Java发送请求到第三方（RestTemplate方式）

公共方法

 private HttpHeaders createHeaders() {
        HttpHeaders headers = new HttpHeaders();
        headers.add("Authorization", "Bearer token");
        headers.add("User-Agent", "Mozilla/5.0");
        return headers;
    }

    private RestTemplate createRestTemplate() {
        RestTemplate restTemplate = new RestTemplate();
        List> messageConverters = restTemplate.getMessageConverters();
        for (HttpMessageConverter messageConverter : messageConverters) {
            if (messageConverter instanceof StringHttpMessageConverter) {
                ((StringHttpMessageConverter) messageConverter).setDefaultCharset(StandardCharsets.UTF_8);
            }
        }
        return restTemplate;
    }

Get请求

    private Map sendGetRequest() throws Exception {
        HttpHeaders headers = createHeaders();
        // 可以在这里再添加请求头
        HttpEntity entity = new HttpEntity(headers);

        RestTemplate restTemplate = createRestTemplate();
        String url ="http://localhost:8080/...";
        ResponseEntity responseEntity = restTemplate.exchange(url, HttpMethod.GET, entity, String.class);

        int statusCodeValue = responseEntity.getStatusCodeValue();
        String responseBody = responseEntity.getBody();

        ObjectMapper objectMapper = new ObjectMapper();
        return objectMapper.readValue(responseBody, Map.class);
    }

Post请求

    private Map sendPostRequest(Object requestObject) throws Exception {
        HttpHeaders headers = createHeaders();
        // 可以在这里再添加请求头
        headers.setContentType(MediaType.APPLICATION_JSON);

        ObjectMapper objectMapper = new ObjectMapper();
        String requestJson = objectMapper.writeValueAsString(requestObject);
        HttpEntity entity = new HttpEntity(requestJson, headers);

        RestTemplate restTemplate = createRestTemplate();
        String url ="http://localhost:8080/...";
        ResponseEntity responseEntity = restTemplate.exchange(url, HttpMethod.POST, entity, String.class);

        int statusCodeValue = responseEntity.getStatusCodeValue();
        String responseBody = responseEntity.getBody();

        Map map = objectMapper.readValue(responseBody, Map.class);

        if (statusCodeValue == 200 && Integer.parseInt(String.valueOf(map.get("status"))) >= 0) {
            return map;
        }

        return null; // 请求失败时返回 null 或者抛出异常
    }