cn.hutool.core.comparator

Class VersionComparator

java.lang.Object

cn.hutool.core.comparator.VersionComparator

All Implemented Interfaces:

Serializable, Comparator<String>

public class VersionComparator
extends Object
implements Comparator<String>, Serializable

版本比较器
比较两个版本的大小
排序时版本从小到大排序，即比较时小版本在前，大版本在后
支持如：1.3.20.8，6.82.20160101，8.5a/8.5c等版本形式
参考：java.lang.module.ModuleDescriptor.Version

Since:

4.0.2

Author:

Looly

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static VersionComparator	INSTANCE 单例

Constructor Summary

Constructors

Constructor and Description
VersionComparator() 默认构造

Method Summary

Modifier and Type	Method and Description
int	compare(String version1, String version2) 比较两个版本 null版本排在最小：即： compare(null, "v1") < 0 compare("v1", "v1") = 0 compare(null, null) = 0 compare("v1", null) > 0 compare("1.0.0", "1.0.2") < 0 compare("1.0.2", "1.0.2a") < 0 compare("1.0.3", "1.0.2a") > 0 compare("1.13.0", "1.12.1c") > 0 compare("V0.0.20170102", "V0.0.20170101") > 0

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Field Detail

INSTANCE

public static final VersionComparator INSTANCE

单例

Constructor Detail

VersionComparator

public VersionComparator()

默认构造

Method Detail

compare

public int compare(String version1,
                   String version2)

比较两个版本
null版本排在最小：即：

 compare(null, "v1") < 0
 compare("v1", "v1")  = 0
 compare(null, null)   = 0
 compare("v1", null) > 0
 compare("1.0.0", "1.0.2") < 0
 compare("1.0.2", "1.0.2a") < 0
 compare("1.0.3", "1.0.2a") > 0
 compare("1.13.0", "1.12.1c") > 0
 compare("V0.0.20170102", "V0.0.20170101") > 0
 

Specified by:

compare in interface Comparator<String>

Parameters:

version1 - 版本1

version2 - 版本2