java config方式

@Configuration
public class AppConfig{
    @Bean
    public RestTemplate customRestTemplate(){
        HttpComponentsClientHttpRequestFactory httpRequestFactory = new HttpComponentsClientHttpRequestFactory();
        httpRequestFactory.setConnectionRequestTimeout(3000);
        httpRequestFactory.setConnectTimeout(3000);
        httpRequestFactory.setReadTimeout(3000);

        return new RestTemplate(httpRequestFactory);
    }
}

配置文件指定

custom.rest.connection.connection-request-timeout=3000
custom.rest.connection.connect-timeout=3000
custom.rest.connection.read-timeout=3000

指定

@Configuration
public class AppConfig{
    @Bean
    @ConfigurationProperties(prefix = "custom.rest.connection")
    public HttpComponentsClientHttpRequestFactory customHttpRequestFactory() {
        return new HttpComponentsClientHttpRequestFactory();
    }

    @Bean
    public RestTemplate customRestTemplate(){
        return new RestTemplate(customHttpRequestFactory());
    }
}

doc

• Spring RestTemplate timeout