程序包 com.alibaba.nacos.common.utils

类 ConvertUtils

java.lang.Object
com.alibaba.nacos.common.utils.ConvertUtils
public final class ConvertUtils extends Object
Value Convert Utils.
作者:
liaochuntao

  • 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​(String str)
    Converts a String to a boolean (optimised for performance).
    static boolean
    toBoolean​(String val, boolean defaultValue)
    Convert String value to boolean value if parameter value is legal.
    static Boolean
    toBooleanObject​(String str)
    Converts a String to a Boolean.
    static int
    toInt​(String val)
    Convert String value to int value if parameter value is legal.
    static int
    toInt​(String val, int defaultValue)
    Convert String value to int value if parameter value is legal.
    static long
    toLong​(Object val)
    Convert Object value to long value if parameter value is legal.
    static long
    toLong​(String val)
    Convert String value to long value if parameter value is legal.
    static long
    toLong​(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

  • 构造器详细资料

    • ConvertUtils

      public ConvertUtils()

  • 方法详细资料

    • toInt

      public static int toInt​(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​(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​(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​(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​(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​(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​(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 Boolean toBooleanObject​(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