struts2异常处理

 

  通过Servlet异常处理,只要简单地在Web.xml里配置异常处理类型和返回页面

  通过Struts的异常处理机制,在struts.xml配置局部异常和全局异常

  通过编写一个Action 异常基类,子类继承而获得异常处理功能

 

 

 

1) Servlet异常处理xml 代码   在web.xml中配置

<error-page>   
   <error-code>404<error-code>   
   <location>XXX.jsp<location>    
<error-page>   
   
<error-page>   
    <exception-type>java.lang.NullPointerException<exception-type>   
    <location>XXX.jsp<location>    
<error-page>

 

 Struts的异常处理机制,在struts.xml配置局部异常和全局异常

<!-- 全局异常映射 --> 
<global-exception-mappings> 
	<exception-mapping result="error" exception="java.lang.Exception">    
	</exception-mapping> 
</global-exception-mappings> 

<!-- 局部异常映射 --> 
<action name="airTicketAction" class="AirTicketAction"> 
	<result name="order">airticket/airticketorder.jsp</result> 
	<exception-mapping result="nullPoint" exception="java.lang.NullPointerException">
	</exception-mapping>   
	<result name="nullPoint">error.jsp</result>   
</action>

 

3)编写一个Action 异常基类,子类继承而获得异常处理功能

 

public abstract class ErrorBaseAction extends Action{       
                 
       public final ActionForward execute(ActionMapping mapping,       
                                    ActionForm form,        
                                    HttpServletRequest request,        
                                    HttpServletResponse response)       
                                    throws IOException, ServletException {        
              try{    
                     return doExecute(mapping,form,request,response);    
              }catch(Exception ex){    
                     return doException(ex,mapping,form,request,response);    
              }    
    }       
      
      public  ActionForward doException(Exception ex,    
                                    ActionMapping mapping,       
                                    ActionForm form,        
                                    HttpServletRequest request,        
                                    HttpServletResponse response)       
                                    throws IOException, ServletException {        
                 // 异常处理    
                  return mapping.findForward("XXX");//返回页面    
      }    
   
       public abstract  ActionForward doExecute(ActionMapping mapping,       
                                    ActionForm form,        
                                    HttpServletRequest request,        
                                    HttpServletResponse response)       
                                    throws IOException, ServletException;    
      
}     

 

评论

1 楼 holdbelief 2011-02-09  

哥哥，你这个到底是Struts几？