如何在Java中使用Gson实施自定义FieldNamingStrategy？
该FieldNamingStrategy 是在GSON提供自定义字段命名的机制。这允许客户端代码将字段名称转换为常规Java字段声明规则不支持的特定约定。该translateName()方法将前缀字符串“每个字段名pre_”。
在下面的示例中，我们可以实现CustomFieldNamingStrategy。
示例
import java.lang.reflect.Field;
import com.google.gson.*;
public class GsonFieldNamingStrategyTest {
public static void main(String[] args) {
Employee emp = new Employee();
emp.setEmpId(115);
emp.setFirstName("Adithya");
emp.setLastName("Jai");
CustomFieldNamingStrategy customFieldNamingStrategy = new CustomFieldNamingStrategy();
GsonBuilder gsonBuilder = new GsonBuilder();
Gson gson = gsonBuilder.setFieldNamingStrategy(customFieldNamingStrategy).create();
String result = gson.toJson(emp);
System.out.println(result);
} // Custom FieldNamingStrategy
private static class CustomFieldNamingStrategy implements FieldNamingStrategy {
@Override
public String translateName(Field field) {
return "pre_" + field.getName();
}
}
}
//员工阶层
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;
}
}输出结果
{"pre_empId":115,"pre_firstName":"Adithya","pre_lastName":"Jai"}