Package org.qiunet.utils.common

Class CommonUtil

java.lang.Object

org.qiunet.utils.common.CommonUtil

public class CommonUtil
extends Object

其它可以通用逻辑的工具类

Author:

qiunet

Method Summary

Modifier and Type	Method	Description
static <T> boolean	existInList(T element, Collection<T> list)	检查一个元素是否在集合中
static <T> boolean	existInList(T element, T... arrays)	检查一个元素是否在数组中
static <T> List<T>	getSubListPage(List<T> list, int skip, int count)	截取某列表的部分数据
static boolean	isEmpty(Collection<?> collection)	集合是否为空
static boolean	isEmptyMap(Map<?,?> map)	map 是否是空
static boolean	isNotEmpty(Collection<?> collection)	集合是否不为空
static boolean	isNotEmptyMap(Map<?,?> map)	是否非空map
static void	reverse(byte[] array)	翻转换整个数组
static void	reverse(byte[] array, int step)
static void	reverse(int[] array)	翻转换整个数组

Methods inherited from class java.lang.Object

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

Method Details

existInList

@SafeVarargs
public static <T> boolean existInList(T element,
 T... arrays)

检查一个元素是否在数组中

Type Parameters:

T - 元素T

Parameters:

arrays - 是否在数组中

Returns:

existInList

public static <T> boolean existInList(T element,
 Collection<T> list)

检查一个元素是否在集合中

Type Parameters:

T -

Parameters:

element -

list -

Returns:

getSubListPage

public static <T> List<T> getSubListPage(List<T> list,
 int skip,
 int count)

截取某列表的部分数据

Parameters:

list - 原始list

skip - 从skip 开始

count - 截取数

Returns:

reverse

public static void reverse(byte[] array)

翻转换整个数组

Parameters:

array -

reverse

public static void reverse(byte[] array,
 int step)

reverse

public static void reverse(int[] array)

翻转换整个数组

Parameters:

array -

isEmptyMap

public static boolean isEmptyMap(Map<?,?> map)

map 是否是空

Parameters:

map -

Returns:

isNotEmptyMap

public static boolean isNotEmptyMap(Map<?,?> map)

是否非空map

Parameters:

map -

Returns:

isNotEmpty

public static boolean isNotEmpty(Collection<?> collection)

集合是否不为空

Parameters:

collection -

Returns:

isEmpty

public static boolean isEmpty(Collection<?> collection)

集合是否为空

Parameters:

collection -

Returns: