How to translate FieldNamingPolicy enum into Chinese using Gson library in Java?

The Gson library provides naming conventions as part of the enum . We can set the field naming strategy using the method of the class.

FieldNamingPolicy enumeration constant

• IDENTITY - With this naming policy, the field name does not change.
• LOWER_CASE_WITH_DASHES - Use this naming strategy to modify Java field names from camelCase to lowercase field names with a dash (-) between each word.
• LOWER_CASE_WITH_UNDERSCORES - Use this naming strategy to modify Java field names from camelCase to lowercase field names, with each word separated by an underscore (_).
• UPPER_CAMEL_CASE - Use this naming strategy to ensure that the first letter of Java field names is capitalized when serialized into their JSON form.
• UPPER_CAMEL_CASE_WITH_SPACES - Use this naming strategy to ensure that when Java field names are serialized into their JSON form, the first letter is capitalized and words are separated by spaces.

Syntax

public enum FieldNamingPolicy extends Enum<FieldNamingPolicy> implements FieldNamingStrategy

Example

import com.google.gson.FieldNamingPolicy;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
public class GsonFieldNamingPolicyTest {
   public static void main(String[] args) {
      Employee emp = new Employee();
      emp.setEmpId(115);
      emp.setFirstName("Raja");
      emp.setLastName("Ramesh");
      GsonBuilder gsonBuilder = new GsonBuilder();
      Gson gson1  =  gsonBuilder.setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_DASHES).create();
      String result1 = gson1.toJson(emp);
      System.out.println("LOWER_CASE_WITH_DASHES: " + result1);
      Gson gson2 =  gsonBuilder.setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES).create();
      String result2 = gson2.toJson(emp);
      System.out.println("LOWER_CASE_WITH_UNDERSCORES: " + result2);
      Gson gson3 = gsonBuilder.setFieldNamingPolicy(FieldNamingPolicy.UPPER_CAMEL_CASE).create();
      String result3 = gson3.toJson(emp);
      System.out.println("UPPER_CAMEL_CASE: " + result3);
      Gson gson4 = gsonBuilder.setFieldNamingPolicy(FieldNamingPolicy.UPPER_CAMEL_CASE_WITH_SPACES).create();
      String result4 = gson4.toJson(emp);
      System.out.println("UPPER_CAMEL_CASE_WITH_SPACES: " + result4);
      Gson gson5 = gsonBuilder.setFieldNamingPolicy(FieldNamingPolicy.IDENTITY).create();
      String result5 = gson5.toJson(emp);
      System.out.println("IDENTITY: " + result5);
   }
}
// Employee class
class Employee {
   private int empId;
   private String firstName;
   private String lastName;
   public int getEmpId() {
      return empId;
   }
   public void setEmpId(int empId) {
      this.empId = empId;
   }
   public String getFirstName() {
      return firstName;
   }
   public void setFirstName(String firstName) {
      this.firstName = firstName;
   }
   public String getLastName() {
      return lastName;
   }
   public void setLastName(String lastName) {
      this.lastName = lastName;
   }
}

Output

LOWER_CASE_WITH_DASHES: {"emp-id":115,"first-name":"Raja","last-name":"Ramesh"}
LOWER_CASE_WITH_UNDERSCORES: {"emp_id":115,"first_name":"Raja","last_name":"Ramesh"}
UPPER_CAMEL_CASE: {"EmpId":115,"FirstName":"Raja","LastName":"Ramesh"}
UPPER_CAMEL_CASE_WITH_SPACES: {"Emp Id":115,"First Name":"Raja","Last Name":"Ramesh"}
IDENTITY: {"empId":115,"firstName":"Raja","lastName":"Ramesh"}

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