@Action("foreregister")
    public String register() {
        user.setName(HtmlUtils.htmlEscape(user.getName()));
        boolean exist = userService.isExist(user.getName());
       
         if(exist){
             msg = "用户名已经被使用,不能使用";
             return "register.jsp";  
         }
         userService.save(user);
         return "registerSuccessPage";
    }

package com.how2java.tmall.action;
 
import org.apache.struts2.convention.annotation.Action;
import org.springframework.web.util.HtmlUtils;
 
public class ForeAction extends Action4Result {
    String msg;
    @Action("foreregister")
    public String register() {
        user.setName(HtmlUtils.htmlEscape(user.getName()));
        boolean exist = userService.isExist(user.getName());
       
         if(exist){
             msg = "用户名已经被使用,不能使用";
             return "register.jsp";  
         }
         userService.save(user);
         return "registerSuccessPage";
    }   
    @Action("forehome")
    public String home() {
        categorys = categoryService.list();
        productService.fill(categorys);
        productService.fillByRow(categorys);
        return "home.jsp";
    }
    public String getMsg() {
        return msg;
    }
    public void setMsg(String msg) {
        this.msg = msg;
    }
     
}

package com.how2java.tmall.action;

public class Action4Parameter extends Action4Service {
	//错误消息
	protected String msg;

	public String getMsg() {
		return msg;
	}

	public void setMsg(String msg) {
		this.msg = msg;
	}
		
}

package com.how2java.tmall.action;

import org.apache.struts2.convention.annotation.Namespace;
import org.apache.struts2.convention.annotation.ParentPackage;
import org.apache.struts2.convention.annotation.Result;
import org.apache.struts2.convention.annotation.Results;

@Namespace("/")
@ParentPackage("basicstruts")  
@Results(
		{
			/*全局的*/
			@Result(name="success.jsp", location="/success.jsp"),
			@Result(name="fail.jsp", location="/fail.jsp"),
			
			/*分类管理*/
			@Result(name="listCategory", location="/admin/listCategory.jsp"),
			@Result(name="editCategory", location="/admin/editCategory.jsp"),
			@Result(name="listCategoryPage", type = "redirect", location="/admin_category_list"),
		
			/*属性管理*/
			@Result(name="listProperty", location="/admin/listProperty.jsp"),
			@Result(name="editProperty", location="/admin/editProperty.jsp"),
			@Result(name="listPropertyPage", type = "redirect", location="/admin_property_list?category.id=${property.category.id}"),
			
			/*产品管理*/
			@Result(name="listProduct", location="/admin/listProduct.jsp"),
			@Result(name="editProduct", location="/admin/editProduct.jsp"),
			@Result(name="listProductPage", type = "redirect", location="/admin_product_list?category.id=${product.category.id}"),

			/*产品图片管理*/
			@Result(name="listProductImage", location="/admin/listProductImage.jsp"),
			@Result(name="listProductImagePage", type = "redirect", location="/admin_productImage_list?product.id=${productImage.product.id}"),
			
			/*属性值管理*/
			@Result(name="editPropertyValue", location="/admin/editProductValue.jsp"),
			
			/*用户管理*/
			@Result(name="listUser", location="/admin/listUser.jsp"),

			/*订单管理*/
			@Result(name="listOrder", location="/admin/listOrder.jsp"),
			@Result(name="listOrderPage", type = "redirect", location="/admin_order_list"),
			
			/*前台 服务端跳转*/
			@Result(name="home.jsp", location="/home.jsp"),
			@Result(name="register.jsp", location="/register.jsp"),
			@Result(name="login.jsp", location="/login.jsp"),
			@Result(name="product.jsp", location="/product.jsp"),
			@Result(name="category.jsp", location="/category.jsp"),
			@Result(name="searchResult.jsp", location="/searchResult.jsp"),
			@Result(name="buy.jsp", location="/buy.jsp"),
			@Result(name="cart.jsp", location="/cart.jsp"),
			@Result(name="alipay.jsp", location="/alipay.jsp"),
			@Result(name="payed.jsp", location="/payed.jsp"),
			@Result(name="bought.jsp", location="/bought.jsp"),
			@Result(name="confirmPay.jsp", location="/confirmPay.jsp"),
			@Result(name="orderConfirmed.jsp", location="/orderConfirmed.jsp"),
			@Result(name="review.jsp", location="/review.jsp"),
			
			/*前台 客户端跳转*/
			@Result(name="registerSuccessPage", type = "redirect", location="/registerSuccess.jsp"),
			@Result(name="homePage", type = "redirect", location="forehome"),
			@Result(name="buyPage", type = "redirect", location="forebuy?oiids=${oiid}"),
			@Result(name="alipayPage", type = "redirect", location="forealipay?order.id=${order.id}&total=${total}"),
			@Result(name="reviewPage", type = "redirect", location="forereview?order.id=${order.id}&showonly=${showonly}"),
		})

public class Action4Result extends Action4Parameter  {

}

package com.how2java.tmall.action;

import org.apache.struts2.ServletActionContext;

public class Action4Parameter extends Action4Service {
	//错误消息
	protected String msg;
	
	//分类页面的排序变量
	protected String sort;
	//当前所处于的web应用名称，如果按照教程来，就是tmall_ssh
	protected String contextPath;
	
	//搜索关键字
	protected String keyword;
	
	//购物数量
	protected int num;
	
	//立即购买生成的订单项id
	protected int oiid;
	
	//通过购物车选中的多个订单项id
	protected int[] oiids;
	
	//结算页面显示的总金额
	protected float total;
	
	//在进行评论的页面，是否只显示评论记录，而不提供输入
	protected boolean showonly;
	
	public Action4Parameter(){
		contextPath = ServletActionContext.getServletContext().getContextPath();
	}
	
	public String getMsg() {
		return msg;
	}

	public void setMsg(String msg) {
		this.msg = msg;
	}

	public String getSort() {
		return sort;
	}

	public void setSort(String sort) {
		this.sort = sort;
	}

	public String getContextPath() {
		return contextPath;
	}

	public void setContextPath(String contextPath) {
		this.contextPath = contextPath;
	}

	public String getKeyword() {
		return keyword;
	}

	public void setKeyword(String keyword) {
		this.keyword = keyword;
	}

	public int getNum() {
		return num;
	}

	public void setNum(int num) {
		this.num = num;
	}

	public int getOiid() {
		return oiid;
	}

	public void setOiid(int oiid) {
		this.oiid = oiid;
	}

	public int[] getOiids() {
		return oiids;
	}

	public void setOiids(int[] oiids) {
		this.oiids = oiids;
	}

	public float getTotal() {
		return total;
	}

	public void setTotal(float total) {
		this.total = total;
	}

	public boolean isShowonly() {
		return showonly;
	}

	public void setShowonly(boolean showonly) {
		this.showonly = showonly;
	}

}