列举系统中可用的加密算法，列举可用加密算法,package com.

列举系统中可用的加密算法，列举可用加密算法,package com.

package com.javacodegeeks.snippets.core;import java.security.Provider;import java.security.Security;import java.util.Iterator;import java.util.Set;import java.util.TreeSet;public class ListAvailableCryptographicServices {    public static void main(String[] args) {        Set<String> serviceTypes = new TreeSet<String>();        // get an array containing all the installed providers        Provider[] providers = Security.getProviders();        for (int i=0; i<providers.length; i++) {            // get a view of the property keys contained in this provider            Set<Object> keys = providers[i].keySet();            for (Iterator<Object> it=keys.iterator(); it.hasNext();) {                String key = it.next().toString();                key = key.split(" ")[0];                if (key.startsWith("Alg.Alias.")) {                    // strip the alias                    key = key.substring(10);                }                int index = key.indexOf('.');                serviceTypes.add(key.substring(0, index));            }        }        for (Iterator<String> it=serviceTypes.iterator(); it.hasNext();) {            System.out.println(it.next());        }    }}

输出：

AlgorithmParameterGeneratorAlgorithmParametersCertPathBuilderCertPathValidatorCertStoreCertificateFactoryCipherConfigurationGssApiMechanismKeyAgreementKeyFactoryKeyGeneratorKeyInfoFactoryKeyManagerFactoryKeyPairGeneratorKeyStoreMacMessageDigestPolicyProviderSSLContextSaslClientFactorySaslServerFactorySecretKeyFactorySecureRandomSignatureTerminalFactoryTransformServiceTrustManagerFactoryXMLSignatureFactory