trim string in java, remove white space

问题

<%=CMSStringUtility.toTitleCase(attrValues.getDisplayLabel())%>

this returns a string with a leading white space character that I need to remove. I believe this is JAVA in a jsp file. I tried the following:

<%=CMSStringUtility.toTitleCase(attrValues.getDisplayLabel()).trim()%>

and

<%=CMSStringUtility.toTitleCase(attrValues.getDisplayLabel().trim())%>

I am a JSP newbie, any ideas?

回答1:

If trim() does not remove a whitespace, it means it is not in the predefined list of whitespaces. This is usually a non-breaking space (code 160). Try to iterate the toCharArray() and see the ascii code of the space.

回答2:

trim only removes leading and trailing spaces. To remove other invisible characters you may use a regular expression.

来源：https://stackoverflow.com/questions/5758324/trim-string-in-java-remove-white-space