java.security.KeyStore类的getType()方法用于获取此 key 库的类型。
用法:
public final String getType()
参数:此方法不接受任何参数。
返回值:此方法返回此 key 库的类型。
注意:由于不存在“ privatekey” key 库,因此本文中的所有程序都无法在在线IDE上运行。您可以在系统上的Java编译器上检查此代码。要检查此代码,请在系统上创建 key 库“ privatekey”,并设置自己的 key 库密码以访问该 key 库。
以下示例说明了getType?()方法:
示例1:
// Java program to demonstrate getType() method
import java.security.*;
import java.security.cert.*;
import java.util.*;
import java.io.*;
public class GFG {
public static void main(String[] argv)
{
try {
// creating the object of KeyStore
// and getting instance
// By using getInstance() method
KeyStore sr = KeyStore.getInstance("JKS");
// keystore password is required to access keystore
char[] pass = ("123456").toCharArray();
// creating and initializing object of InputStream
InputStream is
= new FileInputStream(
"f:/java/private key.store");
// initializing keystore object
sr.load(is, pass);
// getting the type of keystore
// using getType?() method
String type = sr.getType();
// display the result
System.out.println("Type of keystore : "
+ type);
}
catch (NoSuchAlgorithmException e) {
System.out.println("Exception thrown : " + e);
}
catch (NullPointerException e) {
System.out.println("Exception thrown : " + e);
}
catch (KeyStoreException e) {
System.out.println("Exception thrown : " + e);
}
catch (FileNotFoundException e) {
System.out.println("Exception thrown : " + e);
}
catch (IOException e) {
System.out.println("Exception thrown : " + e);
}
catch (CertificateException e) {
System.out.println("Exception thrown : " + e);
}
}
}
示例2:对于不加载 key 库
// Java program to demonstrate getType() method
import java.security.*;
import java.security.cert.*;
import java.util.*;
import java.io.*;
public class GFG {
public static void main(String[] argv)
{
try {
// creating the object of KeyStore
// and getting instance
// By using getInstance() method
KeyStore sr = KeyStore.getInstance("JKS");
// keystore password is required to access keystore
char[] pass = ("123456").toCharArray();
// creating and initializing object of InputStream
InputStream is
= new FileInputStream(
"f:/java/private key.store");
// getting the type of keystore
// using getType?() method
String type = sr.getType();
// display the result
System.out.println("Type of keystore : "
+ type);
}
catch (NullPointerException e) {
System.out.println("Exception thrown : " + e);
}
catch (KeyStoreException e) {
System.out.println("Exception thrown : " + e);
}
catch (FileNotFoundException e) {
System.out.println("Exception thrown : " + e);
}
}
}
参考: https://docs.oracle.com/javase/9/docs/api/java/security/KeyStore.html#getType–
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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 KeyStore getType() 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。