Java中的提供者getProperty()方法
使用getProperty()类java.security.Provider中的方法，可以使用特定键在属性列表中搜索所需的属性。此方法需要一个参数，即搜索属性所需的键。它返回键的属性值；如果该属性值不可用，则返回null。
演示此的程序如下所示-
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");
}
}
}输出结果
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