利用HttpURLConnection实现https 请求
时间: 2024-02-21 15:10:35 浏览: 21
要利用Java的HttpURLConnection类实现HTTPS请求,可以通过以下步骤实现:
1. 创建一个URL对象,指向要请求的HTTPS地址。
2. 调用URL对象的openConnection()方法,获取URLConnection对象。
3. 将URLConnection对象转换为HttpsURLConnection对象。
4. 设置HttpsURLConnection对象的一些连接属性,例如SSLContext、HostnameVerifier等。
5. 发送请求并获取响应。
下面是一个示例代码:
```java
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
public class HttpsClient {
public static void main(String[] args) throws Exception {
String httpsURL = "https://example.com";
URL myUrl = new URL(httpsURL);
HttpURLConnection conn = (HttpURLConnection)myUrl.openConnection();
if (conn instanceof HttpsURLConnection) {
HttpsURLConnection httpsConn = (HttpsURLConnection)conn;
SSLContext sslContext = SSLContext.getInstance("TLS");
sslContext.init(null, new TrustManager[] { new X509TrustManager() {
public void checkClientTrusted(java.security.cert.X509Certificate[] chain, String authType) {}
public void checkServerTrusted(java.security.cert.X509Certificate[] chain, String authType) {}
public java.security.cert.X509Certificate[] getAcceptedIssuers() { return new java.security.cert.X509Certificate[]{}; }
} }, new java.security.SecureRandom());
httpsConn.setSSLSocketFactory(sslContext.getSocketFactory());
httpsConn.setHostnameVerifier((hostname, session) -> true);
}
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String input;
while ((input = br.readLine()) != null) {
System.out.println(input);
}
br.close();
}
}
```
在这个示例中,我们首先创建了一个URL对象,然后使用openConnection()方法获取URLConnection对象。由于我们要访问的是HTTPS地址,因此我们需要将URLConnection对象转换为HttpsURLConnection对象,并设置SSLContext和HostnameVerifier。最后,我们发送请求并读取响应。需要注意的是,由于我们使用了自定义的TrustManager和HostnameVerifier,因此它不会验证证书,因此在实际生产环境中需要谨慎使用。