java.io.IOException:尝试加载url openstream java时密钥库格式无效

我正在尝试从URL加载JSON，这在这里的另一个答案中是必要的

然而，我试图使用罗兰给出的答案，而这本身并不起作用。JSON库正在正常工作并正确导入，但我在尝试打开URL流时遇到以下错误：

Exception in thread "main" java.net.SocketException: java.security.NoSuchAlgorithmException: Error constructing implementation (algorithm: Default, provider: SunJSSE, class: sun.security.ssl.SSLContextImpl$DefaultSSLContext)
at javax.net.ssl.DefaultSSLSocketFactory.throwException(SSLSocketFactory.java:248)
at javax.net.ssl.DefaultSSLSocketFactory.createSocket(SSLSocketFactory.java:255)
at sun.net.www.protocol.https.HttpsClient.createSocket(HttpsClient.java:405)
at sun.net.NetworkClient.doConnect(NetworkClient.java:162)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:264)
at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:367)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1105)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:999)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1513)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1441)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
at java.net.URL.openStream(URL.java:1038)
at JsonReader.readJsonFromUrl(JsonReader.java:24)
at JsonReader.main(JsonReader.java:36)
Caused by: java.security.NoSuchAlgorithmException: Error constructing implementation (algorithm: Default, provider: SunJSSE, class: sun.security.ssl.SSLContextImpl$DefaultSSLContext)
at java.security.Provider$Service.newInstance(Provider.java:1617)
at sun.security.jca.GetInstance.getInstance(GetInstance.java:236)
at sun.security.jca.GetInstance.getInstance(GetInstance.java:164)
at javax.net.ssl.SSLContext.getInstance(SSLContext.java:156)
at javax.net.ssl.SSLContext.getDefault(SSLContext.java:96)
at javax.net.ssl.SSLSocketFactory.getDefault(SSLSocketFactory.java:122)
at javax.net.ssl.HttpsURLConnection.getDefaultSSLSocketFactory(HttpsURLConnection.java:332)
at javax.net.ssl.HttpsURLConnection.<init>(HttpsURLConnection.java:289)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.<init>(HttpsURLConnectionImpl.java:85)
at sun.net.www.protocol.https.Handler.openConnection(Handler.java:62)
at sun.net.www.protocol.https.Handler.openConnection(Handler.java:57)
at java.net.URL.openConnection(URL.java:972)
... 3 more
Caused by: java.io.IOException: Invalid keystore format
at sun.security.provider.JavaKeyStore.engineLoad(JavaKeyStore.java:658)
at sun.security.provider.JavaKeyStore$JKS.engineLoad(JavaKeyStore.java:56)
at sun.security.provider.KeyStoreDelegator.engineLoad(KeyStoreDelegator.java:225)
at sun.security.provider.JavaKeyStore$DualFormatJKS.engineLoad(JavaKeyStore.java:70)
at java.security.KeyStore.load(KeyStore.java:1445)
at sun.security.ssl.TrustManagerFactoryImpl.getCacertsKeyStore(TrustManagerFactoryImpl.java:226)
at sun.security.ssl.SSLContextImpl$DefaultSSLContext.getDefaultTrustManager(SSLContextImpl.java:767)
at sun.security.ssl.SSLContextImpl$DefaultSSLContext.<init>(SSLContextImpl.java:733)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
at java.security.Provider$Service.newInstance(Provider.java:1595)
... 14 more

---

密码人在哪里？你的https问题，而不是发布的代码。可能是损坏的cacerts或通过-Djavax.net.ssl.truststore传递的错误自定义信任库导致了此错误谢谢，你知道这是否有一个简单的修复程序或者需要重新安装吗？我已经从/etc/ssl/certs/Java中删除了Java cacerts，并运行了更新脚本/usr/sbin/update ca certificates。我现在收到一个不同的错误：线程“main”中出现异常javax.net.ssl.SSLException:java.lang.RuntimeException:意外错误：java.security.invalidalgorithParameterException:trustAnchors参数必须为非空您没有指定您使用的java版本、操作系统，这非常重要。没有这些信息，任何人都无法复制这个问题并回答您。我想你的java设置被破坏了，我认为只有一种明智的方法可以修复它——从oracle.com下载jdk，安装它并用jdk运行你的程序。代码人在哪里？你的https问题，而不是发布的代码。可能是损坏的cacerts或通过-Djavax.net.ssl.truststore传递的错误自定义信任库导致了此错误谢谢，你知道这是否有一个简单的修复程序或者需要重新安装吗？我已经从/etc/ssl/certs/Java中删除了Java cacerts，并运行了更新脚本/usr/sbin/update ca certificates。我现在收到一个不同的错误：线程“main”中出现异常javax.net.ssl.SSLException:java.lang.RuntimeException:意外错误：java.security.invalidalgorithParameterException:trustAnchors参数必须为非空您没有指定您使用的java版本、操作系统，这非常重要。没有这些信息，任何人都无法复制这个问题并回答您。我想您的java设置已经被破坏，我认为只有一种明智的方法可以修复它——从oracle.com下载jdk，安装它并使用该jdk运行您的程序。

package so4308554;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URL;
import java.nio.charset.Charset;

import org.json.JSONException;
import org.json.JSONObject;

public class JsonReader {

  private static String readAll(Reader rd) throws IOException {
    StringBuilder sb = new StringBuilder();
    int cp;
    while ((cp = rd.read()) != -1) {
      sb.append((char) cp);
    }
    return sb.toString();
  }

  public static JSONObject readJsonFromUrl(String url) throws IOException, JSONException {
    InputStream is = new URL(url).openStream();
    try {
      BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8")));
      String jsonText = readAll(rd);
      JSONObject json = new JSONObject(jsonText);
      return json;
    } finally {
      is.close();
    }
  }

  public static void main(String[] args) throws IOException, JSONException {
    JSONObject json = readJsonFromUrl("https://graph.facebook.com/19292868552");
    System.out.println(json.toString());
    System.out.println(json.get("id"));
  }
}