1.正则表达式的字符串表示
String mobileRegex = "^1(3|4|5|7|8)\\d{9}$";
字符^意义：表示匹配的字符必须在最前边；
字符$意义：表示待匹配串的结束位置；
字符\d{5,9}意义：\d是数字，{5,9}是5-9位，如果只是验证手机号，且校验的正则表达式如下：
/^1[3|5|8][0-9]\d{4,8}$/ ；
不妨写成 /^1[3|5|8]\d{9}$/ ；
2.对手机号字符串的校验
String mobileRegex = "^1(3|4|5|7|8)\\d{9}$";
if ((mobileRegex)){
*******;
}else {
*******;
}
注：
/**
* Tells whether or not this string matches the given <a
* href="../util/regex/#sum">regular expression</a>.
*
* <p> An invocation of this method of the form
* <i>str</i><tt>.matches(</tt><i>regex</i><tt>)</tt> yields exactly the
* same result as the expression
*
* <blockquote><tt> {@link }.{@link
* #matches(String,CharSequence)
* matches}(</tt><i>regex</i><tt>,</tt> <i>str</i><tt>)</tt></blockquote>
*
* @param regex
* the regular expression to which this string is to be matched
*
* @return <tt>true</tt> if, and only if, this string matches the
* given regular expression
*
* @throws PatternSyntaxException
* if the regular expression's syntax is invalid
*
* @see
*
* @since 1.4
* @spec JSR-51
*/
public boolean matches(String regex) {
return (regex, this);
}
/**
* Compiles the given regular expression and attempts to match the given
* input against it.
*
* <p> An invocation of this convenience method of the form
*
* <blockquote><pre>
* (regex, input);</pre></blockquote>
*
* behaves in exactly the same way as the expression
*
* <blockquote><pre>
* (regex).matcher(input).matches()</pre></blockquote>
*
* <p> If a pattern is to be used multiple times, compiling it once and reusing
* it will be more efficient than invoking this method each time. </p>
*
* @param regex
* The expression to be compiled
*
* @param input
* The character sequence to be matched
*
* @throws PatternSyntaxException
* If the expression's syntax is invalid
*/
public static boolean matches(String regex, CharSequence input) {
Pattern p = (regex);
Matcher m = (input);
return ();
}