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目前遇到一个对接需求,对方公司提供了一个接口,请求方法为GET,传参是在body中的json格式数据。
针对这个需求,在postman中进行测试,请求成功,后续需要用java进行接口调用。
首先,我们要了解 RestTemplate 请求方法和 HTTP 请求方法的对应关系。
HTTP method | RestTemplate methods |
---|
DELETE | delete | GET | getForObject / getForEntity | HEAD | headForHeaders | OPTIONS | optionsForAllow | POST | postForLocation / postForObject | PUT | put | any | exchange / execute |
当使用get请求需要携带 body中的参数的时候 需要重写Http 版本号必须是4.3以上版本
定义HttpGetRequestWithEntity实现HttpEntityEnclosingRequestBase抽象类,以支持GET请求携带body数据
- pom 文件引入
<dependency>
<groupId>commons-httpclient</groupId>
<artifactId>commons-httpclient</artifactId>
<version>3.1</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.3</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpmime</artifactId>
<version>4.5.3</version>
</dependency>
- 定义 HttpGetRequestWithEntity 实现 HttpEntityEnclosingRequestBase 抽象类
创建 HttpComponentsClientRestfulHttpRequestFactory.java
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);
}
private static final class HttpGetRequestWithEntity extends HttpEntityEnclosingRequestBase {
public HttpGetRequestWithEntity(final URI uri) {
super.setURI(uri);
}
@Override
public String getMethod() {
return HttpMethod.GET.name();
}
}
}
- 配置 RestTemplateConfig,将步骤 2 的 HttpComponentsClientRestfulHttpRequestFactory 类注入
@Configuration
public class RestTemplateConfig {
@Bean(name="remoteRestTemplate")
public RestTemplate restTemplate(ClientHttpRequestFactory simpleClientHttpRequestFactory){
RestTemplate restTemplate = new RestTemplate(simpleClientHttpRequestFactory);
restTemplate.setRequestFactory(new HttpComponentsClientRestfulHttpRequestFactory());
return restTemplate;
}
@Bean
public ClientHttpRequestFactory simpleClientHttpRequestFactory(){
SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
factory.setConnectTimeout(60000);
factory.setReadTimeout(20000);
return factory;
}
}
- 发起 body 带 json 参数的 GET 请求
public ResponseEntity<Object> createCodeByNumber(String url, String boxSignerId) {
JSONObject jsonObject = new JSONObject();
jsonObject.put(BOXSIGNERID, boxSignerId);
jsonObject.put(SECRET, secret);
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
HttpEntity<String> httpEntity = new HttpEntity<>(JSON.toJSONString(jsonObject), headers);
log.info("url:" + url + ",httpEntity:" + JSON.toJSONString(httpEntity));
ResponseEntity<Object> response = restTemplate.exchange(url, HttpMethod.GET, httpEntity, Object.class);
log.info("{}请求的返回内容:{}", url, JSON.parseObject(JSON.toJSONString(response.getBody())));
return response;
}
参考资料: RestTemplate的请求参数传递问题 RestTemplate发送Get请求通过body传参问题
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