使用 GSON 从文件中读取 JSON

Question

I try to simply read the json file, followed by the creation of the class object, but it does not work, BufferedReader does not even read the file, although in the examples it is directly passed to GSON, the dependency is added to the pom file.

json

{
  "student": [{
    "name": "Mark",
    "surname": "Ivanov",
    }, {
     
     "name": "Peter",
    "surname": "Ivanov",
  }]
}

Created classes

public class POJOStudents
{
     String name;
     String surname;
    
}

public class GeneralStudents {
    List<POJOStudents> student;

}


import java.io.BufferedReader;
import java.io.FileReader;
import com.google.gson.Gson;

    public class Main
    {
        public static void main(String[] args) throws Exception
        {
    
            Gson gson = new Gson();
            BufferedReader br = new BufferedReader(new FileReader("D:\\student.json"));
            GeneralStudents student = gson.fromJson(br, GeneralStudents.class);
    
        }
    }

Answer 1

As theBittor stated: You have to remove the trailing commas after surname. Then the main can read your json.

By the way your readers should be surrounded by try-finally or use the Autoclose feature of Java with

try (BufferedReader br = new BufferedReader(new FileReader("D:\\student.json"))) {
        GeneralStudents student = gson.fromJson(br, GeneralStudents.class);
}