cn.lijunyi.logtracing.util

类 LogStringUtils

java.lang.Object

cn.lijunyi.logtracing.util.LogStringUtils

public class LogStringUtils
extends Object

版本:

1.0.0

字段概要

字段

限定符和类型	字段和说明
static String	EMPTY 空字符串

构造器概要

构造器

构造器和说明
LogStringUtils()

方法概要

限定符和类型	方法和说明
static boolean	isBlank(CharSequence cs) 判断字符串是否为空 StringUtils.isBlank(null) = true StringUtils.isBlank("") = true StringUtils.isBlank(" ") = true StringUtils.isBlank("bob") = false StringUtils.isBlank(" bob ") = false
static boolean	isEmpty(CharSequence cs) 判断一个字符串是否为空串 StringUtils.isEmpty(null) = true StringUtils.isEmpty("") = true StringUtils.isEmpty(" ") = false StringUtils.isEmpty("bob") = false StringUtils.isEmpty(" bob ") = false
static boolean	isEmpty(Map<?,?> map) * 判断一个Map是否为空
static boolean	isNotEmpty(String str) * 判断一个字符串是否为非空串
static boolean	isNotNull(Object object) * 判断一个对象是否非空
static boolean	isNull(Object object) * 判断一个对象是否为空
static String	join(Object[] array, String delimiter) StringUtils.join(null, *) = null StringUtils.join([], *) = "" StringUtils.join([null], *) = "" StringUtils.join(["a", "b", "c"], "--") = "a--b--c" StringUtils.join(["a", "b", "c"], null) = "abc" StringUtils.join(["a", "b", "c"], "") = "abc" StringUtils.join([null, "", "a"], ',') = ",,a"
static String	join(Object[] array, String delimiter, int startIndex, int endIndex) StringUtils.join(null, *, *, *) = null StringUtils.join([], *, *, *) = "" StringUtils.join([null], *, *, *) = "" StringUtils.join(["a", "b", "c"], "--", 0, 3) = "a--b--c" StringUtils.join(["a", "b", "c"], "--", 1, 3) = "b--c" StringUtils.join(["a", "b", "c"], "--", 2, 3) = "c" StringUtils.join(["a", "b", "c"], "--", 2, 2) = "" StringUtils.join(["a", "b", "c"], null, 0, 3) = "abc" StringUtils.join(["a", "b", "c"], "", 0, 3) = "abc" StringUtils.join([null, "", "a"], ',', 0, 3) = ",,a"
static int	length(CharSequence cs) 长度
static String	substring(String str, int start, int end) 剪切

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

EMPTY

public static final String EMPTY

空字符串

另请参阅:

常量字段值

构造器详细资料

LogStringUtils

public LogStringUtils()

方法详细资料

substring

public static String substring(String str,
                               int start,
                               int end)

剪切

参数:

str - 字符串

start - 开始

end - 结束

返回:

String

join

public static String join(Object[] array,
                          String delimiter)

StringUtils.join(null, *) = null StringUtils.join([], *) = "" StringUtils.join([null], *) = "" StringUtils.join(["a", "b", "c"], "--") = "a--b--c" StringUtils.join(["a", "b", "c"], null) = "abc" StringUtils.join(["a", "b", "c"], "") = "abc" StringUtils.join([null, "", "a"], ',') = ",,a"

参数:

array - 数组

delimiter - 分隔符

返回:

String

join

public static String join(Object[] array,
                          String delimiter,
                          int startIndex,
                          int endIndex)

StringUtils.join(null, *, *, *) = null StringUtils.join([], *, *, *) = "" StringUtils.join([null], *, *, *) = "" StringUtils.join(["a", "b", "c"], "--", 0, 3) = "a--b--c" StringUtils.join(["a", "b", "c"], "--", 1, 3) = "b--c" StringUtils.join(["a", "b", "c"], "--", 2, 3) = "c" StringUtils.join(["a", "b", "c"], "--", 2, 2) = "" StringUtils.join(["a", "b", "c"], null, 0, 3) = "abc" StringUtils.join(["a", "b", "c"], "", 0, 3) = "abc" StringUtils.join([null, "", "a"], ',', 0, 3) = ",,a"

参数:

array - 数组

delimiter - 分隔符

startIndex - 开始序号

endIndex - 结束序号

返回:

String

isNull

public static boolean isNull(Object object)

* 判断一个对象是否为空

参数:

object - Object

返回:

true：为空 false：非空

isNotNull

public static boolean isNotNull(Object object)

* 判断一个对象是否非空

参数:

object - Object

返回:

true：非空 false：空

isEmpty

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

* 判断一个Map是否为空

参数:

map - 要判断的Map

返回:

true：为空 false：非空

isEmpty

public static boolean isEmpty(CharSequence cs)

判断一个字符串是否为空串 StringUtils.isEmpty(null) = true StringUtils.isEmpty("") = true StringUtils.isEmpty(" ") = false StringUtils.isEmpty("bob") = false StringUtils.isEmpty(" bob ") = false

参数:

cs - 字符串

返回:

true：为空 false：非空

isNotEmpty

public static boolean isNotEmpty(String str)

* 判断一个字符串是否为非空串

参数:

str - String

返回:

true：非空串 false：空串

isBlank

public static boolean isBlank(CharSequence cs)

判断字符串是否为空 StringUtils.isBlank(null) = true StringUtils.isBlank("") = true StringUtils.isBlank(" ") = true StringUtils.isBlank("bob") = false StringUtils.isBlank(" bob ") = false

参数:

cs - cs

返回:

boolean

length

public static int length(CharSequence cs)

长度

参数:

cs - cs

返回:

int