Java中的Provider getInfo()方法及其示例

这个 getInfo() 方法 JAVA安全供应商 类用于返回提供程序及其服务的可读描述。这可能会返回一个带有相关链接的HTML页面。

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语法:

public String getInfo()

返回值: 此方法返回一个 描述 供应商及其服务的信息。

下面是一些例子来说明 getInfo() 方法:

例1:

// Java program to demonstrate
// get() method
import java.security.*;
import java.util.*;
public class GFG1 {
public static void main(String[] argv) throws Exception
{
try {
// creating the object of  KeyPairGenerator
KeyPairGenerator sr = KeyPairGenerator.getInstance( "DSA" , "SUN" );
// getting the Provider of the KeyPairGenerator sr
// by using method getProvider()
Provider provider = sr.getProvider();
// getting the info
String info = provider.getInfo();
// printing the string info
System.out.println( "info : " + info);
}
catch (NoSuchAlgorithmException e) {
System.out.println( "Exception thrown : " + e);
}
}
}


输出:

info : 
SUN (DSA key/parameter generation;
    DSA signing; SHA-1, MD5 digests; 
    SecureRandom; X.509 certificates; 
    JKS & DKS keystores; 
    PKIX CertPathValidator; 
    PKIX CertPathBuilder; 
    LDAP, Collection CertStores, JavaPolicy Policy; 
    JavaLoginConfig Configuration)

例2:

// Java program to demonstrate
// get() method
import java.security.*;
import java.util.*;
public class GFG1 {
public static void main(String[] argv) throws Exception
{
try {
// creating the object of  SecureRandom
SecureRandom sr = SecureRandom.getInstance( "SHA1PRNG" );
// getting the Provider of the SecureRandom sr
// by using method getProvider()
Provider provider = sr.getProvider();
// getting the info
String info = provider.getInfo();
// printing the string info
System.out.println( "info : " + info);
}
catch (NoSuchAlgorithmException e) {
System.out.println( "Exception thrown : " + e);
}
}
}


输出:

info : 
SUN (DSA key/parameter generation; 
    DSA signing; SHA-1, MD5 digests; 
    SecureRandom; X.509 certificates; 
    JKS & DKS keystores; 
    PKIX CertPathValidator; 
    PKIX CertPathBuilder; 
    LDAP, Collection CertStores, JavaPolicy Policy; 
    JavaLoginConfig Configuration)

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