Java MessageDigest getAlgorithm()用法及代码示例

java.security.MessageDigest类的getAlgorithm()方法用于返回与该消息摘要关联的算法的标准名称。

用法:

public final String getAlgorithm()

返回值：此方法返回消息摘要中使用的算法。

下面是说明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); 
        } 
    } 
}

输出：

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); 
        } 
    } 
}

输出：

Algorithm : SHA-256

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

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注：本文由纯净天空筛选整理自RohitPrasad3大神的英文原创作品 MessageDigest getAlgorithm() method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。