Java MessageDigest getAlgorithm()用法及代碼示例

java.security.MessageDigest類的getAlgorithm()方法用於返回與該消息摘要關聯的算法的標準名稱。

用法:

public final String getAlgorithm()

返回值：此方法返回消息摘要中使用的算法。

下麵是說明getAlgorithm()方法的示例：

示例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); 
        } 
    } 
}

輸出：

Algorithm : MD5

示例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); 
        } 
    } 
}

輸出：

Algorithm : SHA-256

參考： https://docs.oracle.com/javase/9/docs/api/java/security/MessageDigest.html#getAlgorithm–

相關用法

注：本文由純淨天空篩選整理自RohitPrasad3大神的英文原創作品 MessageDigest getAlgorithm() method in Java with Examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。