org.jfantasy.framework.util.common

Class NumberUtil

java.lang.Object

org.jfantasy.framework.util.common.NumberUtil

public class NumberUtil
extends java.lang.Object

数字处理集合类 主要功能：四舍五入，随机数，数字类型转换等方法

Field Summary

Fields

Modifier and Type	Field and Description
static int	INTEGER_MAX

Method Summary

Modifier and Type	Method and Description
static char	byte2char(byte b) 字节转换到字符
static java.lang.String	bytes2HexString(byte[] b) 从字节数组到十六进制字符串转换
static int	bytes2int(byte[] b) 字节数组到整数的转换
static java.lang.String	format(double num)
static byte[]	hexString2Bytes(java.lang.String hexstr) 从十六进制字符串到字节数组转换
static boolean	in(int n, int[] ins) 验证整数n是否在整数数组中
static boolean	in(long n, long[] ins)
static byte[]	int2bytes(int n) 整数到字节数组转换
static boolean	isEquals(java.math.BigDecimal left, java.math.BigDecimal right)
static boolean	isNumber(java.lang.String num) 判断num是否为数字
static java.lang.String	nullValue(java.lang.Integer num) int 转 string
static java.lang.String	nullValue(java.lang.Long num) long 转 string
static int	parse(char c) 解析字符
static java.lang.String	percent(double p1, double p2)
static float	randomFloat()
static int	randomInt()
static int	randomInt(int i)
static long	randomLong()
static double	round(double n, int w) 四舍五入方法
static java.lang.String	toChinese(int number)
static java.lang.String	toChinese(java.lang.String number)
static java.lang.String	toHex(int num)
static java.lang.Integer	toInteger(java.lang.String num)
static java.lang.Long	toLong(java.lang.String s, int radix)
static java.lang.String	toRMB(java.lang.String number)

Methods inherited from class java.lang.Object

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

Field Detail

INTEGER_MAX

public static final int INTEGER_MAX

See Also:

Constant Field Values

Method Detail

randomInt

public static int randomInt()

randomInt

public static int randomInt(int i)

randomFloat

public static float randomFloat()

randomLong

public static long randomLong()

toLong

public static java.lang.Long toLong(java.lang.String s,
                                    int radix)

toInteger

public static java.lang.Integer toInteger(java.lang.String num)

isNumber

public static boolean isNumber(java.lang.String num)

判断num是否为数字

Parameters:

num - 字符串

Returns:

{boolean}

round

public static double round(double n,
                           int w)

四舍五入方法

Parameters:

n - 值

w - 位数

Returns:

{double}

nullValue

public static java.lang.String nullValue(java.lang.Integer num)

int 转 string

Parameters:

num - 数值

Returns:

{String}

nullValue

public static java.lang.String nullValue(java.lang.Long num)

long 转 string

Parameters:

num - 数值

Returns:

{String}

percent

public static java.lang.String percent(double p1,
                                       double p2)

int2bytes

public static byte[] int2bytes(int n)

整数到字节数组转换

Parameters:

n - 整数

Returns:

{byte[]}

bytes2int

public static int bytes2int(byte[] b)

字节数组到整数的转换

Parameters:

b - 字节数组

Returns:

{int}

byte2char

public static char byte2char(byte b)

字节转换到字符

Parameters:

b - 字节

Returns:

{char}

parse

public static int parse(char c)

解析字符

Parameters:

c - 字符

Returns:

{int}

isEquals

public static boolean isEquals(java.math.BigDecimal left,
                               java.math.BigDecimal right)

toHex

public static java.lang.String toHex(int num)

bytes2HexString

public static java.lang.String bytes2HexString(byte[] b)

从字节数组到十六进制字符串转换

Parameters:

b - 字节数组

Returns:

{String}

hexString2Bytes

public static byte[] hexString2Bytes(java.lang.String hexstr)

从十六进制字符串到字节数组转换

Parameters:

hexstr - 字符串

Returns:

{byte[]}

in

public static boolean in(int n,
                         int[] ins)

验证整数n是否在整数数组中

Parameters:

n - 整数

ins - 整数数组

Returns:

{boolean}

in

public static boolean in(long n,
                         long[] ins)

format

public static java.lang.String format(double num)

toChinese

public static java.lang.String toChinese(int number)

toChinese

public static java.lang.String toChinese(java.lang.String number)

toRMB

public static java.lang.String toRMB(java.lang.String number)