JSP验证码（随机生产1-9数字和小写字母）

/* * Generated by MyEclipse Struts * Template path: templates/java/JavaClass.vtl */ package com.yourcompany.struts.action; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.apache.struts.action.Action; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import org.apache.struts.action.ActionMessage; import org.apache.struts.action.ActionMessages; import com.yourcompany.struts.form.RegForm; public class RegAction extends Action { public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { RegForm regForm = (RegForm) form;// TODO Auto-generated method stub HttpSession session=request.getSession(); System.out.println(session.getAttribute("rand")); System.out.println(regForm.getName()); ActionMessages errors = new ActionMessages(); ActionMessage error = new ActionMessage("error.textfield2"); errors.add("error",error); this.saveErrors(request, errors); return new ActionForward("/reg.jsp"); } }