[Spring] RestTemplate utf8 json 예제

Spring RestTemplate을 사용하는 예제이다. 

API 서버와 json 통신(utf)을 하는 예제로서, 결과 값을 List<Object>로 변환하는 예제이다. 

한글 정보를 잘 받기 위해 StringHttpMessageConverter 을 잘 활용한다. 한글 깨짐없이 문제 없이 동작한다. 

https://gist.github.com/knight1128/b0e545a03e2d066da8f6#file-resttemplateintegrationtest

package com.google.locationlab;

import com.google.common.collect.Lists;
import com.google.locationlab.model.LocationResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.junit.Test;
import org.springframework.core.ParameterizedTypeReference;
import org.springframework.http.*;

import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.util.UriComponentsBuilder;

import java.net.URI;
import java.nio.charset.Charset;
import java.util.List;

public class RestTemplateIntegrationTest {
    private Log logger = LogFactory.getLog(RestTemplateIntegrationTest.class);

    @Test
    public void test() throws Exception {
        RestTemplate restTemplate = new RestTemplate();

        MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
        HttpMessageConverter stringHttpMessageConverter = new StringHttpMessageConverter(Charset.forName("UTF-8"));

        List<HttpMessageConverter<?>> httpMessageConverter = Lists.newArrayList();
        httpMessageConverter.add(mappingJackson2HttpMessageConverter);
        httpMessageConverter.add(stringHttpMessageConverter);
        restTemplate.setMessageConverters(httpMessageConverter);

        URI targetUrl= UriComponentsBuilder.fromUriString("http://location-api.google.com")
                .path("search")
                .queryParam("text", "잠실역")
                .build()
                .toUri();

        HttpHeaders headers = new HttpHeaders();
        Charset utf8 = Charset.forName("UTF-8");
        MediaType mediaType = new MediaType("application", "json", utf8);
        headers.setContentType(mediaType);

        HttpEntity<String> entity = new HttpEntity<String>("parameters", headers);

        ParameterizedTypeReference<List<LocationResponse>> responseType = new ParameterizedTypeReference<List<LocationResponse>>() { };
        ResponseEntity<List<LocationResponse>> responseEntity = restTemplate.exchange(targetUrl.toURL().toString(), HttpMethod.GET, entity, responseType);
        List<LocationResponse> result = responseEntity.getBody();

        logger.info(result);
      
    }
}