<span style="font-size:14px;">package cn.itcast.test; import java.util.regex.Matcher; import java.util.regex.Pattern; //Greedy Reluctant Possessive区别 public class Demo3 { public static void main(String[] args) { /* //Greedy (.{3,10})[0-9] -->一般使用这个 //先把s吞取10个字符再说,与模式串进行匹配,匹配失败,把最后一个吐出来,吐出来的正好是数字,正好匹配,所以输出0-10 Pattern p = Pattern.compile("(.{3,10})[0-9]"); String s = "aaaa3bbbb6"; Matcher m = p.matcher(s); if(m.find()){ p(m.start()+ "-" + m.end()); }else{ p("not match"); }*/ /*//Reluctant (.{3,10}?)[0-9] //这个与Greedy正好相反 吞最少的 正好结果为0-5 Pattern p = Pattern.compile("(.{3,10}?)[0-9]"); String s = "aaaa3bbbb6"; Matcher m = p.matcher(s); if(m.find()){ p(m.start()+ "-" + m.end()); }else{ p("not match"); }*/ // Possessive 与Greedy 不同的是,它不吐字符,这个匹配不上 Pattern p = Pattern.compile("(.{3,10}+)[0-9]"); String s = "aaaa3bbbb6"; Matcher m = p.matcher(s); if(m.find()){ p(m.start()+ "-" + m.end()); }else{ p("not match"); } } private static void p(Object o) { System.out.println(o); } } </span>