RestTemplate发送HTTP请求
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2022-06-25 19:17:18
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POST请求
带Head头
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
//jsonParam是参数,headers是head头
HttpEntity<String> entity = new HttpEntity<>(jsonParam, headers);
log.info("请求URL【{}】,入参【{}】", url,jsonParam);
String resultStr = restTemplate.postForObject(url, entity, String.class);
log.info("返回结果【{}】",resultStr);
GET请求
带Head头
GET请求带Head头,需要转为exchange方式来实现
String url = http://127.0.0.1:8080/user/{123}
HttpEntity<MsgListParamDto> entity = new HttpEntity<>(null,getHttpHeaders());
url = assembleUrlParam(param,url);
log.info("请求URL【{}】,入参【{}】", url,param.toString());
//最后一个参数是参数变量,用于替换url地址中的变量
ResponseEntity<String> resultEntity = restTemplate.exchange(url, HttpMethod.GET, entity, String.class, param.getUserId());
log.info("返回HttpStatus【{}】,返回结果【{}】", resultEntity.getStatusCodeValue(),resultEntity.getBody());
GET请求把参数拼接到url中
/**
* 组装get请求参数到url
* @param param 请求参数
* @param url 请求路径
* @return String 组装参数之后的请求路径
*/
@NonNull
private <T> String assembleUrlParam(@NonNull T param, @NonNull String url) {
UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(url);
Map<String,Object> paramMap = JSONObject.parseObject(JSONObject.toJSONString(param), Map.class);
paramMap.forEach((k,v) -> builder.queryParam(k,v));
return builder.build().toString();
}
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