okhttp - HTTP失败: javax.net.ssl.SSLPeerUnverifiedException:找不到签名证书：

import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

public class OkHttpExample {
    public static void main(String[] args) throws Exception {
        // 创建一个自定义的TrustManager
        TrustManager[] trustAllCerts = new TrustManager[] {
                new X509TrustManager() {
                    @Override
                    public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
                    }

                    @Override
                    public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
                        // 自定义验证逻辑，可以在这里实现证书的验证
                    }

                    @Override
                    public X509Certificate[] getAcceptedIssuers() {
                        return new X509Certificate[0];
                    }
                }
        };

        // 创建一个SSLContext
        SSLContext sslContext = SSLContext.getInstance("TLS");
        sslContext.init(null, trustAllCerts, new java.security.SecureRandom());

        // 配置OkHttp客户端
        OkHttpClient client = new OkHttpClient.Builder()
                .sslSocketFactory(sslContext.getSocketFactory(), (X509TrustManager) trustAllCerts[0])
                .build();

        // 发送HTTP请求
        Request request = new Request.Builder()
                .url("https://example.com")
                .build();
        Response response = client.newCall(request).execute();

        // 处理响应
        System.out.println(response.body().string());
    }
}