数字证书pfx与jks互转换工具类

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
	}
}

原文地址： http://blog.csdn.net/xieboshi/article/details/4204439