Apache HttpClient 4.5设置超时时间

古城微笑少年丶 2023-10-18 19:39 118阅读 0赞

###### 前言 ######

这是个3.X的超时设置方法

HttpClient client = newHttpClient();
    client.setConnectionTimeout(30000); 
    client.setTimeout(30000);

还可以这样

HttpClient httpClient = newHttpClient(); 
    httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(3000);

4.X版本的超时设置(4.3之前版本)

HttpClient httpClient=newDefaultHttpClient();
    httpClient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT,2000);//连接时间
    httpClient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT,2000);//数据传输时间

4.3及以后版本的超时设置

CloseableHttpClient httpClient = HttpClients.createDefault();
    HttpGet httpGet = newHttpGet(url);
    RequestConfig config = RequestConfig.custom().setConnectTimeout(2000).setConnectionRequestTimeout(1000).setSocketTimeout(2000).build();
    httpGet.setConfig(config);

###### 示例 ######

下面以4.5版写一个例子：  
所需jar包

<dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
        <version>4.5.2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpmime</artifactId>
        <version>4.3.1</version>
    </dependency>

示例代码

package com.site.utils;
    
    import org.apache.commons.lang.StringUtils;
    import org.apache.http.HttpStatus;
    import org.apache.http.NameValuePair;
    import org.apache.http.client.config.RequestConfig;
    import org.apache.http.client.entity.UrlEncodedFormEntity;
    import org.apache.http.client.methods.CloseableHttpResponse;
    import org.apache.http.client.methods.HttpGet;
    import org.apache.http.client.methods.HttpPost;
    import org.apache.http.impl.client.CloseableHttpClient;
    import org.apache.http.impl.client.HttpClients;
    import org.apache.http.message.BasicNameValuePair;
    import org.apache.http.util.EntityUtils;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    
    import java.io.IOException;
    import java.util.LinkedList;
    import java.util.List;
    import java.util.Map;
    
    /**
     * 网络请求工具类
     */
    public class HttpUtil {
        
        private static Logger logger = LoggerFactory.getLogger(HttpUtil.class);    //日志记录
    
    
        /**
         * post请求
         *
         * @param url      url地址
         * @param paramMap 参数
         * @return
         */
        public static String httpPost(String url,Map<String, String> paramMap) {
        
            logger.info("post url-->" + url);
            try {
        
                CloseableHttpClient httpClient = HttpClients.createDefault();
                HttpPost httpPost = new HttpPost(url);
                //设置超时          
                RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(5000).setConnectionRequestTimeout(1000).setSocketTimeout(5000).build();
                httpPost.setConfig(requestConfig);
                //设置请求参数
                if (!paramMap.isEmpty()) {
        
                    List<NameValuePair> list = new LinkedList<>();
                    for (Map.Entry<String, String> entry : paramMap.entrySet()) {
        
                        list.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
                    }
                    UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(list, "UTF-8");
                    httpPost.setEntity(formEntity);
                }
                CloseableHttpResponse result = httpClient.execute(httpPost);
                String response = EntityUtils.toString(result.getEntity(), "UTF-8");
                logger.info("response-->" + response);
                return response;
            } catch (IOException e) {
        
                logger.error("post请求失败:", e);
            }
            return null;
        }
    
    
        /**
         * 发送get请求
         *
         * @param url 路径
         * @return
         */
        public static String httpGet(String url) {
        
            logger.info("get url-->" + url);
            try {
        
                CloseableHttpClient client = HttpClients.createDefault();
                //发送get请求
                HttpGet request = new HttpGet(url);
                //设置超时          
                RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(5000).setConnectionRequestTimeout(1000).setSocketTimeout(5000).build();
                request.setConfig(requestConfig);
                CloseableHttpResponse response = client.execute(request);
                if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
        
                    /**请求发送成功，并得到响应**/
                    String resp = EntityUtils.toString(response.getEntity(), "UTF-8");
                    logger.info("response-->" + resp);
                    return StringUtils.isBlank(resp) ? "OK" : resp;
                }
            } catch (IOException e) {
        
                logger.error("get请求提交失败:", e);
            }
            return null;
        }
    }

*  `setConnectTimeout` ：设置连接超时时间，单位毫秒。
 *  `setConnectionRequestTimeout` ：设置从connect Manager获取Connection 超时时间，单位毫秒。这个属性是新加的属性，因为目前版本是可以共享连接池的。
 *  `setSocketTimeout` ：请求获取数据的超时时间，单位毫秒。 如果访问一个接口，多少时间内无法返回数据，就直接放弃此次调用。

--------------------

参考：  
[https://www.cnblogs.com/warehouse/p/6879395.html][https_www.cnblogs.com_warehouse_p_6879395.html]  
[https://blog.csdn.net/z69183787/article/details/78039601/][https_blog.csdn.net_z69183787_article_details_78039601]

[https_www.cnblogs.com_warehouse_p_6879395.html]: https://www.cnblogs.com/warehouse/p/6879395.html
[https_blog.csdn.net_z69183787_article_details_78039601]: https://blog.csdn.net/z69183787/article/details/78039601/