swagger JSON文件的空值

我通过Java注释生成的JSON swagger文档遇到了一些麻烦(REST使用Jersey公开,序列化由jackson处理).查看生成的swagger,它包含空值,这会导致swagger UI崩溃(生成的YAML没有此问题).

这里是JSON的摘录:

{
  "swagger": "2.0",
  "info": { "description": null, "version": "1.0.0", "title": "", "termsOfService": null, "contact": null, "license": null },
  "host": "localhost:8080",
  "basePath": "/api",
  "tags": [ { "name": "dataset", "description": null, "externalDocs": null } ],
  "schemes": [ "http" ],
  "consumes": null,
  "produces": null,
  "paths": {
    "/dataset": {
      "get": {
        "tags": ["dataset"],
        "summary": "A dataset",
        "description": "All the available datasets",
        "operationId": "datasetGet",
        "schemes": null,
        "consumes": null,
        "produces": ["application/json"],
        "parameters": [],
        "responses": {
          "200": {
            "description": "Available datasets",
            "schema": {
              "type": "object",
              "format": null,
              "example": null,
              "xml": null,
              "position": null,
              "description": null,
              "title": null,
              "readOnly": null,
              "additionalProperties": {
                "type": "object",
                "format": null,
                "example": null,
                "xml": null,
                "position": null,
                "description": null,
                "title": null,
                "readOnly": null,
                "additionalProperties": {
                  "type": "object",
                  "format": null,
                  "example": null,
                  "xml": null,
                  "position": null,
                  "description": null,
                  "title": null,
                  "readOnly": null,
                  "properties": null
                }
              }
            },
            "examples": null,
            "headers": null
          }
        },
        "security": null,
        "externalDocs": null,
        "deprecated": null
      },
      "head": null,
      "post": null,
      "put": null,
      "delete": null,
      "options": null,
      "patch": null,
      "parameters": null
    }
  },
  "parameters": null,
  "responses": null,
  "externalDocs": null,
  "securityRequirement": null
}

    MyProject

    
    
        jersey
        org.glassfish.jersey.servlet.ServletContainer
        
        jersey.config.server.provider.classnames
        
            io.swagger.jersey.listing.ApiListingResourceJSON,
            org.something.DatasetApi
        
        
        1
    

    
        jersey
        /service/*
    

    
    
        DefaultJaxrsConfig
        io.swagger.jaxrs.config.DefaultJaxrsConfig
        
            api.version
            1.0.0
        
        
            swagger.api.basepath
            http://localhost:8080/api
        
        2
    

    
    
        ApiOriginFilter
        org.something.ApiOriginFilter
    
    
        ApiOriginFilter
        /*
    

    org.something
    my_project
    0.0.1-SNAPSHOT

    4.0.0
    war
    My Project
    http://maven.apache.org

    MyProject

    
        1.6
        1.6
        UTF-8
    

    

        
            ch.qos.logback
            logback-classic
            1.0.13
        
        
            junit
            junit
            4.8.1
            test
        

        
            org.glassfish.jersey.containers
            
            jersey-container-servlet
            2.6
        
        
        
            org.glassfish.jersey.core
            jersey-client
            2.6
        

        
            javax.servlet
            javax.servlet-api
            3.1.0
            
        

        
            com.fasterxml.jackson.jaxrs
            jackson-jaxrs-json-provider
            2.4.2
        

        
            io.swagger
            swagger-jersey2-jaxrs
            1.5.4
        

    

package org.something;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiResponse;
import io.swagger.annotations.ApiResponses;

import java.util.Map;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Response;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Path("/dataset")
@Produces({ "application/json" })
@Api(value = "/dataset", description = "the dataset API")
public class DatasetApi  {

    private static final Logger log = LoggerFactory.getLogger(DatasetApi.class);

    @GET
    @ApiOperation(value = "All the available datasets.", notes = "Available datasets", response = Map.class, responseContainer = "Map")
    @ApiResponses(value = { @ApiResponse(code = 200, message = "Map of the available datasets", response = Map.class, responseContainer = "Map") })
    public Map datasetGet() {
        try {
            log.info("Returning list of dataset");
            return Storage.datasets().getDatasets();
        } catch(Exception e) {
            log.info("Exception!", e);
            throw new WebJsonException(e, Response.Status.INTERNAL_SERVER_ERROR);
        }
    }

}

    jersey
    org.glassfish.jersey.servlet.ServletContainer
    
    jersey.config.server.provider.classnames
    
        io.swagger.jersey.listing.ApiListingResourceJSON,
        io.swagger.jaxrs.listing.SwaggerSerializers,
        org.something.DatasetApi
    
    
    1