publicstaticvoidmain(String[]args){

//要验证的字符串

Stringstr="service@xsoftlab.net";

//邮箱验证规则

StringregEx="[a-zA-Z_]{1,}[0-9]{0,}@(([a-zA-z0-9]-*){1,}\.){1,3}[a-zA-z\-]{1,}";

//编译正则表达式

Patternpattern=Pattern.compile(regEx);

//忽略大小写的写法

//Patternpat=Pattern.compile(regEx,Pattern.CASE_INSENSITIVE);

Matchermatcher=pattern.matcher(str);

//字符串是否与正则表达式相匹配

booleanrs=matcher.matches();

System.out.println(rs);

}