RestTemplate实现跨域调用接口

时间:2024-03-18 18:25:22

本文主要针对post方式,发送请求。

import com.alibaba.fastjson.JSONObject;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.ResponseEntity;
import org.springframework.http.client.SimpleClientHttpRequestFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.client.RestTemplate;


import java.util.HashMap;
import java.util.Map;


/**
 * 调用mufly_api接口
 * Created by 耿洪生 on 2016/10/17.
 */
@Component
public class HttpEntityServiceImpl {
    @Value("${muflyapi.appid}")
    private String appID;


    public ResponseEntity<String> responseHttpEntity(String url, Object parameters) {
        Map<String, Object> requestObject = new HashMap<>();
        requestObject.put("appID", appID);
        requestObject.put("parameters", parameters);
        //转json字符串
        JSONObject jsonObject = (JSONObject) JSONObject.toJSON(requestObject);
        String jsonStr = jsonObject.toJSONString();
        //设置HttpHeader
        HttpHeaders headers = new HttpHeaders();
        headers.set("Content-Type", "application/json;charset=UTF-8");
        //设置HttpEntity
        HttpEntity<String> entity = new HttpEntity<String>(jsonStr, headers);


        //设置连接、读取超时时间
        SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
        factory.setConnectTimeout(30 * 1000);
        factory.setReadTimeout(60 * 1000);


        //接口调用
        RestTemplate temp = new RestTemplate(factory);
        ResponseEntity<String> output = temp.postForEntity(url, entity, String.class);
        return output;
    }

}


如果,你不想new,可以使用@Autowired直接引入:

@Autowired
private RestTemplate restTemplate;

/**
 * post请求
 *
 * @param url
 * @param data  map类型
 * @param token
 * @return 实体
 */
public ResponseEntity<String> post(String url, Map data, String token) {
    HttpHeaders headers = new HttpHeaders();
    headers.add("Accept", "application/json");
    headers.add("Accept-Encoding", "gzip");
    headers.add("Content-Encoding", "UTF-8");
    headers.add("Content-Type", "application/json;charset=UTF-8");
    headers.add("Token", token);
    String dataStr = JsonUtil.toJSon(data);
    HttpEntity<String> postEntity = new HttpEntity<>(dataStr, headers);
    return restTemplate.postForEntity(url, postEntity, String.class);
}

至于设置restTemplate bean 的超时:

@Bean(name="restTemplate")
RestTemplate restTemplate() {
   ClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
       //设置连接、读取超时时间
       ((SimpleClientHttpRequestFactory) factory).setConnectTimeout(30 * 1000);
       ((SimpleClientHttpRequestFactory) factory).setReadTimeout(60 * 1000);
   return new RestTemplate();
}


spring自带的restTemplate里有很多实用的方法,

RestTemplate实现跨域调用接口

其底层还是ClientHttpRequest,

RestTemplate实现跨域调用接口

以此记录。