请问string类型的方法可以在sql时使用,在mysql中怎样实现string的功能.因为mysql只有varchar类型想通过mysql实现string的所有功能.请高手指点
.<%
String userid = request.getParameter("userid");
if ( userid == null ) {
userid = "";
}
String email = request.getParameter("email");
if ( email == null ) {
email = "";
}
String name = request.getParameter("name");
if ( name == null ) {
name = "";
}
String phone = request.getParameter("phone");
if ( phone == null ) {
phone = "";
}
String city = request.getParameter("city");
if ( city == null ) {
city = "";
}
String state = request.getParameter("state");
if ( state == null ) {
state = "";
}
String zipCode = request.getParameter("zipCode");
if ( zipCode == null ) {
zipCode = "";
} String errorMessage = request.getParameter("errorMessage");
%>
.<%
String userid = request.getParameter("userid");
if ( userid == null ) {
userid = "";
}
String email = request.getParameter("email");
if ( email == null ) {
email = "";
}
String name = request.getParameter("name");
if ( name == null ) {
name = "";
}
String phone = request.getParameter("phone");
if ( phone == null ) {
phone = "";
}
String city = request.getParameter("city");
if ( city == null ) {
city = "";
}
String state = request.getParameter("state");
if ( state == null ) {
state = "";
}
String zipCode = request.getParameter("zipCode");
if ( zipCode == null ) {
zipCode = "";
} String errorMessage = request.getParameter("errorMessage");
%>
String userid = null ;
吧