java使用RestTemplate封装post请求

今天药忘吃喽~ 2023-05-21 10:21 1阅读 0赞

之前笔者写过一篇比较实用的文章 [java使用httpclient封装post请求和get的请求][java_httpclient_post_get]，其实java中实现http请求还可以用 RestTemplate 完成，下面给出示例代码：

import com.alibaba.fastjson.JSONObject;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.http.*;
    import org.springframework.http.converter.StringHttpMessageConverter;
    import org.springframework.web.client.RestTemplate;
    
    import javax.annotation.PostConstruct;
    import java.nio.charset.Charset;
    
    public class HttpHelper { 
    
        private static Logger logger = LoggerFactory.getLogger(HttpHelper.class);
    
        private RestTemplate restTemplate;
        private HttpHeaders httpHeaders;
    
        @PostConstruct
        public void init() { 
            restTemplate = new RestTemplate();
            restTemplate.getMessageConverters().add(0, new StringHttpMessageConverter(Charset.forName("UTF-8")));
            httpHeaders = new HttpHeaders();
            httpHeaders.setContentType(org.springframework.http.MediaType.APPLICATION_JSON);
        }
    
        /** * post - json * @param params * @return */
        public String post(JSONObject params, String url) { 
    
    
            logger.info("请求参数：{}", params.toJSONString());
            ResponseEntity<String> response;
            try { 
                response = restTemplate.exchange(
                        url,
                        HttpMethod.POST,
                        new HttpEntity<>(params, httpHeaders),
                        String.class);
            } catch (Exception e) { 
                logger.error("请求异常", e);
                return "请求异常";
            }
            logger.info("响应结果：{}", JSONObject.toJSONString(response));
    
            if (response.getStatusCode().equals(HttpStatus.OK)) { 
                logger.info("请求成功，返回结果：{}", response.getBody());
                return response.getBody();
            }
    
            logger.error("请求失败，Http状态码：{}，返回结果：{}", response.getStatusCode(), response.getBody());
            return response.getBody();
        }
    }

RestTemplate 是 Spring 提供的用于访问Rest服务的客户端，RestTemplate 提供了多种便捷访问远程Http 服务的方法，能够大大提高客户端的编写效率。

[java_httpclient_post_get]: https://blog.csdn.net/qq9808/article/details/78320816