程序包 com.alibaba.nacos.common.utils

类 ConvertUtils

java.lang.Object

com.alibaba.nacos.common.utils.ConvertUtils

public final class ConvertUtils
extends java.lang.Object

Value Convert Utils.

作者:

liaochuntao

字段概要

字段

修饰符和类型	字段	说明
static java.util.Set<java.lang.String>	FALSE_SET
private static java.lang.String	NULL_STR
static java.util.Set<java.lang.String>	TRUE_SET

构造器概要

构造器

构造器	说明
ConvertUtils()

方法概要

修饰符和类型	方法	说明
static boolean	toBoolean(java.lang.String str)	Converts a String to a boolean (optimised for performance).
static boolean	toBoolean(java.lang.String val, boolean defaultValue)	Convert String value to boolean value if parameter value is legal.
static java.lang.Boolean	toBooleanObject(java.lang.String str)	Converts a String to a Boolean.
static int	toInt(java.lang.String val)	Convert String value to int value if parameter value is legal.
static int	toInt(java.lang.String val, int defaultValue)	Convert String value to int value if parameter value is legal.
static long	toLong(java.lang.Object val)	Convert Object value to long value if parameter value is legal.
static long	toLong(java.lang.String val)	Convert String value to long value if parameter value is legal.
static long	toLong(java.lang.String val, long defaultValue)	Convert String value to long value if parameter value is legal.

从类继承的方法 java.lang.Object

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

字段详细资料

NULL_STR

private static final java.lang.String NULL_STR

另请参阅:

常量字段值

TRUE_SET

public static final java.util.Set<java.lang.String> TRUE_SET

FALSE_SET

public static final java.util.Set<java.lang.String> FALSE_SET

构造器详细资料

ConvertUtils

public ConvertUtils()

方法详细资料

toInt

public static int toInt(java.lang.String val)

Convert String value to int value if parameter value is legal. And it automatically defaults to 0 if parameter value is null or blank str.

参数:

val - String value which need to be converted to int value.

返回:

Converted int value and its default value is 0.

toInt

public static int toInt(java.lang.String val,
                        int defaultValue)

Convert String value to int value if parameter value is legal. And return default value if parameter value is null or blank str.

参数:

val - value

defaultValue - default value

返回:

int value if input value is legal, otherwise default value

toLong

public static long toLong(java.lang.Object val)

Convert Object value to long value if parameter value is legal. And it automatically defaults to 0 if parameter value is null or other object.

参数:

val - object value

返回:

Converted long value and its default value is 0.

toLong

public static long toLong(java.lang.String val)

Convert String value to long value if parameter value is legal. And it automatically defaults to 0 if parameter value is null or blank str.

参数:

val - String value which need to be converted to int value.

返回:

Converted long value and its default value is 0.

toLong

public static long toLong(java.lang.String val,
                          long defaultValue)

Convert String value to long value if parameter value is legal. And return default value if parameter value is null or blank str.

参数:

val - value

defaultValue - default value

返回:

long value if input value is legal, otherwise default value

toBoolean

public static boolean toBoolean(java.lang.String val,
                                boolean defaultValue)

Convert String value to boolean value if parameter value is legal. And return default value if parameter value is null or blank str.

参数:

val - value

defaultValue - default value

返回:

boolean value if input value is legal, otherwise default value

toBoolean

public static boolean toBoolean(java.lang.String str)

Converts a String to a boolean (optimised for performance).

'true', 'on', 'y', 't' or 'yes' (case insensitive) will return true. Otherwise, false is returned.

This method performs 4 times faster (JDK1.4) than Boolean.valueOf(String). However, this method accepts 'on' and 'yes', 't', 'y' as true values.

   BooleanUtils.toBoolean(null)    = false
   BooleanUtils.toBoolean("true")  = true
   BooleanUtils.toBoolean("TRUE")  = true
   BooleanUtils.toBoolean("tRUe")  = true
   BooleanUtils.toBoolean("on")    = true
   BooleanUtils.toBoolean("yes")   = true
   BooleanUtils.toBoolean("false") = false
   BooleanUtils.toBoolean("x gti") = false
   BooleanUtils.toBooleanObject("y") = true
   BooleanUtils.toBooleanObject("n") = false
   BooleanUtils.toBooleanObject("t") = true
   BooleanUtils.toBooleanObject("f") = false
 

参数:

str - the String to check

返回:

the boolean value of the string, false if no match or the String is null

toBooleanObject

public static java.lang.Boolean toBooleanObject(java.lang.String str)

Converts a String to a Boolean.

'true', 'on', 'y', 't' or 'yes' (case insensitive) will return true. 'false', 'off', 'n', 'f' or 'no' (case insensitive) will return false. Otherwise, null is returned.

NOTE: This returns null and will throw a NullPointerException if autoboxed to a boolean.

   // N.B. case is not significant
   BooleanUtils.toBooleanObject(null)    = null
   BooleanUtils.toBooleanObject("true")  = Boolean.TRUE
   BooleanUtils.toBooleanObject("T")     = Boolean.TRUE // i.e. T[RUE]
   BooleanUtils.toBooleanObject("false") = Boolean.FALSE
   BooleanUtils.toBooleanObject("f")     = Boolean.FALSE // i.e. f[alse]
   BooleanUtils.toBooleanObject("No")    = Boolean.FALSE
   BooleanUtils.toBooleanObject("n")     = Boolean.FALSE // i.e. n[o]
   BooleanUtils.toBooleanObject("on")    = Boolean.TRUE
   BooleanUtils.toBooleanObject("ON")    = Boolean.TRUE
   BooleanUtils.toBooleanObject("off")   = Boolean.FALSE
   BooleanUtils.toBooleanObject("oFf")   = Boolean.FALSE
   BooleanUtils.toBooleanObject("yes")   = Boolean.TRUE
   BooleanUtils.toBooleanObject("Y")     = Boolean.TRUE // i.e. Y[ES]
   BooleanUtils.toBooleanObject("blue")  = null
   BooleanUtils.toBooleanObject("true ") = null // trailing space (too long)
   BooleanUtils.toBooleanObject("ono")   = null // does not match on or no
 

参数:

str - the String to check; upper and lower case are treated as the same

返回:

the Boolean value of the string, null if no match or null input