关于node koa2和express框架搭建swagger

cnpm install  express-swagger-generator

const expressSwagger = require('express-swagger-generator')(app);
const options = {
  swaggerDefinition: {
    info: {
      description: '管理平台',
      title: 'Swagger',
      version: '1.0.0',
    },
    host: 'localhost:3002',
    basePath: '/',//请求路径头
    produces: [
      "application/json",
      "application/xml"
    ],
    schemes: ['http', 'https'],
    securityDefinitions: {
      JWT: {
        type: 'apiKey',
        in: 'header',
        name: 'Authorization',
        description: "",
      }
    }
  },
  route: {
    url: '/doc',
    docs: '/swagger.json' 
  },
  basedir: __dirname, 
  files: ['./routes/*.js'] 
};
expressSwagger(options);

/**
 * @typedef UserJSON
 * @property {string} username.required  - 请输入用户名 - eg: 1
 * @property {string} password.required - 请输入密码 - eg: 1
 */
/**
 * @typedef Error
 * @property {string} code.required
 */


/**
 * 用户登陆
 * @route POST /users/login   
 * @summary 登陆   
 * @group user - 用户相关API
 * @param {UserJSON.model} body.body.required - username&password
 * @returns {object} 200 - 成功
 * @returns {Error}  default - Unexpected error
 */

npm install koa2-swagger-ui  
npm install swagger-jsdoc

const router = require('koa-router')(); // 引入路由函数
const swaggerJSDoc = require('swagger-jsdoc');
const swaggerDefinition = {
  info: {
    description: '关于API文档',
    version: '1.0.0',
    title: 'Koa2_server Swagger',

  },
  host: 'localhost:4000',
  basePath: '/', // Base path (optional), host/basePath
  schemes: ['http', 'https'],
  securityDefinitions: {
    server_auth: {
      type: 'oauth2',
      description: '登录账号密码鉴权',
      tokenUrl: 'http://localhost:4000/image/oauth',
      flow: 'password',
      scopes: {
        token: 'modify pets in your account'
      }
    },
  }
};
const options = {
  swaggerDefinition,
  // 写有注解的router的存放地址(当你新增swagger时文档里没显示出来的话那么就是这边地址没有加进去)
  apis: ['./routes/*.js'] // routes下所有的js文件
};
const swaggerSpec = swaggerJSDoc(options);
// 通过路由获取生成的注解文件
router.get('/swagger.json', async ctx => {
  ctx.set('Content-Type', 'application/json');
  ctx.body = swaggerSpec;
});

module.exports = router;
// 将页面暴露出去

const swagger = require('./config/swagger') 
const { koaSwagger } = require('./public/swagger-ui')//这个地址是出现问题一后 静态文件放的位置
app.use(swagger.routes(), swagger.allowedMethods())
app.use(
  koaSwagger({
    routePrefix: '/swagger', // 这里配置swagger的访问路径
    swaggerOptions: {
      url: '/swagger.json', // 这里配置swagger的文档配置URL，也就是说，我们展示的API都是通过这个接口生成的。
    },
  }),
);