springboot中实现http请求调用api
创建发送http请求service层
import org.springframework.http.*;
import org.springframework.stereotype.Service;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.RestTemplate;
/**
* @Author 冯战魁
* @Date 2018/1/23 下午5:43
*/
@Service
public class HttpClient {
public String client(String url, HttpMethod method, MultiValueMap<String, String> params){
RestTemplate client = new RestTemplate();
HttpHeaders headers = new HttpHeaders();
// 请勿轻易改变此提交方式,大部分的情况下,提交方式都是表单提交
headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
HttpEntity<MultiValueMap<String, String>> requestEntity = new HttpEntity<MultiValueMap<String, String>>(params, headers);
// 执行HTTP请求
ResponseEntity<String> response = client.exchange(url, HttpMethod.POST, requestEntity, String.class);
return response.getBody();
}
}
添加本地测试url localhost:8080/hello
import com.example.demo.service.HttpClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.*;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* @Author 冯战魁
* @Date 2018/1/8 上午11:17
*/
@RestController
public class HelloController {
@Autowired
HttpClient httpClient;
@RequestMapping("/hello")
public String hello(){
//api url地址
String url = "http://xxxx";
//post请求
HttpMethod method =HttpMethod.POST;
// 封装参数,千万不要替换为Map与HashMap,否则参数无法传递
MultiValueMap<String, String> params= new LinkedMultiValueMap<String, String>();
params.add("access_token", "xxxxx");
//发送http请求并返回结果
return httpClient.client(url,method,params);
}
}
访问localhost:8080/hello查看调用结果
curl http://localhost:8080/hello
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