JAVA基础-StringUtils

依赖

<!--        commons-->
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-lang3</artifactId>
    <version>3.10</version>
</dependency>

举例

import org.apache.commons.lang3.StringUtils;
StringUtils.contains("abc", "")   = true
StringUtils.contains("abc", "a")  = true
StringUtils.contains("abc", "A") = true
StringUtils.contains("abc", 'a') = true
StringUtils.contains("abc", 'z') = false
//检查字符序列(CharSequence)是否包含给定数组中的任何字符序列
//boolean containsAny(final CharSequence cs, final char... searchChars)
StringUtils.containsAny("zzabyycdxx", "za") = true
StringUtils.containsAny("zzabyycdxx", "by") = true
StringUtils.containsAny("abcd", "ab", "cd") = true
StringUtils.containsAny("abc", "d", "abc")  = true
StringUtils.containsAny("zzabyycdxx",'z','a') = true
StringUtils.containsAny("zzabyycdxx",'b','y') = true
StringUtils.containsAny("aba", 'z')           = false
//检查字符序列(CharSequence)是否只包含某些字符
//boolean containsOnly(final CharSequence cs, final char... valid)
StringUtils.containsOnly("ab", '')      = false
StringUtils.containsOnly("abab", 'abc') = true
StringUtils.containsOnly("ab1", 'abc')  = false
StringUtils.containsOnly("abz", 'abc')  = false
//检查字符序列(CharSequence)不包含某些字符 
//boolean containsNone(final CharSequence cs, final char... searchChars)
StringUtils.containsNone("ab","")       = true
StringUtils.containsNone("abab","xyz")  = true
StringUtils.containsNone("ab1", "xyz")  = true
StringUtils.containsNone("abz", "xyz")  = false
//检查字符序列是否以指定的前缀开始
StringUtils.startsWith("abcdef", null)  = false
StringUtils.startsWith("abcdef", "abc") = true
StringUtils.startsWith("ABCDEF", "abc") = false

// 判断集合中包含
String[] slist = {"a", "b", "c", "d", "e", "f", "g"};
boolean b = StringUtils.containsAny("g", slist);//true

String s1 = "123";
String s2 = "123";
//判断s1中是否包含s2
boolean contains = StringUtils.contains(s1, s2);