正则表达式替换json字符串的某一项的数字值

aa=aa.replaceAll("\"ccfsID\":\"[0-9]*\"", "\"ccfsID\":\""+id1+"\"");

aa为json字符串，如：

{"items":[{"dishprice":30,"ccfsID":"","order.item.id":1,"zuofaid":"","zuofajiajia":0,"isTaoCan":false,"num":1,"price":30,"name":"","ID":"00000001","lsdishID":"","zuofaname":"","tzs":"","addTime":"2013-05-14"}],"deskId":"00000008"}