转--struts2自定义拦截器导致无法传参

素颜马尾好姑娘i 2022-07-16 03:11 125阅读 0赞

写在前面：action里面的参数一般只需要有setter就可以了，但若参数需要传递到struts.xml里面，比如<result type="redirectAction">$\{prePage\}</result>，则这个prePage必须要加上getter，否则传递不了。因此，好的习惯是都加上getter。

今天做项目时，使用拦截器对用户权限检查。拦截器本身没有问题，可是实现权限拦截，但是传递的参数全部都无效了。搞了很久，由于对拦截器的内部机制不是特别熟悉，所以重新研读了一下Struts2的拦截器。找到了原因：给一个Acton配置一个自定义拦截器后，此action就无法使用框架默认的拦截器栈了，这就导致前后台数据传输无效。  
解决方法一般有两种：

一、显示的使用默认拦截器

<table style="margin:0px; padding:0px; border-collapse:collapse; border-spacing:0px; border:1px solid silver; word-break:break-word"> 
 <tbody style="margin:0px; padding:0px"> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 1</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &lt;action name="enterSystem_*" class="enterSystemManager" method="{1}"&gt;</td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 2</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &lt;!-- 使用拦截器：进行权限检查 --&gt;</td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 3</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &lt;interceptor-ref name="defaultStack" /&gt;</td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 4</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &lt;interceptor-ref name="autority" /&gt;</td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 5</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &lt;result name="workerMangerUI"&gt;/WEB-INF/page/backstage/system/workerManager.jsp&lt;/result&gt;</td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 6</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &lt;result name="positionMangerUI"&gt;/WEB-INF/page/backstage/system/positionManager.jsp&lt;/result&gt;</td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 7</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &lt;/action&gt;</td> 
 </tr> 
 </tbody> 
</table>

二、使用<interceptor-ref name="params" />让参数先传递

<table style="margin:0px; padding:0px; border-collapse:collapse; border-spacing:0px; border:1px solid silver; word-break:break-word"> 
 <tbody style="margin:0px; padding:0px"> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 1</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &lt;action name="enterSystem_*" class="enterSystemManager" method="{1}"&gt;</td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 2</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &lt;!-- 使用拦截器：进行权限检查 --&gt;</td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 3</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &lt;interceptor-ref name="params" /&gt;</td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 4</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &lt;interceptor-ref name="autority" /&gt;</td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 5</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &lt;result name="workerMangerUI"&gt;/WEB-INF/page/backstage/system/workerManager.jsp&lt;/result&gt;</td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 6</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &lt;result name="positionMangerUI"&gt;/WEB-INF/page/backstage/system/positionManager.jsp&lt;/result&gt;</td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 7</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &lt;/action&gt;</td> 
 </tr> 
 </tbody> 
</table>