compact1, compact2, compact3

java.net

Class NetPermission

java.lang.Object

java.security.Permission

java.security.BasicPermission

java.net.NetPermission

All Implemented Interfaces:

Serializable ， Guard

public final class NetPermission
extends BasicPermission

此类用于各种网络权限。 NetPermission包含一个名称（也称为“目标名称”），但没有操作列表; 你有指定的权限，或者你没有。

目标名称是网络许可的名称（见下文）。 命名约定遵循层次化属性命名约定。 此外，星号可能会出现在名称的末尾，遵循“。”或本身表示通配符匹配。 例如：“foo。*”和“*”表示通配符匹配，而“* foo”和“a * b”则不表示。

下表列出了所有可能的NetPermission目标名称，每个都提供了许可允许的描述，并讨论授予代码的权限。

Permission Target Name What the Permission Allows Risks of Allowing this Permission allowHttpTrace The ability to use the HTTP TRACE method in HttpURLConnection. Malicious code using HTTP TRACE could get access to security sensitive information in the HTTP headers (such as cookies) that it might not otherwise have access to. getCookieHandler The ability to get the cookie handler that processes highly security sensitive cookie information for an Http session. Malicious code can get a cookie handler to obtain access to highly security sensitive cookie information. Some web servers use cookies to save user private information such as access control information, or to track user browsing habit. getNetworkInformation The ability to retrieve all information about local network interfaces. Malicious code can read information about network hardware such as MAC addresses, which could be used to construct local IPv6 addresses. getProxySelector The ability to get the proxy selector used to make decisions on which proxies to use when making network connections. Malicious code can get a ProxySelector to discover proxy hosts and ports on internal networks, which could then become targets for attack. getResponseCache The ability to get the response cache that provides access to a local response cache. Malicious code getting access to the local response cache could access security sensitive information. requestPasswordAuthentication The ability to ask the authenticator registered with the system for a password Malicious code may steal this password. setCookieHandler The ability to set the cookie handler that processes highly security sensitive cookie information for an Http session. Malicious code can set a cookie handler to obtain access to highly security sensitive cookie information. Some web servers use cookies to save user private information such as access control information, or to track user browsing habit. setDefaultAuthenticator The ability to set the way authentication information is retrieved when a proxy or HTTP server asks for authentication Malicious code can set an authenticator that monitors and steals user authentication input as it retrieves the input from the user. setProxySelector The ability to set the proxy selector used to make decisions on which proxies to use when making network connections. Malicious code can set a ProxySelector that directs network traffic to an arbitrary network host. setResponseCache The ability to set the response cache that provides access to a local response cache. Malicious code getting access to the local response cache could access security sensitive information, or create false entries in the response cache. specifyStreamHandler The ability to specify a stream handler when constructing a URL Malicious code may create a URL with resources that it would normally not have access to (like file:/foo/fum/), specifying a stream handler that gets the actual bytes from someplace it does have access to. Thus it might be able to trick the system into creating a ProtectionDomain/CodeSource for a class even though that class really didn't come from that location.

另请参见：

BasicPermission ， Permission ， Permissions ， PermissionCollection ， SecurityManager ， Serialized Form

构造方法摘要

构造方法

Constructor and Description
NetPermission(String name) 创建一个具有指定名称的新NetPermission。
NetPermission(String name, String actions) 创建具有指定名称的新NetPermission对象。

方法摘要

Methods inherited from class java.security.BasicPermission

equals, getActions, hashCode, implies, newPermissionCollection

Methods inherited from class java.security.Permission

checkGuard, getName, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

构造方法详细信息

NetPermission

public NetPermission(String name)

创建一个具有指定名称的新NetPermission。 名称是NetPermission的符号名称，例如“setDefaultAuthenticator”等。星号可能会出现在名称的末尾，跟随“。”，或者本身表示通配符匹配。

参数

name - name的名称。

异常

NullPointerException - 如果 name是 null 。

IllegalArgumentException - 如果 name为空。

NetPermission

public NetPermission(String name,
                     String actions)

创建具有指定名称的新NetPermission对象。 该名称是NetPermission的符号名称，并且操作String当前未使用，并且应为null。

参数

name - name的名称。

actions - 应为null。

异常

NullPointerException - 如果 name是 null 。

IllegalArgumentException - 如果 name为空。