提供者。Java 中的服务 getAlgorithm()方法,示例
原文:https://www . geesforgeks . org/provider-service-getalgorithm-method-in-Java-with-examples/
Java . security . Provider . service类的 getAlgorithm() 方法用于返回此 Provider 的算法的标准名称。服务与关联。
语法:
public final String getAlgorithm()
返回值:该方法返回算法名称。
以下是说明 getAlgorithm() 方法的示例:
例 1:
Java 语言(一种计算机语言,尤用于创建网站)
// Java program to demonstrate
// getAlgorithm() method
import java.security.*;
import java.util.*;
public class GFG1 {
public static void main(String[] argv)
{
try {
// creating the object of Signature
Signature sr
= Signature.getInstance(
"SHA1withDSA",
"SUN");
// getting the Provider of the Signature sr
// by using method getProvider()
Provider provider
= sr.getProvider();
// getting the service of the provider
// using getServices() method
Provider.Service service
= provider
.getService("Signature",
sr.getAlgorithm());
// getting algorithm of Provider.Service object
// by using getAlgorithm() method
String algo = service.getAlgorithm();
// display the result
System.out.println("Algorithm : " + algo);
}
catch (NoSuchAlgorithmException e) {
System.out.println("Exception thrown : " + e);
}
catch (NoSuchProviderException e) {
System.out.println("Exception thrown : " + e);
}
}
}
Output:
Algorithm : SHA1withDSA
例 2:
Java 语言(一种计算机语言,尤用于创建网站)
// Java program to demonstrate
// getAlgorithm() method
import java.security.*;
import java.util.*;
public class GFG1 {
public static void main(String[] argv)
{
try {
// creating object of MessageDigest
MessageDigest msd
= MessageDigest.getInstance("MD5");
// getting the Provider of the Signature sr
// by using method getProvider()
Provider provider = msd.getProvider();
// getting the service of the provider
// using getServices() method
Provider.Service service
= provider
.getService("MessageDigest",
msd.getAlgorithm());
// getting algorithm of Provider.Service object
// by using getAlgorithm() method
String algo = service.getAlgorithm();
// display the result
System.out.println("Algorithm : " + algo);
}
catch (NoSuchAlgorithmException e) {
System.out.println("Exception thrown : " + e);
}
}
}
Output:
Algorithm : MD5
参考:https://docs . Oracle . com/javase/9/docs/API/Java/security/Provider。service . html # getAlgorithm–
版权属于:月萌API www.moonapi.com,转载请注明出处