java代码如何调用第三方服务呢?

调用第三方服务的实现思路

使用HttpClient 和 RestTemplate
    即可调用第三方服务

private static ResultIf<PdfPlanIdsDto> get(String url) {
    ResultIf<PdfPlanIdsDto> pdfPlanIdsDto = null;
    try {
        log.info("url={}", url);
        HttpHeaders headers = new HttpHeaders();
        headers.add("Accept", "application/json");
        headers.add("Content-Encoding", "UTF-8");
        headers.add("Content-Type", "application/json; charset=UTF-8");
        org.springframework.http.HttpEntity<String> requestEntity = new org.springframework.http.HttpEntity<>(null, headers);
        ResponseEntity<String> response = restTemplate.exchange(url, HttpMethod.GET,
                requestEntity, String.class);
        if (response.getStatusCode().equals(HttpStatus.OK)) {
            String body = response.getBody();
　　　　　　//转对象
            pdfPlanIdsDto= JSON.parseObject(body, new TypeReference<ResultIf<PdfPlanIdsDto>>() {
            });
        }
    } catch (Exception e) {
        log.error("{},请求服务器异常：{}", url,e);
    }
    return pdfPlanIdsDto;
}