restTemplate 使用1

public String getCode(String jsCode) {
        try {
            String url= "http://www.baidu.com"
            ResponseEntity responseEntity = restTemplate.getForEntity(url, WeChatSessionVo.class);
            if (responseEntity.getStatusCode().equals(HttpStatus.OK)) {
                log.info("返回body为:{}", JacksonTool.toJson(responseEntity.getBody()));
                WeChatSessionVo vo= (WeChatSessionVo) responseEntity.getBody();
                return vo.getOpenid();
            }
        } catch (Exception e) {
            log.error("信息出错,jsCode:{}", jsCode, e);
        }
        return null;
    }