第一种匹配方式
import java.util.regex.*;

public class RegexExample1{
      public static void main(String args[]){
            String content = "需要校验的内容";
            String pattern = "正则表达式";
            boolean isMatch = Pattern.matches(pattern, content);
            System.out.println(isMatch);
      }
}

第二种匹配方式
import java.util.regex.*;

public class RegexExample1{
      public static void main(String args[]){
            String content = "需要校验的内容";
            String pattern = "正则表达式";
            Pattern p = Pattern.compile(pattern );
            Matcher m = p.matcher(content);
            System.out.println(m.matches());
      }
}