springboot 发起对外http post请求

直接贴已完成代码

public PayResponse payHttpRequest( MultiValueMap<String, String> params, String signature){
    RestTemplate restTemplate = new RestTemplate();
    HttpHeaders httpHeaders = new HttpHeaders();
    HttpMethod method = HttpMethod.POST;
    httpHeaders.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
    params.add("appKey",appKey);
    params.add("secret",signature);
    HttpEntity<MultiValueMap<String, String>> requestEntity = new HttpEntity<MultiValueMap<String, String>>(params, httpHeaders);
    //执行HTTP请求
    try{
        ResponseEntity<PayResponse> response = restTemplate.postForEntity(orderCreateUrl, requestEntity, PayResponse.class);
        return response.getBody();
    }catch (Exception e){
        return null;
    }
}
1.HttpEntity最好使用MultiValueMap进行发起，不然容易出错
2.restTemplate.postForEntity(orderCreateUrl, requestEntity, PayResponse.class) 中的元类，会在得到response响应后根据对应的类进行数据解析，不要用Object直接去解析，后续会很难处理