用公司阿里云企業(yè)郵箱發(fā)送郵件，一直報(bào)javax.net.ssl.SSLHandshakeException: PKIX path building failed: sun.security.provider... 異常，顧名思義是安全驗(yàn)證問題，以下是生成安全證書后終于可以正常發(fā)送了。

1.拷貝下面代碼，將data里的郵箱服務(wù)器和端口換成自己的！我這里是阿里云"smtp.mxhichina.com:465"

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.security.KeyStore;
import java.security.MessageDigest;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.TrustManagerFactory;
import javax.net.ssl.X509TrustManager;
public class InstallCert {
??? public static void main(String[] args) throws Exception {
??????? String host;
??????? int port;
??????? char[] passphrase;
??????? String[] data = new String[]{"smtp.mxhichina.com:465"};
??????? if ((data.length == 1) || (data.length == 2)) {
??????????? String[] c = data[0].split(":");
??????????? host = c[0];
??????????? port = (c.length == 1) ? 443 : Integer.parseInt(c[1]);
??????????? String p = "changeit";
??????????? passphrase = p.toCharArray();
??????????? System.out.println("host->"+host);
??????????? System.out.println("port->"+port);
??????? } else {
??????????? System.out.println("Usage: java InstallCert <host>[: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);
??????? }
??? }
}

2.運(yùn)行程序，會(huì)有如下提示Enter certificate to add to trusted keystore or 'q' to quit: [1]

按1再按回車

3.然后在你的項(xiàng)目路徑下生成了一個(gè)jssecacerts文件

4.復(fù)制文件的路徑，在發(fā)送郵件代碼之前設(shè)置安全證書的位置，我的如下：

System.setProperty("javax.net.ssl.trustStore","E:\\ActionProject\\Email\\jssecacerts");

5.然后運(yùn)行發(fā)送郵件代碼就可以正常發(fā)送了！文章來源地址http://www.zghlxwxcb.cn/news/detail-543599.html

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