背景
经常会遇到服务器端限制访问速度，常见的是限制IP，这时候我们就需要设置代理IP来解除这种限制。
设置代理IP（多种实现方式）
设置系统属性方式
发送HTTP请求前通过设置JVM中的系统属性来实现
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| // HTTP/HTTPS Proxy
System.setProperty("http.proxyHost", yourProxyIp);
System.setProperty("http.proxyPort", yourProxyProt);
System.setProperty("https.proxyHost", yourProxyIp);
System.setProperty("https.proxyPort", yourProxyProt);
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使用HttpClient时设置代理
直接引用HttpClient官方的示例代码进行说明
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| import org.apache.http.HttpHost;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
/**
* How to send a request via proxy.
*
* @since 4.0
*/
public class ClientExecuteProxy {
public static void main(String[] args)throws Exception {
CloseableHttpClient httpclient = HttpClients.createDefault();
try {
HttpHost target = new HttpHost("httpbin.org", 443, "https");
HttpHost proxy = new HttpHost("127.0.0.1", 8080, "http");
RequestConfig config = RequestConfig.custom()
.setProxy(proxy)
.build();
HttpGet request = new HttpGet("/");
request.setConfig(config);
System.out.println("Executing request " + request.getRequestLine() + " to " + target + " via " + proxy);
CloseableHttpResponse response = httpclient.execute(target, request);
try {
System.out.println("----------------------------------------");
System.out.println(response.getStatusLine());
System.out.println(EntityUtils.toString(response.getEntity()));
} finally {
response.close();
}
} finally {
httpclient.close();
}
}
}
|