java正则表达式 .* 和 .*？的区别

.*为贪婪模式，.*?为非贪婪模式。例如

 1: String regex1="a(.*)b"; 

 2: String regex2="a(.*?)b"; 

 3: 

 4: Pattern info = Pattern.compile(regex1); 

 5: Matcher matcher = info.matcher("acbcbc"); 

 6: 

 7: matcher.group(1);//得到cbc 

 8: 

 9: Pattern info = Pattern.compile(regex2); 

 10: Matcher matcher = info.matcher("acbcbc"); 

 11: 

 12: matcher.group(1);//得到c 

 13: