Java 中的 MessageDigest getAlgorithm()方法，带示例

原文:https://www . geesforgeks . org/messagedigest-getalgorithm-method-in-Java-with-examples/

Java . security . messagedigest类的方法 getAlgorithm() 用于返回与该消息摘要相关联的算法的标准名称。

语法:

public final String getAlgorithm()

返回值:该方法返回消息摘要中使用的算法。

以下是说明 getAlgorithm() 方法的示例:

例 1:

// 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");

            // get the name of algorithm
            // used in MessageDigest
            // using getAlgorithm() method
            String algo = msd.getAlgorithm();

            // printing the string algo
            System.out.println("Algorithm : " + algo);
        }

        catch (NoSuchAlgorithmException e) {

            System.out.println("Exception thrown : " + e);
        }
        catch (ProviderException e) {

            System.out.println("Exception thrown : " + e);
        }
    }
}

输出:

Algorithm : MD5

例 2:

// 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("SHA-256");

            // get the name of algorithm used in MessageDigest
            // using getAlgorithm() method
            String algo = msd.getAlgorithm();

            // printing the string algo
            System.out.println("Algorithm : " + algo);
        }

        catch (NoSuchAlgorithmException e) {

            System.out.println("Exception thrown : " + e);
        }
        catch (ProviderException e) {

            System.out.println("Exception thrown : " + e);
        }
    }
}

输出:

Algorithm : SHA-256

参考:https://docs . Oracle . com/javase/9/docs/API/Java/security/messagedigest . html # getAlgorithm–

版权属于：月萌API www.moonapi.com，转载请注明出处

本文链接：https://www.moonapi.com/news/24108.html