怎么用r语言获取商品评论啊
library(RCurl)
getcoments <- function(i){
productid <- '2967929' #商品id
t1 <- 'http://club.jd.com/comment/productPageComments.action?productId='
t2 <- '&score=0&sortType=1&page=' #按时间顺序
t3 <- '&pageSize=1' #设置每页1条评论
url <-paste0(t1,productid,t2,i,t3)
web <- getURL(url, .encoding = 'gbk')
comments <- substr(web,regexpr("comments", web)+10,regexpr("referenceTime", web)-4)
content <- substr(comments,regexpr("content", comments)+10,regexpr("creationTime", comments)-4)
}
comment <- c()
n <- 30 #爬取评论条数
for(i in 0:(n-1)){
comment <- rbind(comment,getcoments(i))
print(i+1)
Sys.sleep(1)
}
write.csv(comment,'jingdongcomment.csv')
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