a gson is a library that can be used to parse java objects to json and vice-versa. it can also be used to convert a json string to an equivalent java object. in order to parse java object to json or json to java object, we need to import com.google.gson package in the java program.
we can get all the keys of a json object in the below example
exampleimport java.util.*;import com.google.gson.*;import org.json.*;public class getjsonallkeystest { public static void main(string[] args) { string jsonstr = "{\"raja\":\"java\", \"ravi\":\"sap\", \"chaitanya\":\"python\", \"adithya\":\"spark\"}"; jsonparser parser = new jsonparser(); jsonelement element = parser.parse(jsonstr); jsonobject obj = element.getasjsonobject(); set<map.entry<string, jsonelement>> entries = obj.entryset(); for(map.entry<string, jsonelement> entry: entries) { system.out.println(entry.getkey()); } }}
输出rajaravichaitanyaadithya
以上就是在java中使用gson如何获取json对象的所有键？的详细内容。