xin.allonsy.utils

类 CommonUtil

java.lang.Object

xin.allonsy.utils.CommonUtil

public class CommonUtil
extends Object

CommonUtil

作者:

wangshuai

构造器概要

构造器

构造器和说明
CommonUtil()

方法概要

限定符和类型	方法和说明
static <T> List<List<T>>	chunkList(List<T> list, int chunkSize) 列表分片
static void	copyPropertiesIgnoreNull(Object src, Object target) bean copy 为null的字段不copy
private static String[]	getNullPropertyNames(Object source)
static String	limitedString(String str, int lengthLimit)
private static <T> T	selectKeyByWeight(Map<T,Integer> map) 根据权重随机选择 map的value为权重值
static String	stackTraceToString(Throwable e) 异常堆栈toStirng

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

CommonUtil

public CommonUtil()

方法详细资料

limitedString

public static String limitedString(String str,
                                   int lengthLimit)

selectKeyByWeight

private static <T> T selectKeyByWeight(Map<T,Integer> map)

根据权重随机选择 map的value为权重值

类型参数:

T -

参数:

map -

返回:

chunkList

public static <T> List<List<T>> chunkList(List<T> list,
                                          int chunkSize)

列表分片

类型参数:

T -

参数:

list -

chunkSize -

返回:

stackTraceToString

public static String stackTraceToString(Throwable e)

异常堆栈toStirng

参数:

e -

返回:

copyPropertiesIgnoreNull

public static void copyPropertiesIgnoreNull(Object src,
                                            Object target)

bean copy 为null的字段不copy

参数:

src -

target -

getNullPropertyNames

private static String[] getNullPropertyNames(Object source)