springboot 注入 restTemplate-白红宇

手动实例化，这个我基本不用

RestTemplate restTemplate = new RestTemplate();

依赖注入，通常情况下我使用 java.net 包下的类构建的 SimpleClientHttpRequestFactory

@Configurationpublic class RestConfiguration {    @Bean    @ConditionalOnMissingBean({RestOperations.class, RestTemplate.class})    public RestOperations restOperations() {        SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory();        requestFactory.setReadTimeout(5000);        requestFactory.setConnectTimeout(5000);        RestTemplate restTemplate = new RestTemplate(requestFactory);        // 使用 utf-8 编码集的 conver 替换默认的 conver（默认的 string conver 的编码集为 "ISO-8859-1"）        List
    
     > messageConverters = restTemplate.getMessageConverters();        Iterator
     
      > iterator = messageConverters.iterator();        while (iterator.hasNext()) {            HttpMessageConverter
       converter = iterator.next();            if (converter instanceof StringHttpMessageConverter) {                iterator.remove();            }        }        messageConverters.add(new StringHttpMessageConverter(Charset.forName("UTF-8")));        return restTemplate;    }}

请求地址

get 请求 url 为

http://localhost:8080/test/sendSms?phone=手机号&msg=短信内容

错误使用

@Autowiredprivate RestOperations restOperations;public void test() throws Exception{    String url = "http://localhost:8080/test/sendSms";    Map
    
      uriVariables = new HashMap
     
      ();    uriVariables.put("phone", "151xxxxxxxx");    uriVariables.put("msg", "测试短信内容");    String result = restOperations.getForObject(url, String.class, uriVariables);}

服务器接收的时候你会发现，接收的该请求时没有参数的

正确使用

@Autowiredprivate RestOperations restOperations;public void test() throws Exception{    String url = "http://localhost:8080/test/sendSms?phone={phone}&msg={phone}";    Map
    
      uriVariables = new HashMap
     
      ();    uriVariables.put("phone", "151xxxxxxxx");    uriVariables.put("msg", "测试短信内容");    String result = restOperations.getForObject(url, String.class, uriVariables);}

等价于

@Autowiredprivate RestOperations restOperations;public void test() throws Exception{    String url = "http://localhost:8080/test/sendSms?phone={phone}&msg={phone}";    String result = restOperations.getForObject(url, String.class,  "151xxxxxxxx", "测试短信内容");}