CloseableHttpClient设置超时

Posted 2022-12-04 muxi0407

Java开发我们常常需要和第三方系统进行通信，通信的方式有多种，如dubbo方式，webservice，微服务和CloseableHttpClient等方式，常涉及到超时问题，这里主要说的是CloseableHttpClient的超时设置以及超市了的异常处理；一般思路就是，

1，定义超时的时间，这个一般作为一个配置项，方便随时修改；

2，请求配置对象RequestConfig设置超时时间，然后设置到 HttpGet 或 HttpPost 请求方法对象；

3，使用CloseableHttpClient对象执行相应的请求方法，同时使用 try...catch... 捕获异常，对于超时可通过 SocketTimeoutExcetption 和 ConnectTimeoutException捕获异常；

例如下面简要例子（相应的jar自行网上查找）；

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("请求连接超时");
catch (Exception ex)
System.out.println("请求异常，异常信息：" + ex.getMessage());