Struts2 错误:There is no Action mapped for namespace… 解决方法

今天在使用 Struts 2.1 做注解操作的时候,一直出现这个问题。花了半天时间才解决,错误原因真是让人蛋疼!

错误提示

struts2-error-there-is-no-action-mapped-for-namespace-solution-1

项目结构

struts2-error-there-is-no-action-mapped-for-namespace-solution-2

使用注解的位置

package com.service;

import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Namespace;
import org.apache.struts2.convention.annotation.ParentPackage;
import org.apache.struts2.convention.annotation.Result;
import org.hibernate.event.SaveOrUpdateEvent;
import com.biz.GoodsBIZ;
import com.dao.GoodsDAO;
import com.domain.Goods;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

/**
 * GoodsAction.java
 *
 * @author Techzero
 * @Email techzero@163.com
 * @Time 2015年1月5日 上午9:05:11
 */
@ParentPackage("struts-default")
@Namespace("/goods")
public class GoodsAction extends ActionSupport {
	private Goods goods;
	public Goods getGoods() {
		return goods;
	}
	public void setGoods(Goods goods) {
		this.goods = goods;
	}

	@Action(value="findall", results={
			@Result(location="/admin/goods/show.jsp")
	})
	public String findAll() throws Exception {
		GoodsBIZ goodsBIZ = new GoodsBIZ();
		GoodsDAO goodsDAO = new GoodsDAO();
		goodsBIZ.setGoodsDAO(goodsDAO);
		List goodsList = goodsBIZ.findAll();
		Map requestMap = (Map) ActionContext.getContext().get("request");
		requestMap.put("goodsList", goodsList);
		return ActionSupport.SUCCESS;
	}
}

解决方法

看上去没有任何问题,可是只要一运行就报错!百度了半天没找到,最后发现我这个包名跟别人的不一样,问题就出在这里!将 service 换成 action 就可以了,以下是 Struts2 的原文文档:

First the Convention plugin finds packages named struts, struts2, action or actions. Any packages that match those names are considered the root packages for the Convention plugin. Next, the plugin looks at all of the classes in those packages as well as sub-packages and determines if the classes implementcom.opensymphony.xwork2.Action or if their name ends with Action (i.e. FooAction).

大概意思是,如果要用 Struts2 的注解,必须要将 action 处理类放在 struts, struts2, action, actions 包或者其子包中。这个设定真心有点坑。。。

暂无评论

发表评论

电子邮件地址不会被公开。 必填项已用*标注

验证码已失效,请刷新验证码