通过SpringBoot-RestTemplate

delete() 在特定的URL上对资源执行HTTP DELETE操作

exchange() 在URL上执行特定的HTTP方法，返回包含对象的ResponseEntity，这个对象是从响应体中映射得到的

execute() 在URL上执行特定的HTTP方法，返回一个从响应体映射得到的对象

getForEntity() 发送一个HTTP GET请求，返回的ResponseEntity包含了响应体所映射成的对象

getForObject() 发送一个HTTP GET请求，返回的请求体将映射为一个对象

postForEntity() POST 数据到一个URL，返回包含一个对象的ResponseEntity，这个对象是从响应体中映射得到的

postForObject() POST 数据到一个URL，返回根据响应体匹配形成的对象

headForHeaders() 发送HTTP HEAD请求，返回包含特定资源URL的HTTP头

optionsForAllow() 发送HTTP OPTIONS请求，返回对特定URL的Allow头信息

postForLocation() POST 数据到一个URL，返回新创建资源的URL

put() PUT 资源到特定的URL

导入springboot的web包

org.springframework.boot

spring-boot-starter-parent

2.0.4.RELEASE

org.apache.httpcomponents

httpclient

4.5.2

org.springframework.boot

spring-boot-configuration-processor

true

org.springframework.boot

spring-boot-starter-aop

org.springframework.boot

spring-boot-starter-web

org.springframework.boot

spring-boot-starter-tomcat

org.springframework.boot

spring-boot-starter-jetty

org.springframework.boot

spring-boot-starter-test

test

在启动类同包下创建RestTemplateConfig.java类

importorg.springframework.context.annotation.Bean;importorg.springframework.context.annotation.Configuration;importorg.springframework.http.client.ClientHttpRequestFactory;importorg.springframework.http.client.SimpleClientHttpRequestFactory;importorg.springframework.web.client.RestTemplate;

@Configurationpublic classRestTemplateConfig {

@BeanpublicRestTemplate restTemplate(ClientHttpRequestFactory factory){return newRestTemplate(factory);

}

@BeanpublicClientHttpRequestFactory simpleClientHttpRequestFactory(){

SimpleClientHttpRequestFactory factory= newSimpleClientHttpRequestFactory();

factory.setConnectTimeout(15000);

factory.setReadTimeout(5000);returnfactory;

}

}

然后在Service类(RestTemplateToInterface )中注入使用

importcom.alibaba.fastjson.JSONObject;importcom.swordfall.model.User;importorg.springframework.beans.factory.annotation.Autowired;import org.springframework.http.*;importorg.springframework.stereotype.Service;importorg.springframework.web.client.RestTemplate;

@Servicepublic classRestTemplateToInterface {

@AutowiredprivateRestTemplate restTemplate;/*** 以get方式请求第三方http接口 getForEntity

*@paramurl

*@return

*/

publicUser doGetWith1(String url){

ResponseEntity responseEntity = restTemplate.getForEntity(url, User.class);

User user=responseEntity.getBody();returnuser;

}/*** 以get方式请求第三方http接口 getForObject

* 返回值返回的是响应体，省去了我们再去getBody()

*@paramurl

*@return

*/

publicUser doGetWith2(String url){

User user= restTemplate.getForObject(url, User.class);returnuser;

}/*** 以post方式请求第三方http接口 postForEntity

*@paramurl

*@return

*/

publicString doPostWith1(String url){

User user= new User("小白", 20);

ResponseEntity responseEntity = restTemplate.postForEntity(url, user, String.class);

String body=responseEntity.getBody();returnbody;

}/*** 以post方式请求第三方http接口 postForEntity

*@paramurl

*@return

*/

publicString doPostWith2(String url){

User user= new User("小白", 20);

String body= restTemplate.postForObject(url, user, String.class);returnbody;

}/*** exchange

*@return

*/

publicString doExchange(String url, Integer age, String name){//header参数

HttpHeaders headers = newHttpHeaders();

String token= "asdfaf2322";

headers.add("authorization", token);

headers.setContentType(MediaType.APPLICATION_JSON);//放入body中的json参数

JSONObject obj = newJSONObject();

obj.put("age", age);

obj.put("name", name);//组装

HttpEntity request = new HttpEntity<>(obj, headers);

ResponseEntity responseEntity = restTemplate.exchange(url, HttpMethod.POST, request, String.class);

String body=responseEntity.getBody();returnbody;

}

}