数字证书pfx与jks互转换工具类

转载：http://blog.csdn.net/xieboshi/archive/2009/05/20/4204439.aspx

public class ConventPFX {  
    public static final String PKCS12 = "PKCS12";  
    public static final String JKS = "JKS";  
    public static final String PFX_KEYSTORE_FILE = "c:\\test.pfx";  
    public static final String KEYSTORE_PASSWORD = "123456";  
    public static final String JKS_KEYSTORE_FILE = "c:\\test.jks";  
    public static void coverTokeyStore() {  
        try {  
            KeyStore inputKeyStore = KeyStore.getInstance("PKCS12");  
            FileInputStream fis = new FileInputStream(PFX_KEYSTORE_FILE);  
            char[] nPassword = null;  
            if ((KEYSTORE_PASSWORD == null)  
                    || KEYSTORE_PASSWORD.trim().equals("")) {  
                nPassword = null;  
            } else {  
                nPassword = KEYSTORE_PASSWORD.toCharArray();  
            }  
            inputKeyStore.load(fis, nPassword);  
            fis.close();  
            KeyStore outputKeyStore = KeyStore.getInstance("JKS");  
            outputKeyStore.load(null, KEYSTORE_PASSWORD.toCharArray());  
            Enumeration enums = inputKeyStore.aliases();  
            while (enums.hasMoreElements()) { // we are readin just one  
                                                // certificate.  
                String keyAlias = (String) enums.nextElement();  
                System.out.println("alias=[" + keyAlias + "]");  
                if (inputKeyStore.isKeyEntry(keyAlias)) {  
                    Key key = inputKeyStore.getKey(keyAlias, nPassword);  
                    Certificate[] certChain = inputKeyStore  
                            .getCertificateChain(keyAlias);  
                    outputKeyStore.setKeyEntry(keyAlias, key, KEYSTORE_PASSWORD  
                            .toCharArray(), certChain);  
                }  
            }  
            FileOutputStream out = new FileOutputStream(JKS_KEYSTORE_FILE);  
            outputKeyStore.store(out, nPassword);  
            out.close();  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
    public static void coverToPfx() {  
        try {  
            KeyStore inputKeyStore = KeyStore.getInstance("JKS");  
            FileInputStream fis = new FileInputStream(JKS_KEYSTORE_FILE);  
            char[] nPassword = null;  
            if ((KEYSTORE_PASSWORD == null)  
                    || KEYSTORE_PASSWORD.trim().equals("")) {  
                nPassword = null;  
            } else {  
                nPassword = KEYSTORE_PASSWORD.toCharArray();  
            }  
            inputKeyStore.load(fis, nPassword);  
            fis.close();  
            KeyStore outputKeyStore = KeyStore.getInstance("PKCS12");  
            outputKeyStore.load(null, KEYSTORE_PASSWORD.toCharArray());  
            Enumeration enums = inputKeyStore.aliases();  
            while (enums.hasMoreElements()) { // we are readin just one  
                                                // certificate.  
                String keyAlias = (String) enums.nextElement();  
                System.out.println("alias=[" + keyAlias + "]");  
                if (inputKeyStore.isKeyEntry(keyAlias)) {  
                    Key key = inputKeyStore.getKey(keyAlias, nPassword);  
                    Certificate[] certChain = inputKeyStore  
                            .getCertificateChain(keyAlias);  
                    outputKeyStore.setKeyEntry(keyAlias, key, KEYSTORE_PASSWORD  
                            .toCharArray(), certChain);  
                }  
            }  
            FileOutputStream out = new FileOutputStream(PFX_KEYSTORE_FILE);  
            outputKeyStore.store(out, nPassword);  
            out.close();  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
    public static void main(String[] args) {  
        //coverToPfx(); //jks to pfx  
        //coverTokeyStore();    // pfx to jks  
    }  
}