这个问题研究了一天，还是因为配置的时候没有认真，一不小心，酿成了大错。当发现的时候感觉好尴尬啊::>_<::

CostAction:

package com.tenni.action;import java.util.List;import javax.annotation.Resource;import org.springframework.context.annotation.Scope;import org.springframework.stereotype.Controller;import com.tenni.dao.ICostDao;import com.tenni.entity.Cost;@Controller@Scope("prototype")public class CostAction {        @Resource    private ICostDao costDao;    //input    private int page = 1;    private int pageSize;    //output    private String msg;    private List
     
       list;    private int totalPage;        public String findAll(){        list = costDao.findAll();        return "success";    }    //分页查询    public String load(){        list = costDao.findByPage(page, pageSize);        totalPage = costDao.findTotalPage(pageSize);        return "success";    }        /**     * @return the msg     */    public String getMsg() {        return msg;    }    /**     * @param msg the msg to set     */    public void setMsg(String msg) {        this.msg = msg;    }    /**     * @return the list     */    public List
      
        getList() {        return list;    }    /**     * @param list the list to set     */    public void setList(List
       
         list) {        this.list = list;    }    public ICostDao getCostDao() {        return costDao;    }    public void setCostDao(ICostDao costDao) {        this.costDao = costDao;    }    public int getPage() {        return page;    }    public void setPage(int page) {        this.page = page;    }    public int getPageSize() {        return pageSize;    }    public void setPageSize(int pageSize) {        this.pageSize = pageSize;    }    public int getTotalPage() {        return totalPage;    }    public void setTotalPage(int totalPage) {        this.totalPage = totalPage;    }}
       
      
     

Struts.xml

         
             
                  
                   
                   
                   
                   
                   
                       
                        
                        
                        
                    
               
              
              
              
              
                  
                   
                       
        /login                
        toLogin            
                   
                       
        /error                
        error            
               
          
         
         
             
                  
       
                        /WEB-INF/main/cost.jsp            
               
              
                  
                   
       3            
       
                        /WEB-INF/main/find_cost.jsp            
               
          
     

 

 

package----->cost extends---->interceptor(继承了json)

由于使用Spring来管理Action，因此需要通过Spring容器来创建Action，因此class属性指定的是组件的ID。

所以：

    
      costAction 不能写成com.tenni.action.CostAction