java.security.Provider.Service类的getAttribute()方法用于返回此方法中传递的特定属性名称的属性值。
用法:
public final String getAttribute(String name)
返回值:此方法返回特定属性类型的值。
下面是说明getAttribute()方法的示例:
范例1:
// Java program to demonstrate
// getAttribute() 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 algoritm of Provider.Service object
// by using getAlgorithm() method
String algo = service.getAttribute("KeySize");
// display the result
System.out.println("KeySize is:" + algo);
}
catch (NoSuchAlgorithmException e) {
System.out.println("Exception thrown:" + e);
}
catch (NoSuchProviderException e) {
System.out.println("Exception thrown:" + e);
}
}
}
输出:
KeySize is:1024
范例2:
// Java program to demonstrate
// getAttribute() 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 algoritm of Provider.Service object
// by using getAlgorithm() method
String algo
= service.getAttribute("ImplementedIn");
// display the result
System.out.println("ImplementedIn:"
+ algo);
}
catch (NoSuchAlgorithmException e) {
System.out.println("Exception thrown:"
+ e);
}
}
}
输出:
ImplementedIn:Software
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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 getAttribute() 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。