如何将字符串解析为R中的层次结构或树

install.packages("jsonlite")

{
  "name": "John",
  "age": 30,
  "city": "New York"
}

library(jsonlite)

json_string <- '{"name": "John", "age": 30, "city": "New York"}'
parsed_data <- fromJSON(json_string)

print(parsed_data)

install.packages("XML")

<person>
  <name>John</name>
  <age>30</age>
  <city>New York</city>
</person>

library(XML)

xml_string <- '<person><name>John</name><age>30</age><city>New York</city></person>'
parsed_data <- xmlParse(xml_string)

print(parsed_data)