com.fr.general

类 ComparatorUtils

java.lang.Object

com.fr.general.ComparatorUtils

public class ComparatorUtils
extends java.lang.Object

Some util methods for Comparator.

方法概要

方法

限定符和类型	方法和说明
static boolean	arg1InArg2(java.lang.Object o1, java.lang.Object o2)
static int	compare(java.util.Comparator comparator, java.lang.Object obj1, java.lang.Object obj2)
static int	compare(double d1, double d2)
static int	compare(java.lang.Object obj1, java.lang.Object obj2) Compares its two arguments for order.
static int	compare(java.lang.Object obj1, java.lang.Object obj2, java.util.Comparator comparator)
static int	compareCommonType(java.lang.Object obj1, java.lang.Object obj2) 一个通用的比较器,比较规则为(null->空->先数字->再大写英文->小写英文->中文->)日期类型按照日期大小 字符串比较时,从第一个字符开始比较直到比较出一个非0的结果,如果比完了还没有就判定相等
static int	compareSQLType(java.lang.Object obj1, java.lang.Object obj2) 比较从数据库中取出的对象,但只比较了数值，字符串，Date, boolean类型，其他类型抛异常 没有严格遵守传递性，特殊情况下会有问题。"
static boolean	equals_exactly(java.lang.Object obj1, java.lang.Object obj2)
static boolean	equals(boolean[] array1, boolean[] array2)
static boolean	equals(byte[] array1, byte[] array2)
static boolean	equals(char[] array1, char[] array2)
static boolean	equals(double[] array1, double[] array2)
static boolean	equals(int[] array1, int[] array2)
static boolean	equals(java.util.Iterator it1, java.util.Iterator it2)
static boolean	equals(long[] array1, long[] array2)
static boolean	equals(java.lang.Object[] array1, java.lang.Object[] array2)
static boolean	equals(java.lang.Object obj1, java.lang.Object obj2) peter:比较相等.
static boolean	equals(java.lang.String obj1, java.lang.String obj2) peter:比较相等.
static boolean	equalsIgnoreCase(java.lang.String obj1, java.lang.String obj2) 比较两个字符串在无视大小写的情况下是否相等.
static boolean	tableDataColumnNameEquals(java.lang.String name1, java.lang.String name2)

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

compare

public static int compare(java.lang.Object obj1,
          java.lang.Object obj2)

Compares its two arguments for order. Returns a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.

参数:

obj1 - the first object to be compared.(The value of obj1 may be null).

obj2 - the second object to be compared.(The value of obj2 may be null).

返回:

a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.

compare

public static int compare(java.lang.Object obj1,
          java.lang.Object obj2,
          java.util.Comparator comparator)

compareSQLType

public static int compareSQLType(java.lang.Object obj1,
                 java.lang.Object obj2)
                          throws java.lang.IllegalArgumentException

比较从数据库中取出的对象,但只比较了数值，字符串，Date, boolean类型，其他类型抛异常 没有严格遵守传递性，特殊情况下会有问题。"2014/4/10" > new Date("2014/4/9") > "2014/4/8"，但"2014/4/10" < "2014/4/8"

参数:

obj1 - 第一个被比较的对象

obj2 - 第二个被比较的对象

返回:

相等时返回0，obj1 > obj2返回正值，否则返回负值

抛出:

java.lang.IllegalArgumentException

compare

public static int compare(double d1,
          double d2)

compare

public static int compare(java.util.Comparator comparator,
          java.lang.Object obj1,
          java.lang.Object obj2)

arg1InArg2

public static boolean arg1InArg2(java.lang.Object o1,
                 java.lang.Object o2)

equalsIgnoreCase

public static boolean equalsIgnoreCase(java.lang.String obj1,
                       java.lang.String obj2)

比较两个字符串在无视大小写的情况下是否相等. 已做空值判断

参数:

obj1 - 字符串对象1

obj2 - 字符串对象2

equals

public static boolean equals(java.lang.String obj1,
             java.lang.String obj2)

peter:比较相等.

参数:

obj1 - may be null.

obj2 - may be null.

equals

public static boolean equals(java.lang.Object obj1,
             java.lang.Object obj2)

peter:比较相等.

参数:

obj1 - may be null.

obj2 - may be null.

equals_exactly

public static boolean equals_exactly(java.lang.Object obj1,
                     java.lang.Object obj2)

tableDataColumnNameEquals

public static boolean tableDataColumnNameEquals(java.lang.String name1,
                                java.lang.String name2)

equals

public static boolean equals(java.util.Iterator it1,
             java.util.Iterator it2)

equals

public static boolean equals(java.lang.Object[] array1,
             java.lang.Object[] array2)

equals

public static boolean equals(int[] array1,
             int[] array2)

equals

public static boolean equals(long[] array1,
             long[] array2)

equals

public static boolean equals(double[] array1,
             double[] array2)

equals

public static boolean equals(byte[] array1,
             byte[] array2)

equals

public static boolean equals(char[] array1,
             char[] array2)

equals

public static boolean equals(boolean[] array1,
             boolean[] array2)

compareCommonType

public static int compareCommonType(java.lang.Object obj1,
                    java.lang.Object obj2)

一个通用的比较器,比较规则为(null->空->先数字->再大写英文->小写英文->中文->)日期类型按照日期大小 字符串比较时,从第一个字符开始比较直到比较出一个非0的结果,如果比完了还没有就判定相等

参数:

obj1 - 对象1

obj2 - 对象2

返回:

比较结果