Spring配置类注解@Bean

用在方法上，生命当前方法返回值为bean，替代xml

    @Bean(name = "httpsTemplate")
    public RestTemplate httpsRestTemplate() throws KeyStoreException, NoSuchAlgorithmException, KeyManagementException {

        HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory(getHttpClient());
        requestFactory.setConnectTimeout(60000);
        requestFactory.setReadTimeout(60000);
        RestTemplate restTemplate = new RestTemplate(requestFactory);
        List<HttpMessageConverter<?>> converters = new ArrayList<>();
        converters.add(new ResourceHttpMessageConverter());
        converters.add(new StringHttpMessageConverter());
        restTemplate.setMessageConverters(converters);
        return restTemplate;
    }