使用代理伺服器最簡單的方式就是，指定一個預設的proxy引數。

HttpHost proxy = new HttpHost("someproxy", 8080);

DefaultProxyRoutePlanner routePlanner = new DefaultProxyRoutePlanner(proxy);

CloseableHttpClient httpclient = HttpClients.custom()

        .setRoutePlanner(routePlanner)

        .build();

我們也可以讓HttpClient去使用jre的代理伺服器。

SystemDefaultRoutePlanner routePlanner = new SystemDefaultRoutePlanner(

        ProxySelector.getDefault());

CloseableHttpClient httpclient = HttpClients.custom()

        .setRoutePlanner(routePlanner)

        .build();

又或者，我們也可以手動配置RoutePlanner，這樣就可以完全控制Http路由的過程。

HttpRoutePlanner routePlanner = new HttpRoutePlanner() {

 

    public HttpRoute determineRoute(

            HttpHost target,

            HttpRequest request,

            HttpContext context) throws HttpException {

        return new HttpRoute(target, null,  new HttpHost("someproxy", 8080),

                "https".equalsIgnoreCase(target.getSchemeName()));

    }

 

};

CloseableHttpClient httpclient = HttpClients.custom()

        .setRoutePlanner(routePlanner)

        .build();

    }

}
 

可以封裝成一個方法來獲取一個proxyHttpClient例項：

public static CloseableHttpClient getProxyHttpClient(IP ip){
		HttpHost proxy=new HttpHost(ip.getHost(),ip.getPort());
		DefaultProxyRoutePlanner routePlanner = new DefaultProxyRoutePlanner(proxy);
		CloseableHttpClient proxyHttpClient=HttpClients.custom().setRoutePlanner(routePlanner).build();
		return proxyHttpClient;
	}