A Gson लाइब्रेरी GsonBuilder के साथ एक कस्टम डी-सीरियलाइज़र पंजीकृत करके कस्टम डी-सीरियलाइज़र निर्दिष्ट करने का एक तरीका प्रदान करती है अगर हमें java ऑब्जेक्ट को JSON में बदलने के लिए . किसी तरीके की आवश्यकता है . हम deserialize() . को ओवरराइड करके एक कस्टम डी-सीरियलाइज़र बना सकते हैं com.google.gson.JsonDeserialize . की विधि आर कक्षा।
नीचे दिए गए उदाहरण में, कस्टम डी-सीरियलाइज़ेशन . का कार्यान्वयन JSON का।
उदाहरण
import java.lang.reflect.Type; import com.google.gson.*; public class CustomJSONDeSerializerTest { public static void main(String[] args) { Gson gson = new GsonBuilder().registerTypeAdapter(Password.class, new PasswordDeserializer()).setPrettyPrinting().create(); String jsonStr = "{" + "\"firstName\": \"Adithya\"," + "\"lastName\": \"Sai\"," + "\"age\": 25," + "\"address\": \"Pune\"," + "\"password\": \"admin@123\"" + "}"; Student student = gson.fromJson(jsonStr, Student.class); System.out.println(student.getPassword().getPassword()); } } class PasswordDeserializer implements JsonDeserializer { @Override public Password deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException { String ecryptedPwd = json.getAsString(); return new Password(new StringBuffer(ecryptedPwd).toString()); } } // Student class class Student { private String firstName; private String lastName; private int age; private String address; private Password password; public Student(String firstName, String lastName, int age, String address) { super(); this.firstName = firstName; this.lastName = lastName; this.age = age; this.address = address; } 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; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public Password getPassword() { return password; } public void setPassword(Password password) { this.password = password; } public String toString() { return "Student[ " + "firstName = " + firstName + ", lastName = " + lastName + ", age = " + age + ", address = " + address + " ]"; } } // Password class class Password { private String password; public Password(String password) { super(); this.password = password; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } }
आउटपुट
admin@123