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SpringBoot调用外部接口的3种方式
1.使用原始httpClient请求
/*
* @description get方式获取入参，插入数据并发起流程
* @author lyx
* @date 2022/8/24 16:05
* @params documentId
* @return String
*/
//
@RequestMapping("/submit/{documentId}")
public String submit1(@PathVariable String documentId) throws ParseException {
//此处将要发送的数据转换为json格式字符串
Map map =task2Service.getMap(documentId);
String jsonStr = JSON.toJSONString(map, SerializerFeature.WRITE_MAP_NULL_FEATURES,SerializerFeature.QuoteFieldNames);
JSONObject jsonObject = JSON.parseObject(jsonStr);
JSONObject sr = task2Service.doPost(jsonObject);
return sr.toString();
}
/*
* @description 使用原生httpClient调用外部接口
* @author lyx
* @date 2022/8/24 16:08
* @params date
* @return JSONObject
*/
public static JSONObject doPost(JSONObject date) {
String assessToken="eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzUxMiJ9.eyJ4ZGFwYXBwaWQiOiIzNDgxMjU4ODk2OTI2OTY1NzYiLCJleHAiOjE2NjEyMjY5MDgsImlhdCI6MTY2MTIxOTcwOCwieGRhcHRlbmFudGlkIjoiMzAwOTgxNjA1MTE0MDUyNjA5IiwieGRhcHVzZXJpZCI6IjEwMDM0NzY2MzU4MzM1OTc5NTIwMCJ9.fZAO4kJSv2rSH0RBiL1zghdko8Npmu_9ufo6Wex_TI2q9gsiLp7XaW7U9Cu7uewEOaX4DTdpbFmMPvLUtcj_sQ";
CloseableHttpClient client = HttpClients.createDefault();
// 要调用的接口url
String url = "http://39.103.201.110:30661 /xdap-open/open/process/v1/submit";
HttpPost post = new HttpPost(url);
JSONObject jsonObject = null;
try {
//创建请求体并添加数据
StringEntity s = new StringEntity(date.toString());
//此处相当于在header里头添加content-type等参数
s.setContentType("application/json");
s.setContentEncoding("UTF-8");
post.setEntity(s);
//此处相当于在Authorization里头添加Bear token参数信息
post.addHeader("Authorization", "Bearer " +assessToken);
HttpResponse res = client.execute(post);
String response1 = EntityUtils.toString(res.getEntity());
if (res.getStatusLine()
.getStatusCode() == HttpStatus.SC_OK) {
// 返回json格式：
String result = EntityUtils.toString(res.getEntity());
jsonObject = JSONObject.parseObject(result);
}
} catch (Exception e) {
throw new RuntimeException(e);
}
return jsonObject;
}
2.使用RestTemplate方法
Spring-Boot开发中，RestTemplate同样提供了对外访问的接口API，这里主要介绍Get和Post方法的使用。 Get请求提供了getForObject 、getForEntity两种方式，其中getForEntity如下三种方法的实现： Get–getForEntity，存在以下两种方式重载 1.getForEntity(Stringurl,Class responseType,Object…urlVariables) 2.getForEntity(URI url,Class responseType) Get–getForEntity(URI url,Class responseType) //该方法使用URI对象来替代之前的url和urlVariables参数来指定访问地址和参数绑定。URI是JDK java.net包下的一个类，表示一个统一资源标识符(Uniform Resource Identifier)引用。参考如下： RestTemplate restTemplate=new RestTemplate(); UriComponents uriComponents=UriComponentsBuilder.fromUriString("http://USER-SERVICE/user?name={name}") .build() .expand("dodo") .encode(); URI uri=uriComponents.toUri(); ResponseEntityresponseEntity=restTemplate.getForEntity(uri,String.class).getBody(); Get–getForEntity(Stringurl,Class responseType,Object…urlVariables) //该方法提供了三个参数，其中url为请求的地址，responseType为请求响应body的包装类型，urlVariables为url中的参数绑定，该方法的参考调用如下： // http://USER-SERVICE/user?name={name) RestTemplate restTemplate=new RestTemplate(); Mapparams=new HashMap(); params.put("name","dada"); // ResponseEntityresponseEntity=restTemplate.getForEntity("http://USERSERVICE/user?name={name}",String.class,params); Get–getForObject，存在以下三种方式重载 1.getForObject(String url,Class responseType,Object...urlVariables) 2.getForObject(String url,Class responseType,Map urlVariables) 3.getForObject(URI url,Class responseType)getForObject方法可以理解为对getForEntity的进一步封装，它通过HttpMessageConverterExtractor对HTTP的请求响应体body内容进行对象转换，实现请求直接返回包装好的对象内容。 Post请求Post请求提供有postForEntity、postForObject和postForLocation三种方式，其中每种方式都有三种方法，下面介绍postForEntity的使用方法。 