我正在尝试使用java获取站点的内容。但是得到pxip错误

我正在尝试使用java获取站点的内容。像这样

    package javaTests;

    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.net.URL;

    import javax.net.ssl.HttpsURLConnection;

public class PrintContent {
    public static void main(String[] args) throws Exception {
        String https_url = "https://api.precharge.net/charge";
        URL url;
        url = new URL(https_url);
        HttpsURLConnection con = (HttpsURLConnection)url.openConnection();

        if(con!=null){
        try {

           System.out.println("****** Content of the URL ********");            
           BufferedReader br = 
            new BufferedReader(
                new InputStreamReader(con.getInputStream()));

           String input;

           while ((input = br.readLine()) != null){
              System.out.println(input);
           }
           br.close();

        } catch (IOException e) {
           e.printStackTrace();
        }

             }


    }
}

但我也有例外

javax.net.ssl.SSLHandshakeException:sun.security.validator.ValidatorException:PKIX路径生成失败：sun.security.provider.certpath.SunCertPathBuilderException:找不到请求目标的有效证书路径

请就如何解决这个问题给出一些建议。谢谢你

我还尝试将证书复制到java的安全文件夹中。但它不起作用。

---

还尝试了installcerticate.java类。

如果在信任库中安装证书失败，可以使用此技巧禁用SSL验证。不应在生产环境中使用

package javaTests;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.security.cert.X509Certificate;
import java.security.SecureRandom;

public class PrintContent {
  public static void main(String[] args) throws Exception {
    String https_url = "https://api.precharge.net/charge";
    URL url;
    url = new URL(https_url);

    HttpsURLConnection con = (HttpsURLConnection) url.openConnection();

    if (con != null) {
      try {

        System.out.println("****** Content of the URL ********");
        BufferedReader br =
            new BufferedReader(
                new InputStreamReader(con.getInputStream()));

        String input;

        while ((input = br.readLine()) != null) {
          System.out.println(input);
        }
        br.close();

      } catch (IOException e) {
        e.printStackTrace();
      }
    }
  }

  public void disableCertificates() {
    TrustManager[] trustAllCerts = new TrustManager[] {
        new X509TrustManager() {
          @Override
          public X509Certificate[] getAcceptedIssuers() {
            System.out.println("Warning! SSL validation has been disabled!");
            return null;
          }

          @Override
          public void checkServerTrusted(X509Certificate[] certs, String authType) {
            System.out.println("Warning! SSL validation has been disabled!");
          }

          @Override
          public void checkClientTrusted(X509Certificate[] certs, String authType) {
            System.out.println("Warning! SSL validation has been disabled!");
          }
        }
    };
    try {
      SSLContext sc = SSLContext.getInstance("SSL");
      sc.init(null, trustAllCerts, new SecureRandom());
      HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
    } catch (Exception e) {
      System.out.println("Failed to disable SSL validation," + e.getMessage());
    }
  }
}

---

我不想把它标为复制品，因为我对这个主题了解不多，但你看过：@TomJonckheere。我不知道如何使用它。我把它作为一门独立的课程来写。不在服务器中。不确定此帮助是否正确，链接问题中的链接是否有帮助？您好@raghavendra我执行了相同的程序，但是我没有得到您上面提到的任何异常。我得到了代码的未知主机异常。因此我放置了google.com URL，而不是您的URL。代码运行良好。它为我提供了html内容。@bhadram for google它也在我的系统中运行。如何在我的系统中安装cer证书