apache httpclient发送http和https请求代码

以下是使用 Apache HttpClient 发送 HTTP 和 HTTPS 请求的示例代码：

1. 发送 HTTP 请求

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClients;

public class HttpClientExample {
    public static void main(String[] args) throws Exception {
        HttpClient httpClient = HttpClients.createDefault();
        HttpGet httpGet = new HttpGet("http://www.example.com");
        HttpResponse httpResponse = httpClient.execute(httpGet);
        System.out.println(httpResponse.getStatusLine().getStatusCode()); // 打印响应状态码
    }
}

2. 发送 HTTPS 请求

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLContextBuilder;
import org.apache.http.impl.client.HttpClients;

import javax.net.ssl.SSLContext;

public class HttpClientExample {
    public static void main(String[] args) throws Exception {
        SSLContext sslContext = new SSLContextBuilder()
                .loadTrustMaterial(null, (certificate, authType) -> true)
                .build();
        HttpClient httpClient = HttpClients.custom()
                .setSSLContext(sslContext)
                .setSSLHostnameVerifier(new NoopHostnameVerifier())
                .build();
        HttpGet httpGet = new HttpGet("https://www.example.com");
        HttpResponse httpResponse = httpClient.execute(httpGet);
        System.out.println(httpResponse.getStatusLine().getStatusCode()); // 打印响应状态码
    }
}

注意事项：

- HTTPS 请求需要设置 SSLContext 和 SSLHostnameVerifier；
- SSLContext 的 TrustManager 应该接受所有证书，这不安全，建议修改为验证证书；
- SSLHostnameVerifier 应该使用严格的 HostnameVerifier，这里为了简单只使用了 NoopHostnameVerifier。