通过RestTemplate类实现跨平台请求

//向对应业务平台发起消息通知
        try {
            TBpMonitorAnchor monitorAnchor = monitorAnchorService.selectByPrimaryKey(anchorId);
            if (monitorAnchor != null) {
                TBpBusinessPlatformInfo businessPlatformInfo = businessPlatformInfoService.selectByPrimaryKey(monitorAnchor.getPlatformId());
                //获取到回调地址
                String callbackUrl = businessPlatformInfo.getCallbackUrl();

                RestTemplate restTemplate = new RestTemplate();
                //封装请求参数
                Map<String, Object> requestBody = new HashMap<String, Object>(16);
                Map<String, Object> map = new HashMap<>(16);
                map.put("anchorArchivesCode", monitorAnchor.getAnchorArchivesCode());
                map.put("anchorStatus", "-1"); 
                //将参数转化为字节类型(注意了类型为UTF-8)
                byte[] bytes = JSON.toJSONString(map).getBytes(StandardCharsets.UTF_8);
                //通过Base64对参数进行编码，对应的获取到参数是也要对其使用Base64解码，类型为编码类型(UTF-8)
                requestBody.put("data", Base64.getEncoder().encodeToString(bytes));
                requestBody.put("type", "monitorAnchorStatus");

                HttpHeaders requestHeaders = new HttpHeaders();
                //这三个一般为固定写法
                requestHeaders.setContentType(MediaType.APPLICATION_JSON);
                requestHeaders.set(HttpHeaders.ACCEPT_CHARSET, StandardCharsets.UTF_8.toString());
                requestHeaders.set(HttpHeaders.ACCEPT_ENCODING, StandardCharsets.UTF_8.toString());

                HttpEntity<Map<String, Object>> httpEntity = new HttpEntity<>(requestBody, requestHeaders);
                //发送post请求
                restTemplate.postForObject(callbackUrl, httpEntity, HttpDataResult.class);

            }
        } catch (Exception e) {
            log.error("发送消息拆除通知失败!");
            e.printStackTrace();
        }