java.security.Provider.Service类的toString()方法返回此提供程序服务的字符串表示形式。
用法:
public String toString()
返回值:此方法提供此提供程序服务的字符串表示形式。
下面是说明toString()方法的示例:
范例1:
// Java program to demonstrate
// toString() method
import java.security.*;
import java.util.*;
public class GFG1 {
public static void main(String[] argv)
{
try {
// creating the object of Signature
Signature sr
= Signature.getInstance(
"SHA1withDSA",
"SUN");
// getting the Provider of the Signature sr
// by using method getProvider()
Provider provider = sr.getProvider();
// getting the service of the provider
// using getServices() method
Provider.Service service
= provider
.getService("Signature",
sr.getAlgorithm());
// getting string representation
// of Provider.Service object
// by using getClassName() method
String value = service.toString();
// display the result
System.out.println("String representation:"
+ value);
}
catch (NoSuchAlgorithmException e) {
System.out.println("Exception thrown:" + e);
}
catch (NoSuchProviderException e) {
System.out.println("Exception thrown:" + e);
}
}
}
String representation:SUN:Signature.SHA1withDSA -> sun.security.provider.DSA$SHA1withDSA
aliases:[DSA, DSS, SHA/DSA, SHA-1/DSA, SHA1/DSA, SHAwithDSA, DSAWithSHA1, OID.1.2.840.10040.4.3, 1.2.840.10040.4.3, 1.3.14.3.2.13, 1.3.14.3.2.27]
attributes:{ImplementedIn=Software, KeySize=1024, SupportedKeyClasses=java.security.interfaces.DSAPublicKey|java.security.interfaces.DSAPrivateKey}
范例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 msd
= MessageDigest.getInstance("MD5");
// getting the Provider of the Signature sr
// by using method getProvider()
Provider provider = msd.getProvider();
// getting the service of the provider
// using getServices() method
Provider.Service service
= provider
.getService("MessageDigest",
msd.getAlgorithm());
// getting a string representation
// of Provider.Service object
// by using getClassName() method
String value = service.toString();
// display the result
System.out.println("String representation:"
+ value);
}
catch (NoSuchAlgorithmException e) {
System.out.println("Exception thrown:" + e);
}
}
}
String representation:SUN:MessageDigest.MD5 -> sun.security.provider.MD5
attributes:{ImplementedIn=Software}
参考: https://docs.oracle.com/javase/9/docs/api/java/security/Provider.Service.html#toString-
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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 Provider.Service toString() 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。