//The effect is the same as the first method
StringUtils.substring("hello world", 4); // Return value, intercepted from bit 4 to the end of the string: o whole
StringUtils.substring("hello world", 4, 10); // Return value, intercepting from bit 4 to bit 10: o wrol
//Seave the characters before a string
StringUtils.substringBefore("hello world", "l"); //The result is: he Here is the first "l"
StringUtils.substringBeforeLast("hello world", "l"); //The result is: hello wor Here the last "l" is used as the standard
//Seave the characters after a string
StringUtils.substringAfter("hello world", "l"); //The result is: lo world Here is the first "l" as the standard
StringUtils.substringAfterLast("hello world", "l"); //The result is: d Here is the last "l" as the standard
//Seave the characters between two strings
StringUtils.substringBetween("hello world", "o"); //The result is: w string between two os
StringUtils.substringBetween("hello world", "l", "r"); //The result is: lo wo string between the first character "l" and the first character "r"
StringUtils.substringsBetween("hello world", "l", "r"); //The result is: The string between the first character "l" and the first character "r" is returned in an array. It needs to be used () to display [lo wo], otherwise it is the address value.
