Use fastjson JSON (simple and rough version)

Reference blog ：https://blog.csdn.net/qq877507054/article/details/51395852

First look at json The style of ： Contains multiple arrays .

{
    "status":0,
    "message":"ok",
    "total":134,
    "results":[
        {
            "name":" The Beijing municipal dnf Primary school ",
            "location":{
                "lat":39.923629,
                "lng":116.388059
            },
            "address":" Fuyou street C 27 Number ",
            "province":" The Beijing municipal ",
            "city":" The Beijing municipal ",
            "area":" Xicheng district ",
            "street_id":"8ca69c393be618bfc061e",
            "telephone":"",
            "detail":1,
            "uid":"8ca69c70e393befc061e",
            "detail_info":{
                "tag":" Education and training ; Primary school ",
                "navi_location":{
                    "lng":116.3887231398,
                    "lat":39.92324024956
                },
                "type":"education",
                "detail_url":"",
                "overall_rating":"0.0",
                "children":[
 
                ]
            }
        },
        {
            "name":"dudu Primary school ( Suianbo campus )",
            "location":{
                "lat":39.922193,
                "lng":116.430818
            },
            "address":" Jinbao Street 65 Number ",
            "province":" The Beijing municipal ",
            "city":" The Beijing municipal ",
            "area":" Dongcheng District ",
            "street_id":"9bdab243406c476051",
            "detail":1,
            "uid":"9bda75243406c476051",
            "detail_info":{
                "tag":" Education and training ; Primary school ",
                "navi_location":{
                    "lng":116.431089492,
                    "lat":39.9215554065
                },
                "type":"education",
                "detail_url":"",
                "children":[
 
                ]
            }
        }
]
}

	    	 
	    	// The above json  Stored as   String  type 
	    	 String json = jsonlist.get(a).toString();
	    	 System.out.println("json:" + json);
	    	 
	    	 // take JsonObject Data to Json
	    	 JSONObject object = JSON.parseObject(json);
	    	 System.out.println(object);
	    
	    	 // obtain  json  In the middle of  ：results
	    	 Object results = object.get("results");
	    	 System.out.println("results:" + results);
	    	 
	    	 // Convert to array 
	    	 JSONArray array = JSON.parseArray(results.toString());
	    	 // Traverse the data 
	    	 for(int b=0;b<array.size();b++){
	    		 System.out.println(array.get(b));
	    		// This line has to write ： Have to add +""; Otherwise, it will report the abnormal type of forced conversion ！  
	    		 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  Not every results It contains telephone
	    		 String telephone = "" ;
	    		 try {
	    			 telephone =  resultsGetJson.get("telephone").toString();
		    		 System.out.println("telephone:" + telephone);
				} catch (Exception e) {
					// TODO: handle exception
				}
	    		
	    		
	    		 // Get longitude and latitude information  
	    		 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);
	    		 // take JsonObject Data to 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 Inner part tag、lng、lat  non-existent ");
				}
	    		 
	    		 
	    		 
	    	 }