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Added in API level 1

public class KeyRep
extends Object implements Serializable

java.lang.Object
↳	java.security.KeyRep

序列化密钥对象的标准化表示。

请注意，序列化的密钥可能包含敏感信息，不应在不受信任的环境中公开。有关更多信息，请参阅序列化规范的Security Appendix 。

也可以看看：

Nested classes
`枚举`	`KeyRep.Type` 密钥类型。

Public constructors
`KeyRep(KeyRep.Type type, String algorithm, String format, byte[] encoded)` 构建备用Key类。

Protected methods
`Object`	`readResolve()` 解决Key对象。

From class java.lang.Object

Added in API level 1

KeyRep (KeyRep.Type type, 
                String algorithm, 
                String format, 
                byte[] encoded)

构建备用Key类。

Parameters
`type`	`KeyRep.Type`: either one of Type.SECRET, Type.PUBLIC, or Type.PRIVATE
`algorithm`	`String`: the algorithm returned from `Key.getAlgorithm()`
`format`	`String`: the encoding format returned from `Key.getFormat()`
`encoded`	`byte`: the encoded bytes returned from `Key.getEncoded()`

Throws
`NullPointerException`	if type is `null`, if algorithm is `null`, if format is `null`, or if encoded is `null`

Added in API level 1

Object readResolve ()

解决Key对象。

此方法支持三种类型/格式组合：

Type.SECRET/"RAW" - returns a SecretKeySpec object constructed using encoded key bytes and algorithm
Type.PUBLIC/"X.509" - gets a KeyFactory instance for the key algorithm, constructs an X509EncodedKeySpec with the encoded key bytes, and generates a public key from the spec
Type.PRIVATE/"PKCS#8" - gets a KeyFactory instance for the key algorithm, constructs a PKCS8EncodedKeySpec with the encoded key bytes, and generates a private key from the spec

Returns
`Object`	the resolved Key object

Throws
`ObjectStreamException`	if the Type/format combination is unrecognized, if the algorithm, key format, or encoded key bytes are unrecognized/invalid, of if the resolution of the key fails for any reason