部落格轉載https://blog.csdn.net/shenzhennba/article/details/83051853

1、Java開發我們常常需要和第三方系統進行通訊，通訊的方式有多種，如

（1）dubbo

（2）webservice

（3）微服務

（4）CloseableHttpClient等

2、以CloseableHttpClient為例 設定思路

　　首先請求配置物件RequestConfig設定超時時間

　　然後設定到 HttpGet 或 HttpPost 請求方法物件

3、以CloseableHttpClient為例

package com.gbm.common.util;

 
import org.apache.http.HttpEntity;
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;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.servlet.http.HttpServletRequest;
import java.io.IOException;

public class HttpUtil {
    private static Logger logger = LoggerFactory.getLogger(HttpUtil.class);
    public static String HttpGet(String Url, String token){
        String result
 
=null;
        CloseableHttpClient httpclient = HttpClients.createDefault();
        CloseableHttpResponse newresponse = null;
        try{
            RequestConfig requestConfig = RequestConfig.custom().setConnectionRequestTimeout(120000)
                    .setSocketTimeout(120000).setConnectTimeout(120000).build();  //設定2分鐘超時
            HttpGet httpget = new HttpGet(Url);
            httpget.setConfig(requestConfig);
            httpget.setHeader("token-Authorization", token);
            try{
                newresponse = httpclient.execute(httpget);
                HttpEntity entity = newresponse.getEntity();
                result = EntityUtils.toString(entity);
            }finally{
                newresponse.close();
            }
        }catch(Exception  e){
            logger.error("請求url:" + Url + "異常，異常資訊:" + e.getMessage());
        } finally {
            // 關閉連線,釋放資源
            try {
                httpclient.close();
            } catch (IOException e) {
                logger.error("關閉CloseableHttpClient異常，異常資訊:" + e.getMessage());
            }
        }
        return result;
    }
}