（十七）Java工具类StringUtils的equals、equalsIgnoreCase、equalsAny、equalsAnyIgnoreCase方法详解

1.equals方法比较两个字符串是否相等

public static boolean equals(CharSequence cs1, CharSequence cs2)
{
if (cs1 == cs2) {
return true;
}
if ((cs1 == null) || (cs2 == null)) {
return false;
}
if (cs1.length() != cs2.length()) {
return false;
}
if (((cs1 instanceof String)) && ((cs2 instanceof String))) {
return cs1.equals(cs2);
}
return CharSequenceUtils.regionMatches(cs1, false, 0, cs2, 0, cs1.length());
}

2.equalsIgnoreCase方法比较两个字符串是否相等并且忽略大小写

public static boolean equalsIgnoreCase(CharSequence str1, CharSequence str2)
{
if ((str1 == null) || (str2 == null))
return str1 == str2;
if (str1 == str2)
return true;
if (str1.length() != str2.length()) {
return false;
}
return CharSequenceUtils.regionMatches(str1, true, 0, str2, 0, str1.length());
}

3.equalsAny方法比较字符串与给定的数组中的任何一个字符串相等就返回true

public static boolean equalsAny(CharSequence string, CharSequence... searchStrings)
{
if (ArrayUtils.isNotEmpty(searchStrings)) {
for (CharSequence next : searchStrings) {
if (equals(string, next)) {
return true;
}
}
}
return false;
}

4.equalsAnyIgnoreCase方法比较字符串与给定的数组中任何一个字符串相等就返回true

public static boolean equalsAnyIgnoreCase(CharSequence string, CharSequence... searchStrings)
{
if (ArrayUtils.isNotEmpty(searchStrings)) {
for (CharSequence next : searchStrings) {
if (equalsIgnoreCase(string, next)) {
return true;
}
}
}
return false;
}