I am currently attempting to read and parse a JSON link using Java in order to utilize it for various purposes. However, I am encountering errors that are leaving me uncertain on how to proceed. Below is the snippet of code I am working with:
package weather.data;
import weather.data;
import com.fasterxml.jackson.core.JsonParseException;
//import com.fasterxml.jackson.annotation.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.JsonMappingException;
import java.io.File;
import java.net.URI;
import java.io.IOException;
public class usertest {
public static void main() throws JsonParseException, JsonMappingException, IOException
{
URI jsonUrl = new URI("https://gist.githubusercontent.com/anonymous/4b32c7ef1ceb5dd48bf5/raw/ef1987551faa3fb61473bb0e7aad70a228dc36d6/gistfile1.txt");
ObjectMapper mapper = new ObjectMapper();
City = mapper.readValue(jsonUrl, data.class);
}
}
There are several errors occurring: Regarding import weather.data:Multiple markers at this line - Only a type can be imported. weather.data resolves to a package - The import weather.data is never used
Concerning City = mapper.readValue(jsonUrl, data.class):Multiple markers at this line - data cannot be resolved to a type - City cannot be resolved to a variable - The method readValue(JsonParser, Class) in the type ObjectMapper is not applicable for the arguments (URI, Class) - The method readValue(JsonParser, Class) in the type ObjectMapper is not applicable for the arguments (URI, Class) - City cannot be resolved to a variable - data cannot be resolved to a type
Any insights or suggestions? Additionally, I am struggling to grasp the concept of using mapper.readValue. Would anyone be able to provide assistance?
Note: I have utilized json gen to generate the data objects within the link, resulting in object data Java files: City, Coord, List1, Temp, and Weather with specific contents.
As an illustration, here is a sample content of City.java:
package weather.data;
import java.util.List;
public class City{
private Coord coord;
private String country;
private Number id;
private String name;
private Number population;
public Coord getCoord(){
return this.coord;
}
public void setCoord(Coord coord){
this.coord = coord;
}
public String getCountry(){
return this.country;
}
public void setCountry(String country){
this.country = country;
}
public Number getId(){
return this.id;
}
public void setId(Number id){
this.id = id;
}
public String getName(){
return this.name;
}
public void setName(String name){
this.name = name;
}
public Number getPopulation(){
return this.population;
}
public void setPopulation(Number population){
this.population = population;
}
}
Thank you for any assistance provided in advance.