Java MessageDigest getProvider()用法及代碼示例

java.security.MessageDigest類的getProvider()方法用於獲取此消息摘要的提供者。

用法:

public final Provider getProvider()

返回值：此方法返回此MessageDigest的提供者。

下麵是說明getProvider()方法的示例：

示例1:對於AlgorithmMD5

// 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 provider used in object msd 
            // using getAlgorithm() method 
            Provider pro = msd.getProvider(); 
  
            // display the provider 
            System.out.println("Provider : " + pro); 
        } 
  
        catch (NoSuchAlgorithmException e) { 
  
            System.out.println("Exception thrown : " + e); 
        } 
        catch (ProviderException e) { 
  
            System.out.println("Exception thrown : " + e); 
        } 
    } 
}

輸出：

Provider : SUN version 1.8

示例2:對於算法SHA-256

// 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"); 
  
            // getting provider used in object msd 
            // using getAlgorithm() method 
            Provider pro = msd.getProvider(); 
  
            // display the provider 
            System.out.println("Provider : " + pro); 
        } 
  
        catch (NoSuchAlgorithmException e) { 
  
            System.out.println("Exception thrown : " + e); 
        } 
        catch (ProviderException e) { 
  
            System.out.println("Exception thrown : " + e); 
        } 
    } 
}

輸出：

Provider : SUN version 1.8

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 getProvider() 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。