Spring的RestTemplate实现restful接口的调用

1.设置请求头

// 请求头headers设置为json
// {Content-Type=[application/json;charset=UTF-8], Accept=[application/json;charset=UTF-8],X-Access-Token=[eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJleHAiOjE2MTA5NjAzMjQsInVzZXJuYW1lIjoiMzMwMDAwIn0.CeYu-nD5HkKqacNsgcJgkwb0ZfRB9GbGpx5KDIbHUlE]}
public static HttpHeaders getHeaders(String token) {
HttpHeaders headers = new HttpHeaders();
String mediaType = MediaType.APPLICATION_JSON_UTF8_VALUE;//application/json;charset=UTF-8
headers.setContentType(MediaType.parseMediaType(mediaType));
headers.set("Accept", mediaType);
headers.set("X-Access-Token", token);
return headers;
}

//上传文件请求类型要设置成文件类型
////{Content-Type=[multipart/form-data], Accept=[application/json;charset=UTF-8], X-Access-Token=[eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJleHAiOjE2MTA5NjEwMzIsInVzZXJuYW1lIjoiMzMwMDAwIn0.IpUl2VncZD1lshEjK5IlEYFFNJuXzmZIcXeyZPk2WXc]}
public static HttpHeaders getHeadersFormData(String token) {
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.MULTIPART_FORM_DATA);//multipart/form-data
headers.set("Accept", MediaType.APPLICATION_JSON_UTF8_VALUE);
headers.set("X-Access-Token", token);
return headers;
}

2.接口调用

2.1入参为普通json数据，适合post、put请求

JSONObject jtcyxxAddJson = new JSONObject();
jtcyxxAddJson.put("batchno", batchno);
jtcyxxAddJson.put("exDataRequestBatchnoList", arrayList);
log.info("jtcyxx_json========="+jtcyxxAddJson);
String jtcyxxAddJson_To_Str = jtcyxxAddJson.toString();//将json转为String字符串
RestTemplate restTemplate = new RestTemplate();
HttpEntity<String> request = new HttpEntity<>(jtcyxxAddJson_To_Str, headers);
ResponseEntity<JSONObject> responseEntity = restTemplate.exchange(PersonAddUrl, HttpMethod.POST, request, JSONObject.class);
log.info("人员信息添加返回信息======="+responseEntity);

2.2入参为附件

String filePath = CxhCreateUtils.returnCxhUrl(batchno, xzqhms, jzlxmc, firstname, rs);
// 封装请求参数
FileSystemResource resource = new FileSystemResource(new File(filePath));
System.out.println("resource========="+resource);
MultiValueMap<String, Object> params = new LinkedMultiValueMap<>();
params.add("file", resource); //服务端MultipartFile uploadFile
System.out.println("params========="+params);
//param.add("param1", "test"); //服务端如果接受额外参数，可以传递
System.out.println("--- 开始上传文件 ---");
HttpEntity<MultiValueMap<String, Object>> request = new HttpEntity<>(params, headers);
System.out.println("request======"+request);
RestTemplate restTemplate = new RestTemplate();
ResponseEntity<JSONObject> upload = restTemplate.exchange(FileAddUploadUrl, HttpMethod.POST, request, JSONObject.class);
System.out.println("--- 上传文件结束 ---" + upload);
//<200 OK,{"result":"group1/M00/00/01/oYYBAGAGhL6AZVaXAAEqfBs6kio893.pdf","code":0,"success":true,"message":"group1/M00/00/01/oYYBAGAGhL6AZVaXAAEqfBs6kio893.pdf","timestamp":1611039934598},{Access-Control-Allow-Methods=[GET,POST,OPTIONS,PUT,DELETE], Access-Control-Allow-Credentials=[true], Set-Cookie=[rememberMe=deleteMe; Path=/exchange-boot; Max-Age=0; Expires=Mon, 18-Jan-2021 07:05:34 GMT], vary=[accept-encoding], Content-Type=[application/json;charset=UTF-8], Transfer-Encoding=[chunked], Date=[Tue, 19 Jan 2021 07:05:34 GMT]}>
JSONObject uploadJson = upload.getBody();
filePath_result = uploadJson.getString("result");