httpclient发送https请求 并且配置连接池

使用HttpClient发送HTTPS请求并配置连接池，可以按照以下步骤进行：

1. 创建SSLContext对象，用于HTTPS连接的安全认证。

SSLContext sslContext = SSLContexts.createSystemDefault();

2. 创建ConnectionSocketFactory对象，用于连接池中的连接创建。

SSLConnectionSocketFactory sslConnectionSocketFactory = new SSLConnectionSocketFactory(sslContext);

3. 创建HttpClientConnectionManager对象，用于管理连接池中的连接。

PoolingHttpClientConnectionManager poolingHttpClientConnectionManager = new PoolingHttpClientConnectionManager(Arrays.asList(sslConnectionSocketFactory));
poolingHttpClientConnectionManager.setMaxTotal(200);//设置最大连接数
poolingHttpClientConnectionManager.setDefaultMaxPerRoute(100);//设置每个路由最大连接数

4. 创建HttpClient对象，并设置连接池管理器。

CloseableHttpClient httpClient = HttpClients.custom()
        .setConnectionManager(poolingHttpClientConnectionManager)
        .build();

5. 创建HttpPost对象，设置请求参数，并执行请求。

HttpPost httpPost = new HttpPost("https://example.com/path");
httpPost.setEntity(new StringEntity("Hello, world!"));
CloseableHttpResponse httpResponse = httpClient.execute(httpPost);

完整的示例代码如下：

import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.ssl.SSLContexts;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import javax.net.ssl.SSLContext;
import java.util.Arrays;
import java.io.IOException;

public class HttpClientExample {
    public static void main(String[] args) throws IOException {
        SSLContext sslContext = SSLContexts.createSystemDefault();
        SSLConnectionSocketFactory sslConnectionSocketFactory = new SSLConnectionSocketFactory(sslContext);
        PoolingHttpClientConnectionManager poolingHttpClientConnectionManager = new PoolingHttpClientConnectionManager(Arrays.asList(sslConnectionSocketFactory));
        poolingHttpClientConnectionManager.setMaxTotal(200);
        poolingHttpClientConnectionManager.setDefaultMaxPerRoute(100);
        CloseableHttpClient httpClient = HttpClients.custom()
                .setConnectionManager(poolingHttpClientConnectionManager)
                .build();
        HttpPost httpPost = new HttpPost("https://example.com/path");
        httpPost.setEntity(new StringEntity("Hello, world!"));
        CloseableHttpResponse httpResponse = httpClient.execute(httpPost);
        System.out.println(httpResponse.getStatusLine().getStatusCode());
        httpResponse.close();
        httpClient.close();
    }
}