com.centit.support.algorithm

类 GeneralAlgorithm

java.lang.Object

com.centit.support.algorithm.GeneralAlgorithm

public abstract class GeneralAlgorithm
extends Object

Created by codefan on 17-9-7.

作者:

codefan

方法概要

限定符和类型	方法和说明
static Object	addTwoObject(Object a, Object b)
static Object	addTwoObject(Object a, Object b, boolean nullSensitive) 将两个对象加+起来，可能是数字相加，也可能是字符串连接
static boolean	betweenTwoObject(Object operand, Object obj1, Object obj2)
static Object	castObjectToType(Object obj, Class<?> type)
static <T extends Comparable<? super T>> int	compareTwoComparableObject(T l1, T l2)
static <T extends Comparable<? super T>> int	compareTwoComparableObject(T l1, T l2, boolean nullAsFirst) int compare(final T c1, final T c2) 等价于 ObjectUtils.compare
static int	compareTwoObject(Object operand, Object operand2)
static int	compareTwoObject(Object operand, Object operand2, boolean nullAsFirst)
static int	compareTwoObjectByField(Object data1, Object data2, String[] fields, boolean nullAsFirst)
static <T,U extends Comparable<? super U>> Comparator<T>	comparing(Function<? super T,? extends U> keyExtractor, boolean nullAsFirst)
static Object	divideTwoObject(Object a, Object b)
static boolean	equals(Object operand, Object operand2)
static boolean	equals(Object operand, Object operand2, boolean allNullAsTrue) return (a == b) or (a !
static boolean	isEmpty(Object obj) 功能：判断对象是否为空 类似于 CollectionUtils.isEmpty(Object obj)
static Object	maxObject(Collection<Object> ar)
static Object	minObject(Collection<Object> ar)
static Object	modTwoObject(Object a, Object b)
static Object	multiplyTwoObject(Object a, Object b)
static <T> T	nvl(T obj, T obj2)
static <T> T	nvl2(Object obj, T obj2, T obj3)
static Object	subtractTwoObject(Object a, Object b)
static Object	sumObjects(Collection<Object> ar)

从类继承的方法 java.lang.Object

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

方法详细资料

nvl

public static <T> T nvl(T obj,
                        T obj2)

nvl2

public static <T> T nvl2(Object obj,
                         T obj2,
                         T obj3)

equals

public static boolean equals(Object operand,
                             Object operand2,
                             boolean allNullAsTrue)

return (a == b) or (a != null and a.equals(b));

参数:

operand - an object

operand2 - an object to be compared with a for equality

allNullAsTrue - 两个参数都是null时返回 true

返回:

true if the arguments are equal to each other and false otherwise

另请参阅:

equals

equals

public static boolean equals(Object operand,
                             Object operand2)

compareTwoObject

public static int compareTwoObject(Object operand,
                                   Object operand2,
                                   boolean nullAsFirst)

compareTwoObject

public static int compareTwoObject(Object operand,
                                   Object operand2)

betweenTwoObject

public static boolean betweenTwoObject(Object operand,
                                       Object obj1,
                                       Object obj2)

compareTwoObjectByField

public static int compareTwoObjectByField(Object data1,
                                          Object data2,
                                          String[] fields,
                                          boolean nullAsFirst)

compareTwoComparableObject

public static <T extends Comparable<? super T>> int compareTwoComparableObject(T l1,
                                                                               T l2,
                                                                               boolean nullAsFirst)

int compare(final T c1, final T c2) 等价于 ObjectUtils.compare

类型参数:

T - 比较对对象类型

参数:

l1 - 参数1

l2 - 参数2

nullAsFirst - true null 在最前面否则在最后面

返回:

返回比较值 0 相等 1 大于 -1 小于

另请参阅:

compare

compareTwoComparableObject

public static <T extends Comparable<? super T>> int compareTwoComparableObject(T l1,
                                                                               T l2)

comparing

public static <T,U extends Comparable<? super U>> Comparator<T> comparing(Function<? super T,? extends U> keyExtractor,
                                                                          boolean nullAsFirst)

类型参数:

T - 比较对象类型

U - 比较主键类型

参数:

keyExtractor - 获取主键方法

nullAsFirst - true null 在最前面否则在最后面

返回:

比较结果

addTwoObject

public static Object addTwoObject(Object a,
                                  Object b,
                                  boolean nullSensitive)

将两个对象加+起来，可能是数字相加，也可能是字符串连接

参数:

a - object1

b - object2

nullSensitive - 在数字计算是null敏感，就是有一个数为null则结果为null

返回:

相加结果

addTwoObject

public static Object addTwoObject(Object a,
                                  Object b)

subtractTwoObject

public static Object subtractTwoObject(Object a,
                                       Object b)

multiplyTwoObject

public static Object multiplyTwoObject(Object a,
                                       Object b)

divideTwoObject

public static Object divideTwoObject(Object a,
                                     Object b)

modTwoObject

public static Object modTwoObject(Object a,
                                  Object b)

maxObject

public static Object maxObject(Collection<Object> ar)

minObject

public static Object minObject(Collection<Object> ar)

sumObjects

public static Object sumObjects(Collection<Object> ar)

castObjectToType

public static Object castObjectToType(Object obj,
                                      Class<?> type)

isEmpty

public static boolean isEmpty(Object obj)

功能：判断对象是否为空 类似于 CollectionUtils.isEmpty(Object obj)

参数:

obj - 被判断的对象

返回:

是否为空