Struts2拦截器的应用

拦截器类

packagecom.umgsai.txyl.interceptor;
importcom.opensymphony.xwork2.ActionContext;
importcom.opensymphony.xwork2.ActionInvocation;
importcom.opensymphony.xwork2.interceptor.AbstractInterceptor;
publicclassAdminInterceptorextendsAbstractInterceptor{
privatestaticfinallongserialVersionUID=1L;
//管理员操作相关的拦截器
@Override
publicStringintercept(ActionInvocationinvocation)throwsException{
Stringresult=null;
ActionContextactionContext=invocation.getInvocationContext();
if((actionContext.getSession().get("admin")==null||"".equals(actionContext.getSession().get("admin")))){
return"admin_login";
}
result=invocation.invoke();
returnresult;
}
publicstaticvoidmain(String[]args){
//TODOAuto-generatedmethodstub
}
}

admin.xml中应用

<?xmlversion="1.0"encoding="UTF-8"?>
<!DOCTYPEstrutsPUBLIC"-//ApacheSoftwareFoundation//DTDStrutsConfiguration2.0//EN""http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>

<packagename="admin"extends="struts-default">
<interceptors>
 <interceptorname="AdminInterceptor"class="com.umgsai.txyl.interceptor.AdminInterceptor"/>
<!--定义拦截器栈-->
<interceptor-stackname="myStack"><!--引用自定义拦截器进行身份验证-->
<interceptor-refname="defaultStack"/>
<interceptor-refname="AdminInterceptor"/>
</interceptor-stack>
</interceptors>
 <default-interceptor-refname="myStack"/><!--拦截器引用-->
<global-results><!--全局结果转发-->
<resultname="admin_login">/admin/login.jsp</result><!--管理员身份验证失败-->
</global-results>
<actionname="image_upload"class="com.umgsai.txyl.action.UploadAction"method="site_modify">
<paramname="allowTypes">image/bmp,image/png,image/gif,image/jpeg,image/pjpeg</param>
<paramname="savePath">/images</param>
<resultname="error">site_modify.jsp?site_id=${site_id}</result>
<resultname="success">site_modify.jsp?site_id=${site_id}</result>
 </action>
<actionname="admin_login"class="com.umgsai.txyl.action.AdminAction"
method="execute">
<interceptor-refname="defaultStack"/>
<resultname="admin_login_success">index.jsp</result><!--//用户登录-->
<resultname="admin_login_failed">login.jsp</result>
</action>
 </package>
</struts>