SSLContext

java.lang.Object
- javax.net.ssl.SSLContext

```
public class SSLContext
extends Object
```
Instances of this class represent a secure socket protocol implementation which acts as a factory for secure socket factories or SSLEngines. This class is initialized with an optional set of key and trust managers and source of secure random bytes.
Every implementation of the Java platform is required to support the following standard SSLContext protocol:
- TLSv1
This protocol is described in the SSLContext section of the Java Cryptography Architecture Standard Algorithm Name Documentation. Consult the release documentation for your implementation to see if any other algorithms are supported.
从以下版本开始:

1.4

构造器概要

构造器
限定符构造器说明

protected SSLContext(SSLContextSpi contextSpi, Provider provider, String protocol)
Creates an SSLContext object.

构造器
限定符	构造器	说明
`protected`	`SSLContext(SSLContextSpi contextSpi, Provider provider, String protocol)`	Creates an SSLContext object.

方法概要

所有方法静态方法实例方法具体方法
限定符和类型	方法	说明
`SSLEngine`	`createSSLEngine()`	Creates a new `SSLEngine` using this context.
`SSLEngine`	`createSSLEngine(String peerHost, int peerPort)`	Creates a new `SSLEngine` using this context using advisory peer information.
`SSLSessionContext`	`getClientSessionContext()`	Returns the client session context, which represents the set of SSL sessions available for use during the handshake phase of client-side SSL sockets.
`static SSLContext`	`getDefault()`	Returns the default SSL context.
`SSLParameters`	`getDefaultSSLParameters()`	Returns a copy of the SSLParameters indicating the default settings for this SSL context.
`static SSLContext`	`getInstance(String protocol)`	Returns a `SSLContext` object that implements the specified secure socket protocol.
`static SSLContext`	`getInstance(String protocol, String provider)`	Returns a `SSLContext` object that implements the specified secure socket protocol.
`static SSLContext`	`getInstance(String protocol, Provider provider)`	Returns a `SSLContext` object that implements the specified secure socket protocol.
`String`	`getProtocol()`	Returns the protocol name of this `SSLContext` object.
`Provider`	`getProvider()`	Returns the provider of this `SSLContext` object.
`SSLSessionContext`	`getServerSessionContext()`	Returns the server session context, which represents the set of SSL sessions available for use during the handshake phase of server-side SSL sockets.
`SSLServerSocketFactory`	`getServerSocketFactory()`	Returns a `ServerSocketFactory` object for this context.
`SSLSocketFactory`	`getSocketFactory()`	Returns a `SocketFactory` object for this context.
`SSLParameters`	`getSupportedSSLParameters()`	Returns a copy of the SSLParameters indicating the supported settings for this SSL context.
`void`	`init(KeyManager[] km, TrustManager[] tm, SecureRandom random)`	Initializes this context.
`static void`	`setDefault(SSLContext context)`	Sets the default SSL context.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - SSLContext
```
protected SSLContext(SSLContextSpi contextSpi,
                     Provider provider,
                     String protocol)
```
    Creates an SSLContext object.
    
    参数:
    
    contextSpi - the delegate
    
    provider - the provider
    
    protocol - the protocol
- 方法详细资料
  - getDefault
```
public static SSLContext getDefault()
                             throws NoSuchAlgorithmException
```
    Returns the default SSL context.
    If a default context was set using the SSLContext.setDefault() method, it is returned. Otherwise, the first call of this method triggers the call SSLContext.getInstance("Default"). If successful, that object is made the default SSL context and returned.
    The default context is immediately usable and does not require initialization.
    
    返回:
    
    the default SSL context
    
    抛出:
    
    NoSuchAlgorithmException - if the SSLContext#getInstance call fails
    
    从以下版本开始:
    
    1.6
  - setDefault
```
public static void setDefault(SSLContext context)
```
    Sets the default SSL context. It will be returned by subsequent calls to getDefault(). The default context must be immediately usable and not require initialization.
    
