Java 中的 MessageDigest toString()方法，带示例
原文:https://www . geesforgeks . org/messagedigest-tostring-method-in-Java-with-examples/
Java . security . messagedigest类的 toString() 方法用于以字符串格式提供消息摘要的对象。
语法:
public String toString()
返回值:该方法以字符串形式返回消息摘要的对象。
以下是说明 toString() 方法的示例:
例 1:
// Java program to demonstrate
// toString() method
import java.security.*;
import java.util.*;
public class GFG1 {
public static void main(String[] argv)
{
try {
// creating object of MessageDigest
MessageDigest msd1
= MessageDigest.getInstance("MD5");
// getting the string value of msd1
// using toString() method
String nv = msd1.toString();
// display the result
System.out.println("MessageDigest : "
+ nv);
}
catch (NoSuchAlgorithmException e) {
System.out.println("Exception thrown : "
+ e);
}
catch (ProviderException e) {
System.out.println("Exception thrown : "
+ e);
}
}
}
输出:
MessageDigest : MD5 Message Digest from SUN, <initialized>
例 2:
// Java program to demonstrate
// toString() method
import java.security.*;
import java.util.*;
public class GFG1 {
public static void main(String[] argv)
{
try {
// creating object of MessageDigest
MessageDigest msd1
= MessageDigest.getInstance("SHA-256");
// getting the string value of msd1
// using toString() method
String nv = msd1.toString();
// display the result
System.out.println("MessageDigest : " + nv);
}
catch (NoSuchAlgorithmException e) {
System.out.println("Exception thrown : " + e);
}
catch (ProviderException e) {
System.out.println("Exception thrown : " + e);
}
}
}
输出:
MessageDigest : SHA-256 Message Digest from SUN, <initialized>
参考:https://docs . Oracle . com/javase/9/docs/API/Java/security/messagedigest . html # toString–
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