我把自己以往的文章汇总成为了Github，欢迎各位大佬starhttps://github.com/crisxuan/bestJavaer我们之前了解过了AtomicInteger、AtomicLong、AtomicBoolean等原子性工具类，下面我们继续了解一下位于java.util.concurrent.atomic包下的工具类。关于AtomicInteger、Ato

selectbankCard=(selectb.BankCardNumber+','fromC_BankCardasbwhereb.UserId=r.UserIdFORXMLPATH('')),*from[C_User_Register]rwherer.UserId='101457'selectCONCAT(b.BankCardNumber,',',b.BankName)fromC_Ban

 格式化手机号码为335Stringmobile="13123456789";Stringregex="(\\d{3})(\\d{3})(\\d{5})";StringformatedMobile=mobile.replaceAll(regex,"$1$2$3")

运算符运算符分为7种分别是算数运算符:+-*/%逻辑运算符:andorlikebetweeninexistsnotallany赋值运算符:=字符串运算符:+比较运算符:=><<=>