远程调用-002、restTemplate的Get请求带JSON参数

1、application.properties

test.url=http://localhost:8080/api/test/get

2、创建HttpComponentsClientRestfulHttpRequestFactory类

package com.liws.test.utils;

import org.apache.http.client.methods.HttpEntityEnclosingRequestBase;
import org.apache.http.client.methods.HttpUriRequest;
import org.springframework.http.HttpMethod;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;

import java.net.URI;


public class HttpComponentsClientRestfulHttpRequestFactory extends HttpComponentsClientHttpRequestFactory {
    @Override
    protected HttpUriRequest createHttpUriRequest(HttpMethod httpMethod, URI uri) {

        if (httpMethod == HttpMethod.GET) {
            return new HttpGetRequestWithEntity(uri);
        }
        return super.createHttpUriRequest(httpMethod, uri);
    }

    /**
     * 定义HttpGetRequestWithEntity实现HttpEntityEnclosingRequestBase抽象类，以支持GET请求携带body数据
     */
    private static final class HttpGetRequestWithEntity extends HttpEntityEnclosingRequestBase {
        public HttpGetRequestWithEntity(final URI uri) {
            super.setURI(uri);
        }

        @Override
        public String getMethod() {
            return HttpMethod.GET.name();

        }
    }
}

3、创建RestTemplateConfig类

package com.liws.test.utils;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.client.SimpleClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;


@Configuration
public class RestTemplateConfig {
    @Bean
    public RestTemplate restTemplate() {

        RestTemplate restTemplate = new RestTemplate(getClientHttpRequestFactory());
        restTemplate.setRequestFactory(new HttpComponentsClientRestfulHttpRequestFactory());
        return restTemplate;
    }

    // 设置超时时间
    private SimpleClientHttpRequestFactory getClientHttpRequestFactory() {
        SimpleClientHttpRequestFactory clientHttpRequestFactory = new SimpleClientHttpRequestFactory();
        // Connect timeout 3s
        clientHttpRequestFactory.setConnectTimeout(60000);
        // Read timeout 3s
        clientHttpRequestFactory.setReadTimeout(60000);
        return clientHttpRequestFactory;
    }
}

4、创建测试类

package com.liws.test;

@SpringBootTest
public class HelloTestRestTemplate{

    @Autowired
    Environment env;

    @Autowired
    private RestTemplate restTemplate;

    @Test
    void TestRestTemplateForGet(){
        String url = env.getProperty("test.url");


        JSONObject object=new JSONObject();
        object.put("username","liws");
        object.put("phone","1828389121");
        String jsonData = object.toString();

        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        HttpEntity<String> httpEntity = new HttpEntity<>(jsonData, headers);
        ResponseEntity<String> responseEntity = restTemplate.exchange(url, HttpMethod.GET, httpEntity, String.class);

        HttpStatus statusCode = responseEntity.getStatusCode();
        String body = responseEntity.getBody();

        System.out.println(body);

    }

}