【java】java.util.regex.Pattern和java.util.regex.Matcher简单示例

 package 正则;

 import java.util.regex.Matcher;
 import java.util.regex.Pattern;

 public class Test_regex {
     public static void main(String[] args) {
         String str="a1b22c333d4444e_55_555f666666g7777777";
         String regex="\\w*";
         Pattern pattern=Pattern.compile(regex);
         Matcher matcher=pattern.matcher(str);
         System.out.println(matcher.matches());//true
     }
 }

Matcher

 package 正则;

 import java.util.regex.Pattern;

 public class Test_regex {
     public static void main(String[] args) {
         String str="a1b22c333d4444e55555f666666g7777777";
         String regex="\\d+";
         Pattern pattern=Pattern.compile(regex);
         for(String s:pattern.split(str))
             System.out.print(s+" ");//a b c d e f g
     }
 }

Pattern