使用fromJSON读取完整的json文件_Json_R_Yelp_Jsonlite

使用fromJSON读取完整的json文件

json r

使用fromJSON读取完整的json文件,json,r,yelp,jsonlite,Json,R,Yelp,Jsonlite,我试图读入一个大型JSON文件，该文件存储为YelpAPI返回的.txt文件，并将其转换为数据帧。我的JSON文件是漂亮的打印格式，前3个JSON对象如下： { "businesses": [ { "address1": "11301 Wilshire Blvd", "address2": "", "address3": "", "avg_rating": 3.0,

我试图读入一个大型JSON文件，该文件存储为YelpAPI返回的.txt文件，并将其转换为数据帧。我的JSON文件是漂亮的打印格式，前3个JSON对象如下：

{
    "businesses": [
        {
            "address1": "11301 Wilshire Blvd", 
            "address2": "", 
            "address3": "", 
            "avg_rating": 3.0, 
            "categories": [
                {
                    "category_filter": "hospitals", 
                    "name": "Hospitals", 
                    "search_url": "http://www.yelp.com/search?cflt=hospitals&find_desc=&find_loc=11301+Wilshire+Blvd%2C+Los+Angeles+90073"
                }
            ], 
            "city": "Los Angeles", 
            "country": "USA", 
            "country_code": "US", 
            "distance": 0.0, 
            "id": "9yWDlJ5l1i6O36Fxp5JIBw", 
            "is_closed": false, 
            "mobile_url": "http://m.yelp.com/biz/west-los-angeles-medical-center-los-angeles-2", 
            "name": "West Los Angeles Medical Center", 
            "nearby_url": "http://www.yelp.com/search?find_desc=&find_loc=11301+Wilshire+Blvd%2C+Los+Angeles+90073", 
            "neighborhoods": [], 
            "phone": "3104783711", 
            "photo_url": "http://media2.fl.yelpcdn.com/bpthumb/IZ82DgJAy8emp4dX7UvbUw/ms", 
            "photo_url_small": "http://media2.fl.yelpcdn.com/bpthumb/IZ82DgJAy8emp4dX7UvbUw/ss", 
            "rating_img_url": "http://s3-media3.fl.yelpcdn.com/assets/2/www/img/34bc8086841c/ico/stars/v1/stars_3.png", 
            "rating_img_url_small": "http://s3-media3.fl.yelpcdn.com/assets/2/www/img/902abeed0983/ico/stars/v1/stars_small_3.png", 
            "review_count": 40, 
            "reviews": [
                {
                    "date": "2014-11-25", 
                    "id": "wO4jShjiPoWDBR_OV3cGmQ", 
                    "mobile_uri": "/biz/west-los-angeles-medical-center-los-angeles-2?full=True&hrid=wO4jShjiPoWDBR_OV3cGmQ", 
                    "rating": 5, 
                    "rating_img_url": "http://s3-media1.fl.yelpcdn.com/assets/2/www/img/f1def11e4e79/ico/stars/v1/stars_5.png", 
                    "rating_img_url_small": "http://s3-media1.fl.yelpcdn.com/assets/2/www/img/c7623205d5cd/ico/stars/v1/stars_small_5.png", 
                    "text_excerpt": "I dropped my super expensive insurance, that is not feasible to afford now, and joined the VA.  Shortly after signing up it was found that I needed surgery....", 
                    "url": "http://www.yelp.com/biz/west-los-angeles-medical-center-los-angeles-2?hrid=wO4jShjiPoWDBR_OV3cGmQ", 
                    "user_name": "Dj D.", 
                    "user_photo_url": "http://media1.fl.yelpcdn.com/upthumb/s1RKYlrzhKCZs_zSS0cVOA/ms", 
                    "user_photo_url_small": "http://media1.fl.yelpcdn.com/upthumb/s1RKYlrzhKCZs_zSS0cVOA/ss", 
                    "user_url": "http://www.yelp.com/user_details?userid=cJyDfLw9uJT63MwFgz7XnA"
                }
            ], 
            "state": "CA", 
            "state_code": "CA", 
            "url": "http://www.yelp.com/biz/west-los-angeles-medical-center-los-angeles-2", 
            "zip": "90073"
        }, 
        {
            "address1": "11301 Wilshire", 
            "address2": "Bldg 306", 
            "address3": "", 
            "avg_rating": 3.0, 
            "categories": [
                {
                    "category_filter": "cafeteria", 
                    "name": "Cafeteria", 
                    "search_url": "http://www.yelp.com/search?cflt=cafeteria&find_desc=&find_loc=11301+Wilshire%2C+Los+Angeles+90073"
                }
            ], 
            "city": "Los Angeles", 
            "country": "USA", 
            "country_code": "US", 
            "distance": 0.0, 
            "id": "K8eEx2J3pF3b-w6EZwKY5w", 
            "is_closed": false, 
            "mobile_url": "http://m.yelp.com/biz/va-canteen-wla-los-angeles", 
            "name": "VA Canteen WLA", 
            "nearby_url": "http://www.yelp.com/search?find_desc=&find_loc=11301+Wilshire%2C+Los+Angeles+90073", 
            "neighborhoods": [], 
            "phone": "3104783711", 
            "photo_url": "http://s3-media2.fl.yelpcdn.com/assets/srv0/yelp_styleguide/5f69f303f17c/assets/img/default_avatars/business_medium_square.png", 
            "photo_url_small": "http://s3-media3.fl.yelpcdn.com/assets/srv0/yelp_styleguide/6671667140ef/assets/img/default_avatars/business_small_square.png", 
            "rating_img_url": "http://s3-media3.fl.yelpcdn.com/assets/2/www/img/34bc8086841c/ico/stars/v1/stars_3.png", 
