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<TITLE>Exporting a Certificate to a File (Java Developers Almanac Example)
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    <A HREF="../java.security.cert/pkg.html">java.security.cert</A><font color="#666666" class="xsmall-font">
        &nbsp;[9 examples]
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        &gt;
        <B><A HREF="../java.security.cert/pkg.html#Certificates">Certificates</A></B><font color="#666666" class="xsmall-font">
            &nbsp;[5 examples]
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  <h3>e224. Exporting a Certificate to a File</h3>

See also <a href="../java.security.cert/ImportCert.html" class="eglink"><b>e225</b> Importing a Certificate from a File</a>.

<pre>    // This method writes a certificate to a file. If binary is false, the
    // certificate is base64 encoded.
    public static void export(java.security.cert.Certificate cert, File file, boolean binary) {
        try {
            // Get the encoded form which is suitable for exporting
            byte[] buf = cert.getEncoded();
    
            FileOutputStream os = new FileOutputStream(file);
            if (binary) {
                // Write in binary form
                os.write(buf);
            } else {
                // Write in text form
                Writer wr = new OutputStreamWriter(os, Charset.forName("UTF-8"));
                wr.write("-----BEGIN CERTIFICATE-----\n");
                wr.write(new sun.misc.BASE64Encoder().encode(buf));
                wr.write("\n-----END CERTIFICATE-----\n");
                wr.flush();
            }
            os.close();
        } catch (CertificateEncodingException e) {
        } catch (IOException e) {
        }
    }
</pre>
If the certificate is in the key store, it can exported using <code>keytool</code>:

<pre>    // Export in binary
    &gt; keytool -storepass <font color="#0066ff"><i>my-keystore-password</i></font> -alias <font color="#0066ff"><i>myalias</i></font> -export -file <font color="#0066ff"><i>outfilename.cer</i></font>
    
    // Export in text format
    &gt; keytool -storepass <font color="#0066ff"><i>my-keystore-password</i></font> -alias <font color="#0066ff"><i>myalias</i></font> -export -rfc -file <font color="#0066ff"><i>outfilename.cer</i></font>

</pre>
Here's an example of the text form of an exported certificate:

<pre>    -----BEGIN CERTIFICATE-----
    MIIC6TCCAqcCBDxgu/IwCwYHKoZIzjgEAwUAMFoxCzAJBgNVBAYTAlVTMQswCQYDVQQIEwJDQTES
    MBAGA1UEBxMJUGFsbyBBbHRvMQowCAYDVQQKEwFJMQswCQYDVQQLEwJNZTERMA8GA1UEAxMIUGF0
    IENoYW4wHhcNMDIwMjA2MDUxNTMwWhcNMDIwNTA3MDUxNTMwWjBaMQswCQYDVQQGEwJVUzELMAkG
    A1UECBMCQ0ExEjAQBgNVBAcTCVBhbG8gQWx0bzEKMAgGA1UEChMBSTELMAkGA1UECxMCTWUxETAP
    BgNVBAMTCFBhdCBDaGFuMIIBuDCCASwGByqGSM44BAEwggEfAoGBAP1/U4EddRIpUt9KnC7s5Of2
    EbdSPO9EAMMeP4C2USZpRV1AIlH7WT2NWPq/xfW6MPbLm1Vs14E7gB00b/JmYLdrmVClpJ+f6AR7
    ECLCT7up1/63xhv4O1fnxqimFQ8E+4P208UewwI1VBNaFpEy9nXzrith1yrv8iIDGZ3RSAHHAhUA
    l2BQjxUjC8yykrmCouuEC/BYHPUCgYEA9+GghdabPd7LvKtcNrhXuXmUr7v6OuqC+VdMCz0HgmdR
    WVeOutRZT+ZxBxCBgLRJFnEj6EwoFhO3zwkyjMim4TwWeotUfI0o4KOuHiuzpnWRbqN/C/ohNWLx
    +2J6ASQ7zKTxvqhRkImog9/hWuWfBpKLZl6Ae1UlZAFMO/7PSSoDgYUAAoGBAPyx9uQ1PKBYO/2G
    RPzbW4y6pphNRmObJQWbjY/ERuCQwLRrpREh9sgMnptZjRzLVpWdzxNa9bFMFXAYMgoTUIgAZ9yN
    WPjp/JiFfzdIq3CY0CEey42M3mbD3pWsF9x4SSsJTpDobX/pm5XgtkhZXBZYtBk813Xv2LxyZ3OI
    W1JnMAsGByqGSM44BAMFAAMvADAsAhQ5wayd5cpEo/vHmF7G5gVQ9cMKKAIUMfk2ZYxNdhe6oNmH
    nR0AhnEHILE=
    -----END CERTIFICATE-----
</pre>
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            &nbsp;<b>Related Examples</b></font></td>
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e223. <a class="eglink" href="CreateCert.html?l=rel">
    Creating a New Key Pair and Self-Signed Certificate Using keytool
</a>
<br>

e225. <a class="eglink" href="ImportCert.html?l=rel">
    Importing a Certificate from a File
</a>
<br>

e226. <a class="eglink" href="ListCertFact.html?l=rel">
    Listing All Available Certificate Formats
</a>
<br>

e227. <a class="eglink" href="GetDn.html?l=rel">
    Getting the Subject and Issuer Distinguished Names of an X509 Certificate
</a>
<br>


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<br>
        See also: 
<a class="eglink" href="/egs/java.security.cert/pkg.html?l=rel#Certification%20Paths">
    Certification Paths
</a>&nbsp;&nbsp;

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