What should be the json format for this json response?

April 12, 2023

Below is the json response retrieved from the api

[
  {"employee":{"id":1,"name":"somu","employee_company":{"id":100,"name":"comp1"}}},
  {"employee":    {"id":2,"name":"raju","employee_company":{"id":101,"name":"comp2"}}},
  {"employee":{"id":3,"name":"nagu","employee_company":{"id":105,"name":"comp5"}}}
]

Not sure how to define the java equivalent structure to consume the above json response


a. List<EmployeeDTO> where EmployeeDTO has Employee object and EmployeeCompany Object (OR)
b. List<Map<String, EmployeeDTO>> where EmployeeDTO has id, name attribute and EmployeeCompany Object

restTemplate.exchange
        (RequestEntity.get(new URI(url)).headers(headers).build(), EmployeeDTO.class);

(or)

`  restTemplate.exchange(
     BASE_URL,
     HttpMethod.GET,
     null,
     new ParameterizedTypeReference<List<EmployeeDTO>>() {}
 );`

1. EmployeeDTO -> Employee + EmployeeCompany
2. Employee + EmployeeCompany (no employee DTO)

Can you please help me with the DTO structure align with the above json and also the rest API call with
response class?

Thanks

>Solution :

For fast convert u can use
https://json2csharp.com/code-converters/json-to-pojo

it offers

// import com.fasterxml.jackson.databind.ObjectMapper; // version 2.11.1
// import com.fasterxml.jackson.annotation.JsonProperty; // version 2.11.1
/* ObjectMapper om = new ObjectMapper();
Root[] root = om.readValue(myJsonString, Root[].class); */
public class Employee{
    public int id;
    public String name;
    public EmployeeCompany employee_company;
}

public class EmployeeCompany{
    public int id;
    public String name;
}

public class Root{
    public Employee employee;
}

Call remote url and get a list

https://www.baeldung.com/spring-rest-template-list

EmployeeList response = restTemplate.getForObject(
  "http://localhost:8080/employees",
  EmployeeList.class);
List<Employee> employees = response.getEmployees();