Provider getProperty() 方法在 Java 中
可以使用特定键使用 java.security.Provider 类中的 getProperty() 方法在属性列表中搜索所需的属性。此方法需要一个参数,即用于搜索属性所需的键。它返回键的属性值,如果属性值不可用,则返回 null。
以下是演示此方法的程序 −
示例
import java.security.*; import java.util.*; public class Demo { public static void main(String[] argv) throws Exception { try { KeyPairGenerator kpGenerator = KeyPairGenerator.getInstance("DSA"); Provider p = kpGenerator.getProvider(); Set<Object> s = p.keySet(); Iterator i = s.iterator(); int x = 30; while (x > 0) { System.out.println(p.getProperty((String)i.next())); x--; } } catch (NoSuchAlgorithmException e) { System.out.println("Error!!! NoSuchAlgorithmException"); } } }
输出
SHA1withDSA SHA1withDSA SHA1withDSA Software sun.security.provider.JavaKeyStore$DualFormatJKS SHA sun.security.provider.SHA sun.security.provider.JavaKeyStore$CaseExactJKS Software sun.security.provider.DSA$SHA256withDSA SHA SHA1withDSA Software Software Software sun.security.provider.DSA$RawDSA X.509 java.security.interfaces.DSAPublicKey|java.security.interfaces.DSAPrivateKey sun.security.provider.certpath.IndexedCollectionCertStore sun.security.provider.Sun SHA SHA1withDSA sun.security.provider.DomainKeyStore$DKS Software SHA256withDSA SHA224withDSA 1024 1024 Software sun.security.provider.DSAKeyFactory
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