正则表达式的问题

[kingapex1]

String regEx = "listCategoryInfo.do?categoryId=.*";
Pattern p = Pattern.compile(regEx);
Matcher m = p.matcher("listCategoryInfo.do?categoryId=5");

System.out.println(m.find() ); 为什么输出是false?

[zqrqq]

String regEx = "listCategoryInfo.do\\?categoryId=.*";

“？”需要转义

[kingapex1]

String regEx = "listCategoryInfo.do\\?categoryId=.*";
Pattern p = Pattern.compile(regEx);
Matcher m = p.matcher("listCategoryInfo.do\\?categoryId=5");

依然是false

[zqrqq]

Matcher m = p.matcher("listCategoryInfo.do?categoryId=5");
这里不需要转义，这里是普通字符串

String regEx = "listCategoryInfo.do\\?categoryId=.*";
Pattern p = Pattern.compile(regEx);这里是正则表达式，需要转义

[shan1119]

一个是匹配表达式,一个是匹配字符串.