    参数:
    
    context - the SSLContext
    
    抛出:
    
    NullPointerException - if context is null
    
    SecurityException - if a security manager exists and its checkPermission method does not allow SSLPermission("setDefaultSSLContext")
    
    从以下版本开始:
    
    1.6
  - getInstance
```
public static SSLContext getInstance(String protocol)
                              throws NoSuchAlgorithmException
```
    Returns a SSLContext object that implements the specified secure socket protocol.
    This method traverses the list of registered security Providers, starting with the most preferred Provider. A new SSLContext object encapsulating the SSLContextSpi implementation from the first Provider that supports the specified protocol is returned.
    Note that the list of registered providers may be retrieved via the Security#getProviders() method.
    
    参数:
    
    protocol - the standard name of the requested protocol. See the SSLContext section in the Java Cryptography Architecture Standard Algorithm Name Documentation for information about standard protocol names.
    
    返回:
    
    the new SSLContext object.
    
    抛出:
    
    NoSuchAlgorithmException - if no Provider supports a SSLContextSpi implementation for the specified protocol.
    
    NullPointerException - if protocol is null.
    
    另请参阅:
    
    Provider
  - getInstance
```
public static SSLContext getInstance(String protocol,
                                     String provider)
                              throws NoSuchAlgorithmException,
                                     NoSuchProviderException
```
    Returns a SSLContext object that implements the specified secure socket protocol.
    A new SSLContext object encapsulating the SSLContextSpi implementation from the specified provider is returned. The specified provider must be registered in the security provider list.
    Note that the list of registered providers may be retrieved via the Security#getProviders() method.
    
    参数:
    
    protocol - the standard name of the requested protocol. See the SSLContext section in the Java Cryptography Architecture Standard Algorithm Name Documentation for information about standard protocol names.
    
    provider - the name of the provider.
    
    返回:
    
    the new SSLContext object.
    
    抛出:
    
    NoSuchAlgorithmException - if a SSLContextSpi implementation for the specified protocol is not available from the specified provider.
    
    NoSuchProviderException - if the specified provider is not registered in the security provider list.
    
    IllegalArgumentException - if the provider name is null or empty.
    
    NullPointerException - if protocol is null.
    
    另请参阅:
    
    Provider
  - getInstance
```
public static SSLContext getInstance(String protocol,
                                     Provider provider)
                              throws NoSuchAlgorithmException
```
    Returns a SSLContext object that implements the specified secure socket protocol.
    A new SSLContext object encapsulating the SSLContextSpi implementation from the specified Provider object is returned. Note that the specified Provider object does not have to be registered in the provider list.
    
    参数:
    
    protocol - the standard name of the requested protocol. See the SSLContext section in the Java Cryptography Architecture Standard Algorithm Name Documentation for information about standard protocol names.
    
    provider - an instance of the provider.
    
    返回:
    
    the new SSLContext object.
    
    抛出:
    
    NoSuchAlgorithmException - if a SSLContextSpi implementation for the specified protocol is not available from the specified Provider object.
    
    IllegalArgumentException - if the provider is null.
    
    NullPointerException - if protocol is null.
    
    另请参阅:
    
    Provider
  - getProtocol
```
public final String getProtocol()
```
    Returns the protocol name of this SSLContext object.
    This is the same name that was specified in one of the getInstance calls that created this SSLContext object.
    
    返回:
    
    the protocol name of this SSLContext object.
  - getProvider
```
public final Provider getProvider()
```
    Returns the provider of this SSLContext object.
    
    返回:
    
    the provider of this SSLContext object
  - init
```
public final void init(KeyManager[] km,
                       TrustManager[] tm,
                       SecureRandom random)
                throws KeyManagementException
```
    Initializes this context. Either of the first two parameters may be null in which case the installed security providers will be searched for the highest priority implementation of the appropriate factory. Likewise, the secure random parameter may be null in which case the default implementation will be used.
    Only the first instance of a particular key and/or trust manager implementation type in the array is used. (For example, only the first javax.net.ssl.X509KeyManager in the array will be used.)
    
    参数:
    
    km - the sources of authentication keys or null
    
    tm - the sources of peer authentication trust decisions or null
    
    random - the source of randomness for this generator or null
    
    抛出:
    
    KeyManagementException - if this operation fails
  - getSocketFactory
```
public final SSLSocketFactory getSocketFactory()
```
    Returns a SocketFactory object for this context.
    
