使用Spring的RestTemplate发送GET请求，并支持传递Request body参数详细实例
1. 在pom.xml中添加依赖包
注意：版本需要在4.3.4以上，否则运行的时候会报java.lang.NoClassDefFoundError: org/apache/http/impl/client/HttpClients错误
2. 扩展HttpComponentsClientHttpRequestFactory
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.在定义RestTemplate时，使用自定义factory
RestTemplate restTemplate = new RestTemplate();
//修改restTemplate的RequestFactory使其支持Get携带body参数
restTemplate.setRequestFactory(new HttpComponentsClientRestfulHttpRequestFactory());
return restTemplate;
4.定义实体类
public class RequestBodyExample {
@JsonProperty(value = "provinceCode")
private String provinceCode;
@JsonProperty(value = "reference1")
private String reference1;
@JsonProperty(value = "requestId")
private String requestId;
public String getProvinceCode() {
return provinceCode;
}
public void setProvinceCode(String provinceCode) {
this.provinceCode = provinceCode;
}
public String getReference1() {
return reference1;
}
public void setReference1(String reference1) {
this.reference1 = reference1;
}
public String getRequestId() {
return requestId;
}
public void setRequestId(String requestId) {
this.requestId = requestId;
}
public RequestBodyExample() {
}
public RequestBodyExample(String provinceCode, String reference1, String requestId) {
this.provinceCode = provinceCode;
this.reference1 = reference1;
this.requestId = requestId;
}
}
5. 在controller中使用restTemplate
@RequestMapping(value = "/test",produces = {
"application/json;charset=UTF-8"}, method = RequestMethod.GET)
public String getTestdata(@RequestBody RequestBodyExample requestBodyExample) {
logger.info("测试获取get请求传递过来的body参数");
return JsonUtil.objToJson(requestBodyExample);
}
@RequestMapping(value = "/testGetbody", produces = {
"application/json;charset=UTF-8"}, method = RequestMethod.GET)
public String getbodyExample() {
logger.info("测试restTemplate get请求带body参数");
String url = "http://localhost:8081/test";
HttpHeaders httpHeaders = new HttpHeaders();
httpHeaders.setContentType(MediaType.APPLICATION_JSON);
httpHeaders.setAccept(Arrays.asList(MediaType.APPLICATION_JSON));
String body = "{\"provinceCode\": \"12\",\"reference1\": \"13\",\"requestId\": \"13\"}";
HttpEntity
ResponseEntity
String result = response.getBody();
return result;
}
参考文章：http://www.belonk.com/c/http_resttemplate_get_with_body.html