Post–postForEntity，存在以下三种方式重载 1.postForEntity(String url,Object request,Class responseType,Object… uriVariables) 2.postForEntity(String url,Object request,Class responseType,Map uriVariables) 3.postForEntity(URI url,Object request，Class responseType) 如下仅演示第二种重载方式 /* * @description post方式获取入参，插入数据并发起流程 * @author lyx * @date 2022/8/24 16:07 * @params * @return */ @PostMapping("/submit2") public Object insertFinanceCompensation(@RequestBody JSONObject jsonObject) { String documentId=jsonObject.get("documentId").toString(); return task2Service.submit(documentId); } /* * @description 使用restTimeplate调外部接口 * @author lyx * @date 2022/8/24 16:02 * @params documentId * @return String */ public String submit(String documentId){ String assessToken="eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzUxMiJ9.eyJ4ZGFwYXBwaWQiOiIzNDgxMjU4ODk2OTI2OTY1NzYiLCJleHAiOjE2NjEyMjY5MDgsImlhdCI6MTY2MTIxOTcwOCwieGRhcHRlbmFudGlkIjoiMzAwOTgxNjA1MTE0MDUyNjA5IiwieGRhcHVzZXJpZCI6IjEwMDM0NzY2MzU4MzM1OTc5NTIwMCJ9.fZAO4kJSv2rSH0RBiL1zghdko8Npmu_9ufo6Wex_TI2q9gsiLp7XaW7U9Cu7uewEOaX4DTdpbFmMPvLUtcj_sQ"; RestTemplate restTemplate = new RestTemplate(); //创建请求头 HttpHeaders httpHeaders = new HttpHeaders(); //此处相当于在Authorization里头添加Bear token参数信息 httpHeaders.add(HttpHeaders.AUTHORIZATION, "Bearer " + assessToken); //此处相当于在header里头添加content-type等参数 httpHeaders.add(HttpHeaders.CONTENT_TYPE,"application/json"); Map map = getMap(documentId); String jsonStr = JSON.toJSONString(map); //创建请求体并添加数据 HttpEntity httpEntity = new HttpEntity(map, httpHeaders); String url = "http://39.103.201.110:30661/xdap-open/open/process/v1/submit"; ResponseEntity forEntity = restTemplate.postForEntity(url,httpEntity,String.class);//此处三个参数分别是请求地址、请求体以及返回参数类型 return forEntity.toString(); } 3.使用Feign进行消费在maven项目中添加依赖 org.springframework.cloud spring-cloud-starter-feign 1.2.2.RELEASE启动类上加上@EnableFeignClients @SpringBootApplication @EnableFeignClients @ComponentScan(basePackages = {"com.definesys.mpaas", "com.xdap.*" ,"com.xdap.*"}) public class MobilecardApplication { public static void main(String[] args) { SpringApplication.run(MobilecardApplication.class, args); } }此处编写接口模拟外部接口供feign调用外部接口方式使用 定义controller @Autowired PrintService printService; @PostMapping("/outSide") public String test(@RequestBody TestDto testDto) { return printService.print(testDto); }定义service @Service public interface PrintService { public String print(TestDto testDto); }定义serviceImpl public class PrintServiceImpl implements PrintService { @Override public String print(TestDto testDto) { return "模拟外部系统的接口功能"+testDto.getId(); } }构建Feigin的Service 定义service //此处name需要设置不为空，url需要在.properties中设置 @Service @FeignClient(url = "${outSide.url}", name = "service2") public interface FeignService2 { @RequestMapping(value = "/custom/outSide", method = RequestMethod.POST) @ResponseBody public String getMessage(@Valid @RequestBody TestDto testDto); }定义controller @Autowired FeignService2 feignService2; //测试feign调用外部接口入口 @PostMapping("/test2") public String test2(@RequestBody TestDto testDto) { return feignService2.getMessage(testDto); }添加Header解决方法 将token等信息放入Feign请求头中，主要通过重写RequestInterceptor的apply方法实现 定义config @Configuration public class FeignConfig implements RequestInterceptor { @Override public void apply(RequestTemplate requestTemplate) { //添加token requestTemplate.header("token", "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzUxMiJ9.eyJ4ZGFwYXBwaWQiOiIzNDgxMjU4ODk2OTI2OTY1NzYiLCJleHAiOjE2NjEyMjY5MDgsImlhdCI6MTY2MTIxOTcwOCwieGRhcHRlbmFudGlkIjoiMzAwOTgxNjA1MTE0MDUyNjA5IiwieGRhcHVzZXJpZCI6IjEwMDM0NzY2MzU4MzM1OTc5NTIwMCJ9.fZAO4kJSv2rSH0RBiL1zghdko8Npmu_9ufo6Wex_TI2q9gsiLp7XaW7U9Cu7uewEOaX4DTdpbFmMPvLUtcj_sQ"); } }定义service @Service @FeignClient(url = "${outSide.url}",name = "feignServer", configuration = FeignDemoConfig.class) public interface TokenDemoClient { @RequestMapping(value = "/custom/outSideAddToken", method = RequestMethod.POST) @ResponseBody public String getMessage(@Valid @RequestBody TestDto testDto); }定义controller //测试feign调用外部接口入口，加上token @PostMapping("/testToken") public String test4(@RequestBody TestDto testDto) { return tokenDemoClient.getMessage(testDto); }版权声明：本文为CSDN博主「Chelsea」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。原文链接：https://blog.csdn.net/Chelsea/article/details/126689495 |
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