com.kdgcsoft.power.fileconverter.util

类 SocketUtils

java.lang.Object

com.kdgcsoft.power.fileconverter.util.SocketUtils

public class SocketUtils
extends Object

Simple utility methods for working with network sockets — for example, for finding available ports on localhost.

Within this class, a TCP port refers to a port for a ServerSocket; whereas, a UDP port refers to a port for a DatagramSocket.

从以下版本开始:

4.0

作者:

Sam Brannen, Ben Hale, Arjen Poutsma, Gunnar Hillert, Gary Russell

字段概要

字段

限定符和类型	字段和说明
static int	PORT_RANGE_MAX The default maximum value for port ranges used when finding an available socket port.
static int	PORT_RANGE_MIN The default minimum value for port ranges used when finding an available socket port.

构造器概要

构造器

构造器和说明
SocketUtils() Although SocketUtils consists solely of static utility methods, this constructor is intentionally public.

方法概要

限定符和类型	方法和说明
static int	findAvailableTcpPort() Find an available TCP port randomly selected from the range [1024, 65535].
static int	findAvailableTcpPort(int minPort) Find an available TCP port randomly selected from the range [minPort, 65535].
static int	findAvailableTcpPort(int minPort, int maxPort) Find an available TCP port randomly selected from the range [minPort, maxPort].
static SortedSet<Integer>	findAvailableTcpPorts(int numRequested) Find the requested number of available TCP ports, each randomly selected from the range [1024, 65535].
static SortedSet<Integer>	findAvailableTcpPorts(int numRequested, int minPort, int maxPort) Find the requested number of available TCP ports, each randomly selected from the range [minPort, maxPort].
static int	findAvailableUdpPort() Find an available UDP port randomly selected from the range [1024, 65535].
static int	findAvailableUdpPort(int minPort) Find an available UDP port randomly selected from the range [minPort, 65535].
static int	findAvailableUdpPort(int minPort, int maxPort) Find an available UDP port randomly selected from the range [minPort, maxPort].
static SortedSet<Integer>	findAvailableUdpPorts(int numRequested) Find the requested number of available UDP ports, each randomly selected from the range [1024, 65535].
static SortedSet<Integer>	findAvailableUdpPorts(int numRequested, int minPort, int maxPort) Find the requested number of available UDP ports, each randomly selected from the range [minPort, maxPort].

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

PORT_RANGE_MIN

public static final int PORT_RANGE_MIN

The default minimum value for port ranges used when finding an available socket port.

另请参阅:

常量字段值

PORT_RANGE_MAX

public static final int PORT_RANGE_MAX

The default maximum value for port ranges used when finding an available socket port.

另请参阅:

常量字段值

构造器详细资料

SocketUtils

public SocketUtils()

Although SocketUtils consists solely of static utility methods, this constructor is intentionally public.

Rationale

Static methods from this class may be invoked from within XML configuration files using the Spring Expression Language (SpEL) and the following syntax.

<bean id="bean1" ... p:port="#{T(org.springframework.util.SocketUtils).findAvailableTcpPort(12000)}" />

If this constructor were private, you would be required to supply the fully qualified class name to SpEL's T() function for each usage. Thus, the fact that this constructor is public allows you to reduce boilerplate configuration with SpEL as can be seen in the following example.

<bean id="socketUtils" class="org.springframework.util.SocketUtils" />
 <bean id="bean1" ... p:port="#{socketUtils.findAvailableTcpPort(12000)}" />
 <bean id="bean2" ... p:port="#{socketUtils.findAvailableTcpPort(30000)}" />

方法详细资料

findAvailableTcpPort

public static int findAvailableTcpPort()

Find an available TCP port randomly selected from the range [1024, 65535].

返回:

an available TCP port number

抛出:

IllegalStateException - if no available port could be found

findAvailableTcpPort

public static int findAvailableTcpPort(int minPort)

Find an available TCP port randomly selected from the range [minPort, 65535].

参数:

minPort - the minimum port number

返回:

an available TCP port number

抛出:

IllegalStateException - if no available port could be found

findAvailableTcpPort

public static int findAvailableTcpPort(int minPort,
                                       int maxPort)

Find an available TCP port randomly selected from the range [minPort, maxPort].

参数:

minPort - the minimum port number

maxPort - the maximum port number

返回:

an available TCP port number

抛出:

IllegalStateException - if no available port could be found

findAvailableTcpPorts

public static SortedSet<Integer> findAvailableTcpPorts(int numRequested)

Find the requested number of available TCP ports, each randomly selected from the range [1024, 65535].

参数:

numRequested - the number of available ports to find

返回:

a sorted set of available TCP port numbers

抛出:

IllegalStateException - if the requested number of available ports could not be found

findAvailableTcpPorts

public static SortedSet<Integer> findAvailableTcpPorts(int numRequested,
                                                       int minPort,
                                                       int maxPort)

Find the requested number of available TCP ports, each randomly selected from the range [minPort, maxPort].

参数:

numRequested - the number of available ports to find

minPort - the minimum port number

maxPort - the maximum port number

返回:

a sorted set of available TCP port numbers

抛出:

IllegalStateException - if the requested number of available ports could not be found

findAvailableUdpPort

public static int findAvailableUdpPort()

Find an available UDP port randomly selected from the range [1024, 65535].

返回:

an available UDP port number

抛出:

IllegalStateException - if no available port could be found

findAvailableUdpPort

public static int findAvailableUdpPort(int minPort)

Find an available UDP port randomly selected from the range [minPort, 65535].

参数:

minPort - the minimum port number

返回:

an available UDP port number

抛出:

IllegalStateException - if no available port could be found

findAvailableUdpPort

public static int findAvailableUdpPort(int minPort,
                                       int maxPort)

Find an available UDP port randomly selected from the range [minPort, maxPort].

参数:

minPort - the minimum port number

maxPort - the maximum port number

返回:

an available UDP port number

抛出:

IllegalStateException - if no available port could be found

findAvailableUdpPorts

public static SortedSet<Integer> findAvailableUdpPorts(int numRequested)

Find the requested number of available UDP ports, each randomly selected from the range [1024, 65535].

参数:

numRequested - the number of available ports to find

返回:

a sorted set of available UDP port numbers

抛出:

IllegalStateException - if the requested number of available ports could not be found

findAvailableUdpPorts

public static SortedSet<Integer> findAvailableUdpPorts(int numRequested,
                                                       int minPort,
                                                       int maxPort)

Find the requested number of available UDP ports, each randomly selected from the range [minPort, maxPort].

参数:

numRequested - the number of available ports to find

minPort - the minimum port number

maxPort - the maximum port number

返回:

a sorted set of available UDP port numbers

抛出:

IllegalStateException - if the requested number of available ports could not be found