com.github.bingoohuang.utils.lang

类 Mapp

java.lang.Object

com.github.bingoohuang.utils.lang.Mapp

public class Mapp
extends Object

构造器概要

构造器

构造器和说明
Mapp()

方法概要

限定符和类型	方法和说明
static Map<String,String>	createMap(String sep, String... keyValuePairs) 将形如{"k1:v2","k2:v2"}的字符串数组，转换为Map.
static <K,V> Map<K,V>	desc(Object obj)
static <K,V> V	firstNonNull(Map<K,V> map, String... keys) 从map中按照key列表提取第一个非null的值。
static Integer	getInt(Map m, Object key)
static Long	getLong(Map m, Object key)
static Number	getNum(Map m, Object key)
static String	getStr(Map m, Object key)
static String	getStr(Map m, Object key, String defaultValue)
static boolean	isEmpty(Map<?,?> map)
static Map<Object,Object>	map(Object... keyAndValues)
static Map	mapFromList(List<Map> list, String keyKey, String valueKey)
static <K,V> Map<K,V>	newHashMap()
static <K,V> Map<K,V>	of(K k1, V v1)
static <K,V> Map<K,V>	of(K k1, V v1, K k2, V v2)
static <K,V> Map<K,V>	of(K k1, V v1, K k2, V v2, K k3, V v3)
static <K,V> Map<K,V>	of(K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4)
static <K,V> Map<K,V>	of(K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4, K k5, V v5)
static <K,V> Map<K,V>	of(K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4, K k5, V v5, K k6, V v6)
static <T> Map<T,T>	of(T... keyAndValues)
static <T> T	spec(Map map, Class<T> clz)

从类继承的方法 java.lang.Object

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

构造器详细资料

Mapp

public Mapp()

方法详细资料

createMap

public static Map<String,String> createMap(String sep,
                                           String... keyValuePairs)

将形如{"k1:v2","k2:v2"}的字符串数组，转换为Map.

参数:

sep - 分隔符

keyValuePairs - 键值对

返回:

Map

firstNonNull

public static <K,V> V firstNonNull(Map<K,V> map,
                                   String... keys)

从map中按照key列表提取第一个非null的值。

类型参数:

K - the type of keys maintained by this map

V - the type of mapped values

参数:

map - Map

keys - key列表

返回:

第一个非null的值。如果没有找到，返回null。

of

public static <K,V> Map<K,V> of(K k1,
                                V v1)

of

public static <K,V> Map<K,V> of(K k1,
                                V v1,
                                K k2,
                                V v2)

of

public static <K,V> Map<K,V> of(K k1,
                                V v1,
                                K k2,
                                V v2,
                                K k3,
                                V v3)

of

public static <K,V> Map<K,V> of(K k1,
                                V v1,
                                K k2,
                                V v2,
                                K k3,
                                V v3,
                                K k4,
                                V v4)

of

public static <K,V> Map<K,V> of(K k1,
                                V v1,
                                K k2,
                                V v2,
                                K k3,
                                V v3,
                                K k4,
                                V v4,
                                K k5,
                                V v5)

of

public static <K,V> Map<K,V> of(K k1,
                                V v1,
                                K k2,
                                V v2,
                                K k3,
                                V v3,
                                K k4,
                                V v4,
                                K k5,
                                V v5,
                                K k6,
                                V v6)

of

public static <T> Map<T,T> of(T... keyAndValues)

map

public static Map<Object,Object> map(Object... keyAndValues)

newHashMap

public static <K,V> Map<K,V> newHashMap()

isEmpty

public static boolean isEmpty(Map<?,?> map)

getStr

public static String getStr(Map m,
                            Object key)

getStr

public static String getStr(Map m,
                            Object key,
                            String defaultValue)

getNum

public static Number getNum(Map m,
                            Object key)

getInt

public static Integer getInt(Map m,
                             Object key)

getLong

public static Long getLong(Map m,
                           Object key)

desc

public static <K,V> Map<K,V> desc(Object obj)

spec

public static <T> T spec(Map map,
                         Class<T> clz)

mapFromList

public static Map mapFromList(List<Map> list,
                              String keyKey,
                              String valueKey)