将json转为map的两种方式及前后端开发json Api设计规范总结

向右看齐 2021-09-23 10:22 241阅读 0赞

一、使用jackson

String jsonData = "{\"identifier\":\"18111111111\",\"opType\":1,\"platform\":0}";
    		ObjectMapper mapper = new ObjectMapper();
    		try {
    			@SuppressWarnings("unchecked")
    			Map<String, Object> tmpMap=mapper.readValue(jsonData, Map.class);
    			String identifier=(String) tmpMap.get("identifier");
    			String identifier2=(String) tmpMap.get("identifier2");
    			int opType=(Integer) tmpMap.get("opType");
    			int platform=(Integer) tmpMap.get("platform");
    			System.out.println("identifier:"+identifier);
    			System.out.println("identifier2:"+identifier2);
    			System.out.println("opType:"+opType);
    			System.out.println("platform:"+platform);
    		} catch (JsonParseException e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		} catch (JsonMappingException e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		} catch (IOException e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}
    		renderJson(jsonData);

注：[https://blog.csdn.net/an129/article/details/74175665][https_blog.csdn.net_an129_article_details_74175665]

二、使用gson

public class MyType<T> {
    	    public T gsonToMap(String strJson) {
    	        return new Gson().fromJson(strJson, new TypeToken<T>() {
    	        }.getType());
    	    }
    	}
    	
    	public void gson() {
    		String json = "{\"identifier\":\"18111111111\",\"opType\":1,\"platform\":0}";
    		Map<String, Object> tmpMap = new MyType<Map<String, Object>>().gsonToMap(json);
    		String identifier=(String) tmpMap.get("identifier");
    		String identifier2=(String) tmpMap.get("identifier2");
    		double opType=(Double) tmpMap.get("opType");
    		double platform=(Double) tmpMap.get("platform");
    		System.out.println("identifier:"+identifier);
    		System.out.println("identifier2:"+identifier2);
    		System.out.println("opType:"+opType);
    		System.out.println("platform:"+platform);
    
    		renderJson(json);
    	}

注：[https://juejin.im/post/5cbb3c5af265da03ab23258c][https_juejin.im_post_5cbb3c5af265da03ab23258c]

只要是**Number**（包括**int、long、float、double**等）型，都会被强制转化成**double**，至于为什么这么做，因为这里所有的类型都可以转换成**double**，而反过来则不行。

三、前后端开发json Api设计规范总结

注：[https://sobird.me/http-json-api-guide.htm][https_sobird.me_http-json-api-guide.htm]

[http://tutuge.me/2016/05/02/design-json-api-respoense/][http_tutuge.me_2016_05_02_design-json-api-respoense]

[https://crifan.github.io/http\_restful\_api/website/restful\_experience/pagination.html][https_crifan.github.io_http_restful_api_website_restful_experience_pagination.html]

四、json数据参考

{
        "errcode": 0,
        "errmsg": "ok",
        "result": {
            "next_cursor": 2,
            "process_list": [
                {
                    "icon_url": "https://gw.xxxx/T-102-102.png",
                    "name": "物品领用",
                    "process_code": "PROC-YMLA1-xxxx-11WFJ-1",
                    "url": "https://aflow.dingtalk.com/dingtalk/mobile/homepage.htm?xxxx"
                },
                {
                    "icon_url": "https://gw.xxxx/T-102-103.png",
                    "name": "通用审批",
                    "process_code": "PROC-YMLA1-xxxx-11WFJ-2",
                    "url": "https://aflow.dingtalk.com/dingtalk/mobile/homepage.htm?xxxx"
                }
            ]
        },
        "request_id": "72hy9suzb5cg"
    }

[https://developers.dingtalk.com/document/app/you-can-call-this-operation-to-retrieve-a-list-of][https_developers.dingtalk.com_document_app_you-can-call-this-operation-to-retrieve-a-list-of]

{
    "state": "fail"
    }

如果错误返回-1 ，fail

[https_blog.csdn.net_an129_article_details_74175665]: https://blog.csdn.net/an129/article/details/74175665
[https_juejin.im_post_5cbb3c5af265da03ab23258c]: https://juejin.im/post/5cbb3c5af265da03ab23258c
[https_sobird.me_http-json-api-guide.htm]: https://sobird.me/http-json-api-guide.htm
[http_tutuge.me_2016_05_02_design-json-api-respoense]: http://tutuge.me/2016/05/02/design-json-api-respoense/
[https_crifan.github.io_http_restful_api_website_restful_experience_pagination.html]: https://crifan.github.io/http_restful_api/website/restful_experience/pagination.html
[https_developers.dingtalk.com_document_app_you-can-call-this-operation-to-retrieve-a-list-of]: https://developers.dingtalk.com/document/app/you-can-call-this-operation-to-retrieve-a-list-of