yml配置文件

#The config for HttpClient
http:
  maxTotal: 300
  defaultMaxPerRoute: 50
  connectTimeout: 1000
  connectionRequestTimeout: 500
  socketTimeout: 5000
  staleConnectionCheckEnabled: true

配置类

package cn.ycz.vxpay.config;

import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.conn.HttpClientConnectionManager;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.web.client.RestTemplate;

import java.nio.charset.Charset;
import java.util.List;

/**
 * @author: ycz
 * @create: 2019-09-27 10:50
 * @description: HttpClient配置类
 **/
@Configuration
@ConfigurationProperties(prefix = "http", ignoreUnknownFields = true)
public class HttpClientConfig {

    private Integer maxTotal;// 最大连接

    private Integer defaultMaxPerRoute;// 每个host的最大连接

    private Integer connectTimeout;// 连接超时时间

    private Integer connectionRequestTimeout;// 请求超时时间

    private Integer socketTimeout;// 响应超时时间

    /**
     * HttpClient连接池
     * @return
     */
    @Bean
    public HttpClientConnectionManager httpClientConnectionManager() {
        PoolingHttpClientConnectionManager connectionManager = new PoolingHttpClientConnectionManager();
        connectionManager.setMaxTotal(maxTotal);
        connectionManager.setDefaultMaxPerRoute(defaultMaxPerRoute);
        return connectionManager;
    }

    /**
     * 注册RequestConfig
     * @return
     */
    @Bean
    public RequestConfig requestConfig() {
        return RequestConfig.custom().setConnectTimeout(connectTimeout)
                .setConnectionRequestTimeout(connectionRequestTimeout).setSocketTimeout(socketTimeout)
                .build();
    }

    /**
     * 注册HttpClient
     * @param manager
     * @param config
     * @return
     */
    @Bean
    public HttpClient httpClient(HttpClientConnectionManager manager, RequestConfig config) {
        return HttpClientBuilder.create().setConnectionManager(manager).setDefaultRequestConfig(config)
                .build();
    }

    @Bean
    public ClientHttpRequestFactory requestFactory(HttpClient httpClient) {
        return new HttpComponentsClientHttpRequestFactory(httpClient);
    }
    /**
     * 使用HttpClient来初始化一个RestTemplate
     * @param requestFactory
     * @return
     */
    @Bean
    public RestTemplate restTemplate(ClientHttpRequestFactory requestFactory) {
        RestTemplate template = new RestTemplate(requestFactory);

        List<HttpMessageConverter<?>> list = template.getMessageConverters();
        for (HttpMessageConverter<?> mc : list) {
            if (mc instanceof StringHttpMessageConverter) {
                ((StringHttpMessageConverter) mc).setDefaultCharset(Charset.forName("UTF-8"));
            }
        }
        return template;
    }

    public Integer getMaxTotal() {
        return maxTotal;
    }

    public void setMaxTotal(Integer maxTotal) {
        this.maxTotal = maxTotal;
    }

    public Integer getDefaultMaxPerRoute() {
        return defaultMaxPerRoute;
    }

    public void setDefaultMaxPerRoute(Integer defaultMaxPerRoute) {
        this.defaultMaxPerRoute = defaultMaxPerRoute;
    }

    public Integer getConnectTimeout() {
        return connectTimeout;
    }

    public void setConnectTimeout(Integer connectTimeout) {
        this.connectTimeout = connectTimeout;
    }

    public Integer getConnectionRequestTimeout() {
        return connectionRequestTimeout;
    }

    public void setConnectionRequestTimeout(Integer connectionRequestTimeout) {
        this.connectionRequestTimeout = connectionRequestTimeout;
    }

    public Integer getSocketTimeout() {
        return socketTimeout;
    }

    public void setSocketTimeout(Integer socketTimeout) {
        this.socketTimeout = socketTimeout;
    }

}

使用类

package cn.ycz.vxpay.untils;

import org.apache.http.NameValuePair;
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.client.utils.URIBuilder;
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 java.net.URLDecoder;
import java.net.URLEncoder;
import java.net.URI;
import java.util.LinkedList;
import java.util.List;


/**
 * @author: ycz
 * @create: 2019-09-27 11:05
 * @description: 远程请求
 **/
public class GetSocre {
    public static void getNameList() throws Exception {
        // 创建Httpclient对象
        CloseableHttpClient httpclient = HttpClients.createDefault();
//        surname = URLEncoder.encode(surname,"gb2312");
//        sex = URLEncoder.encode(sex,"gb2312");

        // 创建URI对象，并且设置请求参数
        URI uri = new URIBuilder("http://www.baidu.com").build();
        // 创建http Post请求
        HttpPost httpPost = new HttpPost(uri);
        httpPost.setHeader("User-Agent","Mozilla/5.0 (Windows NT 10.0; WOW64; rv:61.0) Gecko/20100101 Firefox/61.0");
        httpPost.setHeader("Content-Type","application/x-www-form-urlencoded");

        CloseableHttpResponse response = null;
        try {
            // 执行请求
            response = httpclient.execute(httpPost);
            // 判断返回状态是否为200
            if (response.getStatusLine().getStatusCode() == 200) {
                // 解析响应数据
                String content = EntityUtils.toString(response.getEntity(), "UTF-8");
                System.out.println(content);
            }else{
                String content = EntityUtils.toString(response.getEntity(), "UTF-8");
                System.out.println("ERROR:"+content);
            }
        } finally {
            if (response != null) {
                response.close();
            }
            httpclient.close();
        }
    }


}