Spring Boot 3 - How can I perform client API GET request with request body using RestTemplate?

ExtendedRestTemplate restTemplate = new ExtendedRestTemplate();

​

SomeRequest someRequest = new SomeRequest(1L, "John", "john@email.com");

SomeResponse someResponse = restTemplate.getForObject("http://localhost/api/some-path", someRequest, SomeResponse.class);  // <--- GET method request with body

package com.dirask.example;

​

import java.net.URI;

import java.util.List;

import java.util.Map;

​

import org.springframework.http.HttpMethod;

import org.springframework.http.client.ClientHttpRequestFactory;

import org.springframework.http.converter.HttpMessageConverter;

import org.springframework.lang.Nullable;

import org.springframework.web.client.HttpMessageConverterExtractor;

import org.springframework.web.client.RequestCallback;

import org.springframework.web.client.RestClientException;

import org.springframework.web.client.RestTemplate;

​

public class ExtendedRestTemplate extends RestTemplate {

​

    public ExtendedRestTemplate() {

        super();

    }

​

    public ExtendedRestTemplate(ClientHttpRequestFactory requestFactory) {

        super(requestFactory);

    }

​

    public ExtendedRestTemplate(List<HttpMessageConverter<?>> messageConverters) {

        super(messageConverters);

    }

​

    @Nullable

    public <T> T getForObject(URI url, @Nullable Object requestObject, Class<T> responseType) throws RestClientException {

        List<HttpMessageConverter<?>> messageConverters = super.getMessageConverters();

        RequestCallback requestCallback = super.httpEntityCallback(requestObject, responseType);

        HttpMessageConverterExtractor<T> responseExtractor = new HttpMessageConverterExtractor<>(responseType, messageConverters);

        return super.execute(url, HttpMethod.GET, requestCallback, responseExtractor);

    }

​

    @Nullable

    public <T> T getForObject(String url, @Nullable Object requestObject, Class<T> responseType, Object... uriVariables) throws RestClientException {

        List<HttpMessageConverter<?>> messageConverters = super.getMessageConverters();

        RequestCallback requestCallback = httpEntityCallback(requestObject, responseType);

        HttpMessageConverterExtractor<T> responseExtractor = new HttpMessageConverterExtractor<>(responseType, messageConverters);

        return super.execute(url, HttpMethod.GET, requestCallback, responseExtractor, uriVariables);

    }

​

    @Nullable

    public <T> T getForObject(String url, @Nullable Object requestObject, Class<T> responseType, Map<String, ?> uriVariables) throws RestClientException {

        List<HttpMessageConverter<?>> messageConverters = super.getMessageConverters();

        RequestCallback requestCallback = super.httpEntityCallback(requestObject, responseType);

        HttpMessageConverterExtractor<T> responseExtractor = new HttpMessageConverterExtractor<>(responseType, messageConverters);

        return super.execute(url, HttpMethod.GET, requestCallback, responseExtractor, uriVariables);

    }

}