    返回:
    
    the SocketFactory object
    
    抛出:
    
    IllegalStateException - if the SSLContextImpl requires initialization and the init() has not been called
  - getServerSocketFactory
```
public final SSLServerSocketFactory getServerSocketFactory()
```
    Returns a ServerSocketFactory object for this context.
    
    返回:
    
    the ServerSocketFactory object
    
    抛出:
    
    IllegalStateException - if the SSLContextImpl requires initialization and the init() has not been called
  - createSSLEngine
```
public final SSLEngine createSSLEngine()
```
    Creates a new SSLEngine using this context.
    Applications using this factory method are providing no hints for an internal session reuse strategy. If hints are desired, createSSLEngine(java.lang.String,int) should be used instead.
    Some cipher suites (such as Kerberos) require remote hostname information, in which case this factory method should not be used.
    
    返回:
    
    the SSLEngine object
    
    抛出:
    
    UnsupportedOperationException - if the underlying provider does not implement the operation.
    
    IllegalStateException - if the SSLContextImpl requires initialization and the init() has not been called
    
    从以下版本开始:
    
    1.5
  - createSSLEngine
```
public final SSLEngine createSSLEngine(String peerHost,
                                       int peerPort)
```
    Creates a new SSLEngine using this context using advisory peer information.
    Applications using this factory method are providing hints for an internal session reuse strategy.
    Some cipher suites (such as Kerberos) require remote hostname information, in which case peerHost needs to be specified.
    
    参数:
    
    peerHost - the non-authoritative name of the host
    
    peerPort - the non-authoritative port
    
    返回:
    
    the new SSLEngine object
    
    抛出:
    
    UnsupportedOperationException - if the underlying provider does not implement the operation.
    
    IllegalStateException - if the SSLContextImpl requires initialization and the init() has not been called
    
    从以下版本开始:
    
    1.5
  - getServerSessionContext
```
public final SSLSessionContext getServerSessionContext()
```
    Returns the server session context, which represents the set of SSL sessions available for use during the handshake phase of server-side SSL sockets.
    This context may be unavailable in some environments, in which case this method returns null. For example, when the underlying SSL provider does not provide an implementation of SSLSessionContext interface, this method returns null. A non-null session context is returned otherwise.
    
    返回:
    
    server session context bound to this SSL context
  - getClientSessionContext
```
public final SSLSessionContext getClientSessionContext()
```
    Returns the client session context, which represents the set of SSL sessions available for use during the handshake phase of client-side SSL sockets.
    This context may be unavailable in some environments, in which case this method returns null. For example, when the underlying SSL provider does not provide an implementation of SSLSessionContext interface, this method returns null. A non-null session context is returned otherwise.
    
    返回:
    
    client session context bound to this SSL context
  - getDefaultSSLParameters
```
public final SSLParameters getDefaultSSLParameters()
```
    Returns a copy of the SSLParameters indicating the default settings for this SSL context.
    The parameters will always have the ciphersuites and protocols arrays set to non-null values.
    
    返回:
    
    a copy of the SSLParameters object with the default settings
    
    抛出:
    
    UnsupportedOperationException - if the default SSL parameters could not be obtained.
    
    从以下版本开始:
    
    1.6
  - getSupportedSSLParameters
```
public final SSLParameters getSupportedSSLParameters()
```
    Returns a copy of the SSLParameters indicating the supported settings for this SSL context.
    The parameters will always have the ciphersuites and protocols arrays set to non-null values.
    
    返回:
    
    a copy of the SSLParameters object with the supported settings
    
    抛出:
    
    UnsupportedOperationException - if the supported SSL parameters could not be obtained.
    
    从以下版本开始:
    
    1.6

类 SSLContext

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

SSLContext

方法详细资料

getDefault

setDefault

getInstance

getInstance

getInstance

getProtocol

getProvider

init

getSocketFactory

getServerSocketFactory

createSSLEngine

createSSLEngine

getServerSessionContext

getClientSessionContext

getDefaultSSLParameters

getSupportedSSLParameters