java正则使用基础

java正则使用基础：

?

?

package nie.test.regexp;import java.util.regex.Matcher;import java.util.regex.Pattern;public class RegExpTest {public static void main(String[] args) {//目标内容String targetString = "abcd33cat34eg&8dlkjk$#__fkjk&*&*";//1.声明模式字串;String ps = "[0-9]{2}cat[0-9]";//2.编译模式;Pattern ptn = Pattern.compile(ps);//3.匹配模式;Matcher mch = ptn.matcher(targetString);//4.搜索;System.out.println(mch.find());//5.全匹配System.out.println(mch.matches());}}