            "rating_img_url_small": "http://s3-media3.fl.yelpcdn.com/assets/2/www/img/902abeed0983/ico/stars/v1/stars_small_3.png", 
            "review_count": 4, 
            "reviews": [
                {
                    "date": "2014-11-02", 
                    "id": "rzoQx7o9sla7ig3QZAjtUg", 
                    "mobile_uri": "/biz/va-canteen-wla-los-angeles?full=True&hrid=rzoQx7o9sla7ig3QZAjtUg", 
                    "rating": 3, 
                    "rating_img_url": "http://s3-media3.fl.yelpcdn.com/assets/2/www/img/34bc8086841c/ico/stars/v1/stars_3.png", 
                    "rating_img_url_small": "http://s3-media3.fl.yelpcdn.com/assets/2/www/img/902abeed0983/ico/stars/v1/stars_small_3.png", 
                    "text_excerpt": "This place serves its function. There are a few stations where you can grab food if you don't want to venture off the VA premises for lunch. However, the...", 
                    "url": "http://www.yelp.com/biz/va-canteen-wla-los-angeles?hrid=rzoQx7o9sla7ig3QZAjtUg", 
                    "user_name": "James W.", 
                    "user_photo_url": "http://media1.fl.yelpcdn.com/upthumb/6UlTMXf0VkFmmmXwXe8Flg/ms", 
                    "user_photo_url_small": "http://media1.fl.yelpcdn.com/upthumb/6UlTMXf0VkFmmmXwXe8Flg/ss", 
                    "user_url": "http://www.yelp.com/user_details?userid=qgXcgfdrk5tzmLBq4_h6mQ"
                }
            ], 
            "state": "CA", 
            "state_code": "CA", 
            "url": "http://www.yelp.com/biz/va-canteen-wla-los-angeles", 
            "zip": "90073"
        }, 
        {
            "address1": "11301 Wilshire", 
            "address2": "Bldg 306", 
            "address3": "", 
            "avg_rating": 2.0, 
            "categories": [
                {
                    "category_filter": "cafeteria", 
                    "name": "Cafeteria", 
                    "search_url": "http://www.yelp.com/search?cflt=cafeteria&find_desc=&find_loc=11301+Wilshire%2C+Los+Angeles+90073"
                }
            ], 
            "city": "Los Angeles", 
            "country": "USA", 
            "country_code": "US", 
            "distance": 0.0, 
            "id": "4etl04G_-VwP8NJ2F3nu4w", 
            "is_closed": false, 
            "mobile_url": "http://m.yelp.com/biz/va-canteen-wla-2-los-angeles", 
            "name": "VA Canteen WLA 2", 
            "nearby_url": "http://www.yelp.com/search?find_desc=&find_loc=11301+Wilshire%2C+Los+Angeles+90073", 
            "neighborhoods": [], 
            "phone": "3104783711", 
            "photo_url": "http://s3-media2.fl.yelpcdn.com/assets/srv0/yelp_styleguide/5f69f303f17c/assets/img/default_avatars/business_medium_square.png", 
            "photo_url_small": "http://s3-media3.fl.yelpcdn.com/assets/srv0/yelp_styleguide/6671667140ef/assets/img/default_avatars/business_small_square.png", 
            "rating_img_url": "http://s3-media2.fl.yelpcdn.com/assets/2/www/img/b561c24f8341/ico/stars/v1/stars_2.png", 
            "rating_img_url_small": "http://s3-media2.fl.yelpcdn.com/assets/2/www/img/a6210baec261/ico/stars/v1/stars_small_2.png", 
            "review_count": 1, 
            "reviews": [
                {
                    "date": "2014-02-01", 
                    "id": "G9Qr5OpQHs0qo89LFzYIGA", 
                    "mobile_uri": "/biz/va-canteen-wla-2-los-angeles?full=True&hrid=G9Qr5OpQHs0qo89LFzYIGA", 
                    "rating": 2, 
                    "rating_img_url": "http://s3-media2.fl.yelpcdn.com/assets/2/www/img/b561c24f8341/ico/stars/v1/stars_2.png", 
                    "rating_img_url_small": "http://s3-media2.fl.yelpcdn.com/assets/2/www/img/a6210baec261/ico/stars/v1/stars_small_2.png", 
                    "text_excerpt": "Mon-fri 7am to 1:30 pm\n\nBreakfast and Lunch\n\nThe grill team is good, Grill masters!\n\nCoffee is ok", 
                    "url": "http://www.yelp.com/biz/va-canteen-wla-2-los-angeles?hrid=G9Qr5OpQHs0qo89LFzYIGA", 
                    "user_name": "Patrick D.", 
                    "user_photo_url": "http://media1.fl.yelpcdn.com/upthumb/essl4VxDB599GHCamIdDdA/ms", 
                    "user_photo_url_small": "http://media1.fl.yelpcdn.com/upthumb/essl4VxDB599GHCamIdDdA/ss", 
                    "user_url": "http://www.yelp.com/user_details?userid=B7VkaAqckBslmw5HtstA1A"
                }
            ], 
            "state": "CA", 
            "state_code": "CA", 
            "url": "http://www.yelp.com/biz/va-canteen-wla-2-los-angeles", 
            "zip": "90073"
        }
    ], 
    "message": {
        "code": 0, 
        "text": "OK", 
        "version": "1.1.1"
    }
}
{
    "businesses": [], 
    "message": {
        "code": 0, 
        "text": "OK", 
        "version": "1.1.1"
    }
}
{
    "businesses": [], 
    "message": {
        "code": 0, 
        "text": "OK", 
        "version": "1.1.1"
    }
}

