問題現(xiàn)象：
Java Spring應(yīng)用發(fā)送數(shù)據(jù)報(bào)如下問題。
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原因分析:
用httpclient訪問https資源時(shí)，會(huì)出現(xiàn)異常，與環(huán)境也有關(guān)系，有些機(jī)器請(qǐng)求正常。
解決方案:
1.復(fù)制附錄代碼到文本文件中，改名為InstallCert.java。然后在命令行中執(zhí)行命令，編譯InstallCert.java：
javac InstallCert.java?2.再執(zhí)行以下命令：
java InstallCert www.baidu.com說明：網(wǎng)址處不需要輸入(https://)信息，比如 www.baidu.com，只需域名即可。
隨后服務(wù)器會(huì)返回認(rèn)證的主題，發(fā)行方，加密方式等信息。
3.在這里輸入1后，回車。
Enter certificate to add to trusted keystore or 'q' to quit: [1]
1在目錄下會(huì)生成文件jssecacerts，自此認(rèn)證過程結(jié)束。
替換證書：
1.windows系統(tǒng)：將生成的jssecacerts文件復(fù)制到 jdk的相應(yīng)路徑下即可。
windows系統(tǒng)一般需要首先找到j(luò)dk安裝路徑
D:\Java\jdk1.8.0_221\jre\lib\security
2.Linux系統(tǒng)：需要首先使用 scp 命令 將 jssecacerts 傳輸至服務(wù)器。
3.docker：jdk通常在這個(gè)地方
/usr/lib/jvm/java-1.8.0-openjdk-amd64/jre/lib/security/
/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/security/ (和上面其實(shí)一樣)
替換完后，重啟 docker 即可。
附錄：?文章來源：http://www.zghlxwxcb.cn/news/detail-573584.html
/*
* Copyright 2006 Sun Microsystems, Inc.? All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
*? - Redistributions of source code must retain the above copyright
*? ? notice, this list of conditions and the following disclaimer.
*
*? - Redistributions in binary form must reproduce the above copyright
*? ? notice, this list of conditions and the following disclaimer in the
*? ? documentation and/or other materials provided with the distribution.
*
*? - Neither the name of Sun Microsystems nor the names of its
*? ? contributors may be used to endorse or promote products derived
*? ? from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.? IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
import java.io.*;
import java.net.URL;
import java.security.*;
import java.security.cert.*;
import javax.net.ssl.*;
public class InstallCert {
public static void main(String[] args) throws Exception {
String host;
int port;
char[] passphrase;
if ((args.length == 1) || (args.length == 2)) {
String[] c = args[0].split(":");
host = c[0];
port = (c.length == 1) ? 443 : Integer.parseInt(c[1]);
String p = (args.length == 1) ? "changeit" : args[1];
passphrase = p.toCharArray();
} else {
System.out.println("Usage: java InstallCert [:port] [passphrase]");
return;
}
File file = new File("jssecacerts");
if (file.isFile() == false) {
char SEP = File.separatorChar;
File dir = new File(System.getProperty("java.home") + SEP + "lib" + SEP + "security");
file = new File(dir, "jssecacerts");
if (file.isFile() == false) {
file = new File(dir, "cacerts");
}
}
System.out.println("Loading KeyStore " + file + "...");
InputStream in = new FileInputStream(file);
KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
ks.load(in, passphrase);
in.close();
SSLContext context = SSLContext.getInstance("TLS");
TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
tmf.init(ks);
X509TrustManager defaultTrustManager = (X509TrustManager) tmf.getTrustManagers()[0];
SavingTrustManager tm = new SavingTrustManager(defaultTrustManager);
context.init(null, new TrustManager[]{tm}, null);
SSLSocketFactory factory = context.getSocketFactory();
System.out.println("Opening connection to " + host + ":" + port + "...");
SSLSocket socket = (SSLSocket) factory.createSocket(host, port);
socket.setSoTimeout(10000);
try {
System.out.println("Starting SSL handshake...");
socket.startHandshake();
socket.close();
System.out.println();
System.out.println("No errors, certificate is already trusted");
} catch (SSLException e) {
System.out.println();
e.printStackTrace(System.out);
}
X509Certificate[] chain = tm.chain;
if (chain == null) {
System.out.println("Could not obtain server certificate chain");
return;
}
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
System.out.println();
System.out.println("Server sent " + chain.length + " certificate(s):");
System.out.println();
MessageDigest sha1 = MessageDigest.getInstance("SHA1");
MessageDigest md5 = MessageDigest.getInstance("MD5");
for (int i = 0; i < chain.length; i++) {
X509Certificate cert = chain[i];
System.out.println(" " + (i + 1) + " Subject " + cert.getSubjectDN());
System.out.println("? Issuer? " + cert.getIssuerDN());
sha1.update(cert.getEncoded());
System.out.println("? sha1? ? " + toHexString(sha1.digest()));
md5.update(cert.getEncoded());
System.out.println("? md5? ? " + toHexString(md5.digest()));
System.out.println();
}
System.out.println("Enter certificate to add to trusted keystore or 'q' to quit: [1]");
String line = reader.readLine().trim();
int k;
try {
k = (line.length() == 0) ? 0 : Integer.parseInt(line) - 1;
} catch (NumberFormatException e) {
System.out.println("KeyStore not changed");
return;
}
X509Certificate cert = chain[k];
String alias = host + "-" + (k + 1);
ks.setCertificateEntry(alias, cert);
OutputStream out = new FileOutputStream("jssecacerts");
ks.store(out, passphrase);
out.close();
System.out.println();
System.out.println(cert);
System.out.println();
System.out.println("Added certificate to keystore 'jssecacerts' using alias '" + alias + "'");
}
private static final char[] HEXDIGITS = "0123456789abcdef".toCharArray();
private static String toHexString(byte[] bytes) {
StringBuilder sb = new StringBuilder(bytes.length * 3);
for (int b : bytes) {
b &= 0xff;
sb.append(HEXDIGITS[b >> 4]);
sb.append(HEXDIGITS[b & 15]);
sb.append(' ');
}
return sb.toString();
}
private static class SavingTrustManager implements X509TrustManager {
private final X509TrustManager tm;
private X509Certificate[] chain;
SavingTrustManager(X509TrustManager tm) {
this.tm = tm;
}
public X509Certificate[] getAcceptedIssuers() {
throw new UnsupportedOperationException();
}
public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
throw new UnsupportedOperationException();
}
public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
this.chain = chain;
tm.checkServerTrusted(chain, authType);
}
}
}另詳見：https://blog.csdn.net/chaishen10000/article/details/82992291文章來源地址http://www.zghlxwxcb.cn/news/detail-573584.html
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