调用第三方接口-RestTemplate

2025/9/26 5:15:06 来源：https://blog.csdn.net/m0_71845127/article/details/140555206 浏览: 次关键词：调用第三方接口-RestTemplate

调用方式

- POST请求
- - 单个新增
  - 批量新增
- GET请求
- - 1.含@PathVariable
  - 2.查询列表

POST请求

单个新增

例如后端接口接收参数为 User user
使用RestTemplate发送post请求，暂未进行异常处理

//封装body信息
JsonObject jsonObject = new JsonObject();
jsonObject.put("userName","张三");
jsonObject.put("city","北京");//选择性设置请求头header信息，token
HttpHeaders httpHeaders = new HttpHeaders();
httpHeaders.add("Authorization","bearer redaijDffADJewee23Sd");
httpHeaders.setContentType(MediaType.APPLICATION_JSON);
HttpEntity<JsonObject> httpEntity = new HttpEntity<>(jsonObject,httpHeaders);String url = "请求接口url"
//发送post请求
ResponseEntity<JsonObject> responseEntity = restTemplate.postForEntity(url, httpEntity, JsonObject.class);
if(responseEntity.getStatusCode().is2xxSucessful() && responseEntity.getBody() != null){JsonObject bodyData = responseEntity.getBody();System.out.println("请求数据："+ bodyData + ",请求接口url：" + url);
}

批量新增

例如后端接口接收参数为List users
使用RestTemplate发送post请求

JsonArray jsonArray = new JsonArray();
//封装body信息
JsonObject jsonObject1 = new JsonObject();
jsonObject1.put("userName","张三");
jsonObject1.put("city","北京");
jsonArray.add(jsonObject1);JsonObject jsonObject2 = new JsonObject();
jsonObject2.put("userName","朱四");
jsonObject2.put("city","南京");
jsonArray.add(jsonObject2);//String body = jsonArray.toJsonString();//选择性设置请求头header信息，token
HttpHeaders httpHeaders = new HttpHeaders();
httpHeaders.add("Authorization","bearer redaijDffADJewee23Sd");
httpHeaders.setContentType(MediaType.APPLICATION_JSON);
//HttpEntity<String> httpEntity = new HttpEntity<>(body,httpHeaders);
HttpEntity<JsonArray> httpEntity = new HttpEntity<>(jsonArray,httpHeaders);String url = "请求接口url"
//发送post请求
ResponseEntity<JsonObject> responseEntity = restTemplate.postForEntity(url, httpEntity, JsonObject.class);
if(responseEntity.getStatusCode().is2xxSucessful() && responseEntity.getBody() != null){JsonObject bodyData = responseEntity.getBody();System.out.println("请求数据："+ bodyData + ",请求接口url：" + url)；
}

GET请求

1.含@PathVariable

服务端接口http://12.131.23.1/user/get/{userId}
参数(PathVariable(“userId”) String userId)

String url = "http://12.131.23.1/user/get/{userId}";
HttpHeaders httpHeaders = new HttpHeaders();
httpHeaders.add("Authorization","bearer redaijDffADJewee23Sd");
String httpBody = null;
HttpEntity<String> httpEntity = new HttpEntity<>(httpBody,httpHeaders);
ResponseEntity<JsonObject> responseEntity = restTemplate.exchange(url, HttpMethod.GET, httpEntity, JsonObject.class,"userId");
System.out.println(responseEntity.getBody());

2.查询列表

使用RestTemplate发送GET请求，如查询列表
服务端接口http://12.131.23.1/user/list
参数(UserReqDto userReqDto)

String url = "http://12.131.23.1/user/list?userName={userName}"HttpHeaders httpHeaders = new HttpHeaders();
httpHeaders.add("Authorization","bearer redaijDffADJewee23Sd");
String httpBody = null;
HttpEntity<String> httpEntity = new HttpEntity<>(httpBody,httpHeaders);Map<String,Object> queryMap = new HashMap<>();
queryMap.put("userName","张三");
ResponseEntity<JsonObject> responseEntity = restTemplate.exchange(url, HttpMethod.GET, httpEntity, JsonObject.class, queryMap);
System.out.println(responseEntity.getBody());