code.ponfee.commons.util

类 ObjectUtils

java.lang.Object

code.ponfee.commons.util.ObjectUtils

public final class ObjectUtils
extends Object

Object utilities

作者:

Ponfee

构造器概要

构造器

构造器和说明
ObjectUtils()

方法概要

限定符和类型	方法和说明
static <T> T	cast(Object value, Class<T> type) Returns target type value from origin value cast
static int	compare(Object a, Object b) Compare two object numerically
static <T> void	copy(T source, T target, String... fields) Copies source fields value to target fields
static <T> T	copyOf(T source, String... fields) Returns a new instance of copy from spec fields
static String	getStackTrace()
static String	getStackTrace(int deepPath) 获取堆栈信息
static String	getStackTrace(Thread thread)
static Object	getValue(Object obj, String name) Gets the target's name value
static boolean	isEmpty(Object o) 判断对象是否为空
static boolean	isNotBeanType(Class<?> type) Returns the type is not a bean type
static <T> T	newInstance(Class<T> type) Returns a new instance of type
static <T> Predicate<T>	not(Predicate<T> target)
static String	toString(Object obj) Returns object toString
static String	toString(Object obj, String defaultStr)
static <T> Class<T>	typeOf(T obj)
static byte[]	uuid() uuid byte array
static String	uuid22() 22位uuid
static String	uuid32() uuid 32 string

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

ObjectUtils

public ObjectUtils()

方法详细资料

toString

public static String toString(Object obj)

Returns object toString

参数:

obj - the target object

返回:

the string of object

toString

public static String toString(Object obj,
                              String defaultStr)

compare

public static int compare(Object a,
                          Object b)

Compare two object numerically

参数:

a - the object a

b - the object b

返回:

0(a==b), 1(a>b), -1(a

typeOf

public static <T> Class<T> typeOf(T obj)

not

public static <T> Predicate<T> not(Predicate<T> target)

isEmpty

public static boolean isEmpty(Object o)

判断对象是否为空

参数:

o - the object

返回:

true is empty

getValue

public static Object getValue(Object obj,
                              String name)

Gets the target's name value

参数:

obj - the object

name - the field name

返回:

a value

cast

public static <T> T cast(Object value,
                         Class<T> type)

Returns target type value from origin value cast

参数:

value - source object

type - target object type

返回:

target type object

另请参阅:

com.alibaba.fastjson.util.TypeUtils#castToInt(Object)

uuid

public static byte[] uuid()

uuid byte array

返回:

uuid32

public static String uuid32()

uuid 32 string

返回:

uuid22

public static String uuid22()

22位uuid

返回:

getStackTrace

public static String getStackTrace(int deepPath)

获取堆栈信息

参数:

deepPath - the deep path

返回:

stack trace

getStackTrace

public static String getStackTrace()

getStackTrace

public static String getStackTrace(Thread thread)

copy

public static <T> void copy(T source,
                            T target,
                            String... fields)

Copies source fields value to target fields

参数:

source - the source

target - the target

fields - the fields of String array

copyOf

public static <T> T copyOf(T source,
                           String... fields)

Returns a new instance of copy from spec fields

参数:

source - the source

fields - the fields

返回:

newInstance

public static <T> T newInstance(Class<T> type)

Returns a new instance of type

参数:

type - the type class

返回:

a new instance

isNotBeanType

public static boolean isNotBeanType(Class<?> type)

Returns the type is not a bean type

参数:

type - the type class

返回:

true assert is not a bean type