• Szerző: Sallai András
• Copyright © 2025, Sallai András
• Szerkesztve: 2025
• Licenc: CC BY-SA 4.0
• Web: https://szit.hu

A Moshi egy Java programozói könyvtár JSON tartalmak kezelésére.

• https://github.com/square/moshi

<dependency>
    <groupId>com.squareup.moshi</groupId>
    <artifactId>moshi</artifactId>
    <version>1.15.2</version>
</dependency>

Employee.java

package com.example;
 
public class Employee {
  private int id;
  private String name;
  private String city;
  private double salary;
  private String birth;
 
  public Employee() {}
 
  public Employee(int id, String name, String city, double salary, String birth) {
    this.id = id;
    this.name = name;
    this.city = city;
    this.salary = salary;
    this.birth = birth;
  }
 
  public Employee(String name, String city, double salary, String birth) {
    this.name = name;
    this.city = city;
    this.salary = salary;
    this.birth = birth;
  }
 
  public int getId() {
    return id;
  }
 
  public void setId(int id) {
    this.id = id;
  }
 
  public String getName() {
    return name;
  }
 
  public void setName(String name) {
    this.name = name;
  }
 
  public String getCity() {
    return city;
  }
 
  public void setCity(String city) {
    this.city = city;
  }
 
  public double getSalary() {
    return salary;
  }
 
  public void setSalary(double salary) {
    this.salary = salary;
  }
 
  public String getBirth() {
    return birth;
  }
 
  public void setBirth(String birth) {
    this.birth = birth;
  }
 
 
}

Ha van module-info.java fájl:

module-info.java

module com.example {
    requires javafx.controls;
    requires javafx.fxml;
    requires transitive javafx.graphics;
    requires com.squareup.moshi;
 
    opens com.example to javafx.fxml, com.squareup.moshi;
 
    exports com.example;
}

MainController.java

import com.squareup.moshi.JsonAdapter;
import com.squareup.moshi.Moshi;
 
//...
 
 
Employee[] employeeArray = employeeList.toArray(new Employee[employeeList.size()]);
 
Moshi moshi = new Moshi.Builder().build();
 
JsonAdapter<Employee[]> jsonAdapter = moshi.adapter(Employee[].class).indent("  ");
 
String json = jsonAdapter.toJson(employeeArray);

MainController.java

Employee[] employees2 = jsonAdapter.fromJson(json);
ArrayList<Employee> employeeList = new ArrayList<>(Arrays.asList(employees2));
 
System.out.println(employeeList.get(0).getName());

LocalDateJsonAdapter

package com.example;
 
import com.squareup.moshi.FromJson;
import com.squareup.moshi.ToJson;
 
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
 
public class LocalDateJsonAdapter {
 
    private static final DateTimeFormatter FORMATTER = DateTimeFormatter.ISO_LOCAL_DATE;
 
    @ToJson
    String toJson(LocalDate date) {
        return date.format(FORMATTER); 
    }
 
    @FromJson
    LocalDate fromJson(String date) {
        return LocalDate.parse(date, FORMATTER); 
    }
 
}

Használat:

Moshi moshi = new Moshi.Builder()
    .add(new LocalDateJsonAdapter())
    .build();
 
JsonAdapter<Employee[]> jsonAdapter = moshi.adapter(Employee[].class).indent("  ");