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我有以下用 Java 编写的源代码，它创建到远程服务器的 https 连接并向 http 服务器发出一些请求：

import java.io.FileInputStream;
import java.security.KeyStore;
import java.security.cert.Certificate;
import java.util.*;
import java.security.cert.X509Certificate;
import java.security.*;

import javax.net.ssl.SSLContext;

import org.apache.http.HttpEntity;
import org.apache.http.conn.ssl.TrustSelfSignedStrategy;
import javax.net.ssl.SSLContext;
import org.apache.http.conn.ssl.SSLContexts;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.util.EntityUtils;

public class trustStore {
    public static void main(String[] args) throws Exception {

    char[] password = "OQASNRati6c=".toCharArray();

    FileInputStream fIn = new FileInputStream("lamkin.p12");
    KeyStore keystore = KeyStore.getInstance("PKCS12");
    keystore.load(fIn, password);
    SSLContext sslcontext = SSLContexts.custom().loadTrustMaterial(keystore, new TrustSelfSignedStrategy()).build();
    SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext, new String[] { "TLSv1" }, null, SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
    CloseableHttpClient httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).build();

    try {
        HttpGet httpget = new HttpGet("https://172.20.175.1/kani/");
        System.out.println("executeng request" + httpget.getRequestLine());
        CloseableHttpResponse response = httpclient.execute(httpget);

        try {

        HttpEntity entity = response.getEntity();
        System.out.println("-------------------------------");
        System.out.println(response.getStatusLine());

        if (entity != null) {
            System.out.println("Response content lingth: " + entity.getContentLength());
        }
        EntityUtils.consume(entity);
        } finally {
        response.close();
        }
    } finally {
        httpclient.close();
    }
    }
}

我尝试对 android 平台做同样的事情，但我遇到了问题：如何在 android 应用程序中发布下一个代码字符串：

SSLContext sslcontext = SSLContexts.custom().loadTrustMaterial(keystore, new TrustSelfSignedStrategy()).build();
        SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext, new String[] { "TLSv1" }, null, SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
        CloseableHttpClient httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).build();

我在 Android SDK CloseableHttpClient、SSLContexts、SSLConnectionSOcketFactory 中没有找到。谁能告诉我什么是 SSLSocketFactory？为什么需要它？

更新：

我尝试以下代码行：

        FileInputStream fIn = new FileInputStream("lamkin.p12");
        KeyStore keyStore = KeyStore.getInstance("PKCS12");
        keyStore.load(fIn, password);


        TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
        tmf.init(keyStore);

        KeyManagerFactory kmf = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
        kmf.init(keyStore, password);

        SSLContext context = SSLContext.getInstance("TLS");
        context.init(null, tmf.getTrustManagers(), null);

        URL url = new URL("https://kompot.petrsu.ru/kani/");
        HttpsURLConnection urlConnection = (HttpsURLConnection)url.openConnection();
        urlConnection.setSSLSocketFactory(context.getSocketFactory());
        InputStream in = urlConnection.getInputStream();

它不适用于 Ubuntu 操作系统，出现以下异常：

javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

我在 Android 操作系统上做了同样的事情，然后我得到了以下异常：

04-11 11:35:30.123: W/System.err(4880): javax.net.ssl.SSLHandshakeException:
java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
04-11 11:35:30.133: W/System.err(4880):     at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:401)
04-11 11:35:30.133: W/System.err(4880):     at libcore.net.http.HttpConnection.setupSecureSocket(HttpConnection.java:209)
04-11 11:35:30.133: W/System.err(4880):     at libcore.net.http.HttpsURLConnectionImpl$HttpsEngine.makeSslConnection(HttpsURLConnectionImpl.java:478)
04-11 11:35:30.133: W/System.err(4880):     at libcore.net.http.HttpsURLConnectionImpl$HttpsEngine.connect(HttpsURLConnectionImpl.java:433)
etc...

可能有什么问题？

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