我尝试了以下R代码：

library(dplyr)
library(plyr)
library(jsonlite) 

df <- fromJSON(paste(readLines("Yelp facility pretty print v2.txt"), collapse=""))

但这只返回第一个JSON对象

然后我试着：

df <- fromJSON(sprintf("[%s]", paste(readLines("Yelp facility pretty print v2.txt"), collapse=",")))

但这会返回一个错误…意外字符，；键值应为开头字符串引号

我验证了我的JSON文件中没有空行。非常感谢您的任何建议/帮助

您的问题是JSON格式不正确，如以下答案所示：

您的输入JSON格式不正确，在根级别有多个元素。这类似于定义具有多个根的XML文档，当然这是不允许的

读取文件的正确方法是：

my_data <- rjson::fromJSON(file='./yelp.txt')

但是，由于有多个根元素，它失败了。您可以删除第一个元素之后的所有内容，也可以通过添加到文本文件的顶部和底部，将所有内容包装在一个大的根中，并用逗号分隔每个内容，这样JSON中的每个条目都将是它自己的列表元素

注意：您可以使用jsonlite包，我使用rjson，因为它的默认解析创建了一个更好的列表，但您实际上可以使用任何一个包。这是您的偏好。

来自Yelp的响应看起来不像是有效的JSON对象。JSON中没有有效的方法使序列}{位于带引号的字符串之外。使用sprintf将其转换为数组的尝试将无效，因为它不会在对象之间插入逗号。请停止使用读取行。只需将文件路径传递给fromJSON即可。