SpringBoot中RestTemplate使用proxy请求接口设置

一、使用场景

1. 爬虫请求更换IP
2. Fiddler抓取Java代码的Http请求（RestTemplate）

二、配置

配置RestTemplate

@Configuration
public class RestTemplateConfig {

    @Bean
    public RestTemplate restTemplate(ClientHttpRequestFactory factory) {
        return new RestTemplate(factory);
    }

    @Bean
    public ClientHttpRequestFactory simpleClientHttpRequestFactory() {
        SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
        factory.setReadTimeout(50000);//ms
        factory.setConnectTimeout(150000);//ms
        return factory;
    }
}

封装接口

@Slf4j
public class RestUtil {
  /**
     * RestAPI 调用器
     */
    private final static RestTemplate RT;

    static {
        SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory();
        requestFactory.setConnectTimeout(300000);
        requestFactory.setReadTimeout(300000);
        RT = new RestTemplate(requestFactory);
        // 解决乱码问题
        RT.getMessageConverters().set(1, new StringHttpMessageConverter(StandardCharsets.UTF_8));
    }

    public static RestTemplate getRestTemplate() {
        return RT;
    }

    public static void setRestTemplate(String ip, Integer port) {
        SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
        factory.setReadTimeout(50000);//ms
        factory.setConnectTimeout(150000);//ms
        factory.setProxy(new Proxy(Proxy.Type.HTTP, new InetSocketAddress(ip, port)));
        RT.setRequestFactory(factory);
        // 解决乱码问题
        RT.getMessageConverters().set(1, new StringHttpMessageConverter(StandardCharsets.UTF_8));
    }
}

三、具体使用

在每次使用之前，使用RestUtil.setRestTemplate("203.66.65.6",3128)方法进行ip和端口的更换