CloseableHttpClient設置超時

Java開發我們常常需要和第三方系統進行通信，通信的方式有多種，如dubbo方式，webservice，微服務和CloseableHttpClient等方式，常涉及到超時問題，這里主要說的是CloseableHttpClient的超時設置以及超市了的異常處理；一般思路就是，

1，定義超時的時間，這個一般作為一個配置項，方便隨時修改；

2，請求配置對象RequestConfig設置超時時間，然后設置到 HttpGet 或 HttpPost 請求方法對象；

3，使用CloseableHttpClient對象執行相應的請求方法，同時使用 try...catch... 捕獲異常，對於超時可通過 SocketTimeoutExcetption 和 ConnectTimeoutException捕獲異常；

例如下面簡要例子（相應的jar自行網上查找）；

package com.xxx.yyy.kkk;

import org.apache.http.client.ClientProtocolException;
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.conn.ConnectTimeoutException;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.BasicHttpClientConnectionManager;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;

import java.io.IOException;
import java.net.SocketTimeoutException;

public class HttpClient001 {

public void getXXX() throws Exception {
CloseableHttpClient httpclient = HttpClients.createDefault();
RequestConfig requestConfig = RequestConfig.custom().setConnectionRequestTimeout(1000)
.setSocketTimeout(1000).setConnectTimeout(1000).build();
HttpGet httpGet = new HttpGet("http://www.xxx.com");
httpGet.setConfig(requestConfig);
try {
CloseableHttpResponse response = httpclient.execute(httpGet);
//....do more work...
} catch (SocketTimeoutExcetption | ConnectTimeoutException ex) {
System.out.println("請求連接超時");
} catch (Exception ex) {
System.out.println("請求異常，異常信息：" + ex.getMessage());
}
}