam:单个参数描述
  • @ApiModel:用对象来接收参数
  • @ApiProperty:用对象接收参数时,描述对象的一个字段
  • @ApiResponse:HTTP 响应其中 1 个描述
  • @ApiResponses:HTTP 响应整体描述
  • @ApiIgnore:使用该注解忽略这个API
  • @ApiError:发生错误返回的信息
  • @ApiImplicitParam:一个请求参数
  • @ApiImplicitParams:多个请求参数

注意:@ApiImplicitParam的参数说明如下

paramType:指定参数放在哪个地方 header:请求参数放置于 Request Header,使用 @RequestHeader 获取;query:请求参数放置于请求地址,使用 @RequestParam 获取;path(用于restful接口):请求参数的获取 @PathVariable;body:请求参数的获取 @RequestBody(代码中接收注解);form:(不常用);
name:参数名
dataType:参数类型
required:参数是否必须传 true 或者 false
value:说明参数的意思
defaultValue:参数的默认值

访问 Swagger2

访问地址:http://ip:port/swagger-ui.html
1

详细案例

POJO 的写法

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package com.zhongying.api.model.base;

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

/**
* 医生对象模型
*/
@Data
@ApiModel(value="医生对象模型")
public class DemoDoctor{
@ApiModelProperty(value="id" ,required=true)
private Integer id;
@ApiModelProperty(value="医生姓名" ,required=true)
private String name;
}

Controller 的写法

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package com.zhongying.api.controller.app;

import java.util.ArrayList;
import java.util.List;

import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

import com.github.pagehelper.PageInfo;
import com.zhongying.api.exception.HttpStatus401Exception;
import com.zhongying.api.model.base.DemoDoctor;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiImplicitParams;
import io.swagger.annotations.ApiOperation;

/**
* 医生类(模拟)
*/
@RequestMapping("/api/v1")
@Controller
@Api(value = "DoctorTestController-医生信息接口模拟")
public class DoctorTestController {
/**
* 添加医生
*
* 在使用对象封装参数进行传参时,需要在该对象添加注解,将其注册到 swagger 中
* @link com.zhongying.api.model.base.DemoDoctor
*
* 注意: 在后台采用对象接收参数时,Swagger自带的工具采用的是JSON传参,
* 测试时需要在参数上加入@RequestBody,正常运行采用form或URL提交时候请删除。
*
* @param doctor 医生类对象
* @return
* @throws Exception
*/
@ResponseBody
@RequestMapping(value="/doctor", method= RequestMethod.POST )
@ApiOperation(value="添加医生信息", notes="")
public String addDoctor(@RequestBody DemoDoctor doctor) throws Exception{
if(null == doctor || doctor.getId() == null){
throw new HttpStatus401Exception("添加医生失败","DT3388","未知原因","请联系管理员");
}
try {
System.out.println("成功----------->"+doctor.getName());
} catch (Exception e) {
throw new HttpStatus401Exception("添加医生失败","DT3388","未知原因","请联系管理员");
}

return doctor.getId().toString();
}

/**
* 删除医生
* @param doctorId 医生ID
* @return
*/
@ResponseBody
@RequestMapping(value="/doctor/{doctorId}", method= RequestMethod.DELETE )
@ApiOperation(value="删除医生信息", notes="")
@ApiImplicitParam(paramType="query", name = "doctorId", value = "医生ID", required = true, dataType = "Integer")
public String deleteDoctor(@RequestParam Integer doctorId){
if(doctorId > 2){
return "删除失败";
}
return "删除成功";
}

/**
* 修改医生信息
* @param doctorId 医生ID
* @param doctor 医生信息
* @return
* @throws HttpStatus401Exception
*/
@ResponseBody
@RequestMapping(value="/doctor/{doctorId}", method= RequestMethod.POST )
@ApiOperation(value="修改医生信息", notes="")
@ApiImplicitParam(paramType="query", name = "doctorId", value = "医生ID", required = true, dataType = "Integer")
public String updateDoctor(@RequestParam Integer doctorId, @RequestBody DemoDoctor doctor) throws HttpStatus401Exception{
if(null == doctorId || null == doctor){
throw new HttpStatus401Exception("修改医生信息失败","DT3391","id不能为空","请修改");
}
if(doctorId > 5 ){
throw new HttpStatus401Exception("医生不存在","DT3392","错误的ID","请更换ID");
}
System.out.println(doctorId);
System.out.println(doctor);
return "修改成功";
}

/**
* 获取医生详细信息
* @param doctorId 医生ID
* @return
* @throws HttpStatus401Exception
*/
@ResponseBody
@RequestMapping(value="/doctor/{doctorId}", method= RequestMethod.GET )
@ApiOperation(value="获取医生详细信息", notes="仅返回姓名..")
@ApiImplicitParam(paramType="query", name = "doctorId", value = "医生ID", required = true, dataType = "Integer")
public DemoDoctor getDoctorDetail(@RequestParam Integer doctorId) throws HttpStatus401Exception{
System.out.println(doctorId);
if(null == doctorId){
throw new HttpStatus401Exception("查看医生信息失败","DT3390","未知原因","请联系管理员");
}
if(doctorId > 3){
throw new HttpStatus401Exception("医生不存在","DT3392","错误的ID","请更换ID");
}
DemoDoctor doctor = new DemoDoctor();
doctor.setId(1);
doctor.setName("测试员");
return doctor;
}

/**
* 获取医生列表
* @param pageIndex 当前页数
* @param pageSize 每页记录数
* @param request
* @return
* @throws HttpStatus401Exception
*/
@ResponseBody
@RequestMapping(value="/doctor", method= RequestMethod.GET )
@ApiOperation(value="获取医生列表", notes="目前一次全部取,不分页")
@ApiImplicitParams({
@ApiImplicitParam(paramType="header", name = "token", value = "token", required = true, dataType = "String"),
@ApiImplicitParam(paramType="query", name = "pageIndex", value = "当前页数", required = false, dataType = "String"),
@ApiImplicitParam(paramType="query", name = "pageSize", value = "每页记录数", required = true, dataType = "String"),
})
public PageInfo<DemoDoctor> getDoctorList(@RequestParam(value = "pageIndex", required = false, defaultValue = "1") Integer pageIndex,
@RequestParam(value = "pageSize", required = false) Integer pageSize,
HttpServletRequest request) throws HttpStatus401Exception{

String token = request.getHeader("token");
if(null == token){
throw new HttpStatus401Exception("没有权限","SS8888","没有权限","请查看操作文档");
}
if(null == pageSize){
throw new HttpStatus401Exception("每页记录数不粗安在","DT3399","不存在pageSize","请查看操作文档");
}

DemoDoctor doctor1 = new DemoDoctor();
doctor1.setId(1);
doctor1.setName("测试员1");
DemoDoctor doctor2 = new DemoDoctor();
doctor2.setId(2);
doctor2.setName("测试员2");

List<DemoDoctor> doctorList = new ArrayList<DemoDoctor>();
doctorList.add(doctor1);
doctorList.add(doctor2);
return new PageInfo<DemoDoctor>(doctorList);
}
}

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