利用 Fastjson json （簡單粗暴版）

參考博客：https://blog.csdn.net/qq877507054/article/details/51395852

先看json的樣式：含有多個數組。

{
    "status":0,
    "message":"ok",
    "total":134,
    "results":[
        {
            "name":"北京市dnf小學",
            "location":{
                "lat":39.923629,
                "lng":116.388059
            },
            "address":"府右街丙27號",
            "province":"北京市",
            "city":"北京市",
            "area":"西城區",
            "street_id":"8ca69c393be618bfc061e",
            "telephone":"",
            "detail":1,
            "uid":"8ca69c70e393befc061e",
            "detail_info":{
                "tag":"教育培訓;小學",
                "navi_location":{
                    "lng":116.3887231398,
                    "lat":39.92324024956
                },
                "type":"education",
                "detail_url":"",
                "overall_rating":"0.0",
                "children":[
 
                ]
            }
        },
        {
            "name":"dudu小學(遂安伯校區)",
            "location":{
                "lat":39.922193,
                "lng":116.430818
            },
            "address":"金寶街65號",
            "province":"北京市",
            "city":"北京市",
            "area":"東城區",
            "street_id":"9bdab243406c476051",
            "detail":1,
            "uid":"9bda75243406c476051",
            "detail_info":{
                "tag":"教育培訓;小學",
                "navi_location":{
                    "lng":116.431089492,
                    "lat":39.9215554065
                },
                "type":"education",
                "detail_url":"",
                "children":[
 
                ]
            }
        }
]
}

	    	 
	    	//將上面的json 存儲爲  String 類型
	    	 String json = jsonlist.get(a).toString();
	    	 System.out.println("json:" + json);
	    	 
	    	 //將JsonObject數據轉換爲Json
	    	 JSONObject object = JSON.parseObject(json);
	    	 System.out.println(object);
	    
	    	 //獲取 json 當中的 ：results
	    	 Object results = object.get("results");
	    	 System.out.println("results:" + results);
	    	 
	    	 //轉換成數組
	    	 JSONArray array = JSON.parseArray(results.toString());
	    	 //遍歷其中的數據
	    	 for(int b=0;b<array.size();b++){
	    		 System.out.println(array.get(b));
	    		//這行必須寫：必須加上+"";不然會報出類型強轉異常！  
	    		 String str = array.get(b)+"";  
	    		 JSONObject resultsGetJson = JSON.parseObject(str); 
                //name
	    		 String  name = resultsGetJson.get("name").toString();
	    		 System.out.println("name:" + name);
	    		//address
	    		 String  address = resultsGetJson.get("address").toString();
	    		 System.out.println("address:" + address);
	    		//telephone 並不是每個results當中都含有telephone
	    		 String telephone = "" ;
	    		 try {
	    			 telephone =  resultsGetJson.get("telephone").toString();
		    		 System.out.println("telephone:" + telephone);
				} catch (Exception e) {
					// TODO: handle exception
				}
	    		
	    		
	    		 //獲取經緯度信息 
	    		 String  location = resultsGetJson.get("location").toString();
	    		 JSONObject locationJson = JSON.parseObject(location); 
	    		 String locationLat = locationJson.get("lat").toString();
	    		 System.out.println("locationLat:" + locationLat);
	    		 String locationLng = locationJson.get("lng").toString();
	    		 System.out.println("locationLng:" + locationLng);
	    		 
	    		 String  detail_info = resultsGetJson.get("detail_info").toString();
	    		 System.out.println("detail_info:" + detail_info);
	    		 //將JsonObject數據轉換爲Json  
	    		 JSONObject detail_infoJson = JSON.parseObject(detail_info); 
	    		 
	    		 String tag = "" ;  String navi_location = "" ; String messagelng = "" ;  String messagelat = "" ;
	    		 
	    		 try {
	    			 tag = detail_infoJson.get("tag").toString();
		    		 System.out.println("tag:" + tag);
		    		 
		    		navi_location = detail_infoJson.get("navi_location").toString();
		    		 JSONObject navi_locationJson = JSON.parseObject(navi_location);
		    		 
		    		 messagelng = navi_locationJson.get("lng").toString();
		    		 System.out.println("messagelng:" + messagelng);
		    		 messagelat = navi_locationJson.get("lat").toString();
		    		 System.out.println("messagelat:" + messagelat);
				} catch (Exception e) {
					System.err.println("detail_infoJson內部分tag、lng、lat 不存在");
				}
	    		 
	    		 
	    		 
	    	 }