使用javascript解析嵌套的json

Question

我尝试解析从url响应中检索到的以下json。但是我得到了getJSONObject（）的错误。解析这个json的任何帮助都表示赞赏。

{
    "results": {
        "5": {
            "files": [
                "http://localhost:8080/files/31_data_cite.png",
                "http://localhost:8080/files/32_sesardm.png"
            ],
            "details": "TEST1",
            "type": "request",
            "date": "2015-10-24 13:02:45.000",
            "user": "abc@yahoo.com"
        },
        "7": {
            "files": [
                "http://localhost:8080/files/31_data_cite.png",
                "http://localhost:8080/files/32_sesardm.png",
                "http://localhost:8080/files/30_mds-db.png"
            ],
            "details": "TEST2",
            "type": "userexperience",
            "date": "2015-10-24 13:07:32.000",
            "user": "s@yhoo.com"
        }
    }
}



    if (xhr.readyState == 4) {
    			if (xhr.status == 200) {
    				var  arr= JSON.parse(xhr.responseText);
    				//var str = JSON.stringify(xhr.responseText, null, 2);
                  	//alert(str);
    				var obj = $.parseJSON(xhr.responseText);

 for (var key in obj.results) {
		            var values = obj.results[key];
		            
		            for (var v in values) { //v - files, details
		            	
		            	if(v=="files")
		            	{
		            		var files = values.files;
		            		for (i = 0; i < files.length; i++) { 
		            			document.write(" "+ files[i]);
		            		}
		            	}
		            	 document.write( " "+values.details+" "+values.type+" "values.user +"<br>");

		            }
		           
		         
		        }
    }

Answer 1

var obj = JSON.parse(xhr.responseText);
            // var str = JSON.stringify(xhr.responseText, null, 2);
            for ( var key in obj.results) {
                document.write("Key: " + key + "<br>");
                var values = obj.results[key];
                if (typeof values === 'object') {
                    for (var i = 0; i < values.files.length; i++){
                        document.write("FILES: " + values.files[i]
                                + "<br>");
                    }
                }
                document.write("DATA: " + values.details + " "
                        + values.type + " " + values.user + "<br>");
            }