RestTemplate 使用

女爷i 2023-06-20 09:11 1阅读 0赞

### 1. 项目中创建实例（当然也可以使用时创建实例） ###

@Configuration
    public class RestTemplateConfig {
        @Bean(name = "factory")
        public ClientHttpRequestFactory simpleClientHttpRequestFactory() {
            SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
            factory.setConnectTimeout(15000);
            factory.setReadTimeout(5000);
            return factory;
        }
        
        @Bean(name = "restTemplate")
        public RestTemplate restTemplate(ClientHttpRequestFactory factory) {
            return new RestTemplate(factory);
        }
    }

### 1. GET请求 ###

@Autowired
    private RestTemplate restTemplate;
        
    ...
    // 封装Header 一般来说不需要封装
    HttpHeaders requestHeaders = new HttpHeaders();
    requestHeaders.add("", "keep-alive");
    
    HttpEntity<String> requestEntity = new HttpEntity<>(null, requestHeaders);
                    
    // 根据不同的相应类型来接取
     ResponseEntity<String> entity = restTemplate.exchange(url, HttpMethod.GET, requestEntity, String.class);
    
     ResponseEntity<Resource> entity = rest.exchange(matchUrl, HttpMethod.GET, requestEntity, Resource.class);
     
     ResponseEntity<Map> entity =  restTemplate.exchange(url,HttpMethod.GET,Resource,Map.class);

### 2. post请求 ###

HttpHeaders requestHeaders = new HttpHeaders();
    requestHeaders.add("Content-type", "application/json; charset=utf-8");
    Map<String,Object> body = new HashMap<>();
    body.put("id",1);
    HttpEntity<Map> requestEntity = new HttpEntity<>(body, requestHeaders);
    // 根据不同的相应类型来接取
     ResponseEntity<String> entity = restTemplate.exchange(url, HttpMethod.POST, requestEntity, String.class);
    
     ResponseEntity<Resource> entity = rest.exchange(matchUrl, HttpMethod.POST, requestEntity, Resource.class);
     
     ResponseEntity<Map> entity =  restTemplate.exchange(url,HttpMethod.POST,Resource,Map.class);