标签:default oca uri font miss chm action exce custom
下面说明了栈的调用次序:
1 <package name="default" extends="struts-default"> 2 <!--配置拦截器--> 3 <interceptors> 4 <interceptor name="FirstInterceptor" class="Interceptor.FirstInterceptor"> 5 <param name="value" >YEN</param> 6 </interceptor> 7 <interceptor name="SecondInterceptor" class="Interceptor.SecondInterceptor"></interceptor> 8 //次序为 FirstInterceptor==》SecondInterceptor===》defaultStack===》SecondInterceptor====》FirstInterceptor
9 <interceptor-stack name="AllInterceptor"> 10 <interceptor-ref name="FirstInterceptor"></interceptor-ref> 11 <interceptor-ref name="SecondInterceptor"></interceptor-ref> 12 <interceptor-ref name="defaultStack"></interceptor-ref> 13 </interceptor-stack> 14 </interceptors> 15 16 <action name="LoginAction" class="Action.LoginAction"> 17 <interceptor-ref name="AllInterceptor"></interceptor-ref> 18 <result name="success">success.jsp</result> 19 </action>
struts2自带的拦截器:
struts2提供的 interceptor-stack 不是让我们偷懒的,很多时候,我定义自己很多的拦截器,每一个拦截器在不同业务场景下是不同的,我们不能为了图方便,把所以拦截器全部配置为一个拦截器栈来使用,这回极大的加强服务器的负担,
比如说:methodFirstceptor 是一个方法拦截器,我们配置需要拦截的方法,而function 拦截器又不需要拦截相关的方法,所以就没有必要把他们放在一起。
<!-- 拦截器栈配置属于自己的拦截器规则 --> <interceptor-stack name="mystack"> <interceptor-ref name="methodFirstceptor"></interceptor-ref> <interceptor-ref name="funtion"></interceptor-ref> <interceptor-ref name="defaultStack"> <param name="fileUpload.maximumSize">2097152</param> <!-- <param name="fileUpload.allowedTypes">text/html,text/xml</param> --> <param name="fileUpload.allowedExtensions">html,dtd,xml</param> </interceptor-ref> <interceptor-ref name="defaultStack"></interceptor-ref> </interceptor-stack>
注意:默认拦截器 也叫全局拦截器 (也就是说我们 一定要注意在配置 默认拦截器的时候 不要加过多无用的拦截器,只要那些都需要作用到每个Action上的拦截器,才能配置拦截器栈 以及默认拦截器)
1 <!-- 为此包下的所有action应用拦截器 --> 2 <default-interceptor-ref name="permissionStack" />
普通拦截器:
1 //可以实现Interceptor 2 public class MyInterceptor extends AbstractInterceptor { 3 4 /** 5 * 6 */ 7 private static final long serialVersionUID = 1L; 8 @Override 9 public String intercept(ActionInvocation invocation) throws Exception { 10 11 System.out.println("before invocation.invoke..."); 12 13 //可以不调用 14 String result = invocation.invoke(); 15 16 System.out.println("after invocation.invoke..."); 17 18 return "success"; 19 } 20 }
方法拦截器:
1 public class MethodFirstceptor extends MethodFilterInterceptor { 2 /** 3 * 4 */ 5 private static final long serialVersionUID = 1L; 6 7 @Override 8 protected String doIntercept(ActionInvocation aInvocation) throws Exception { 9 System.out.println("进入方法拦截器"); 10 String str = aInvocation.invoke(); 11 System.out.println("退出方法拦截器"); 12 return str; 13 } 14 15 @Override 16 public Set<String> getExcludeMethodsSet() { 17 // TODO Auto-generated method stub 18 return super.getExcludeMethodsSet(); 19 } 20 21 @Override 22 public Set<String> getIncludeMethodsSet() { 23 // TODO Auto-generated method stub 24 return super.getIncludeMethodsSet(); 25 } 26 }
struts2配置文件:
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE struts PUBLIC 3 "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" 4 "http://struts.apache.org/dtds/struts-2.3.dtd"> 5 6 <struts> 7 8 9 <!-- 配置国际化资源文件 --> 10 <constant name="struts.custom.i18n.resources" value="i18n"></constant> 11 <constant name="struts.devMode" value="true"></constant> 12 13 <package name="default" namespace="/" extends="struts-default"> 14 15 <interceptors> 16 <!--方法拦截器配置 --> 17 <interceptor name="methodFirstceptor" 18 class="interceptors.MethodFirstceptor"> 19 <!--配置参数 :拦截什么方法 --> 20 <!--includeMethods控制能访问哪些 --> 21 <param name="includeMethods">add</param> 22 <!--excludeMethods控制能访问哪些 --> 23 </interceptor> 24 25 <!-- 自定义拦截器 --> 26 <interceptor name="hello" 27 class="interceptors.MyInterceptor"></interceptor> 28 29 <!-- 拦截器栈配置属于自己的拦截器规则 --> 30 <interceptor-stack name="mystack"> 31 <interceptor-ref name="methodFirstceptor"></interceptor-ref> 32 <interceptor-ref name="hello"></interceptor-ref> 33 <interceptor-ref name="defaultStack"> 34 <param name="fileUpload.maximumSize">2097152</param> 35 <!-- <param name="fileUpload.allowedTypes">text/html,text/xml</param> --> 36 <param name="fileUpload.allowedExtensions">html,dtd,xml</param> 37 </interceptor-ref> 38 <interceptor-ref name="defaultStack"></interceptor-ref> 39 </interceptor-stack> 40 41 </interceptors> 42 43 <default-interceptor-ref name="mystack"></default-interceptor-ref> 44 45 <!-- 执行默认的方法的时候 是不会被拦截的 --> 46 <action name="loginAction" class="action.LoginAction"> 47 <interceptor-ref name="mystack"></interceptor-ref> 48 <result>/success.jsp</result> 49 </action> 50 51 <!-- 执行要拦截的方法 --> 52 <action name="addAction" class="action.LoginAction" method="add"> 53 <interceptor-ref name="mystack"></interceptor-ref> 54 <result>/success.jsp</result> 55 </action> 56 57 58 59 60 <action name="testUpload" class="upload.UploadAction"> 61 <result>/success.jsp</result> 62 <result name="input">/upload.jsp</result> 63 </action> 64 65 <action name="testUpload2" class="upload.MulUploadAction"> 66 <result>/success.jsp</result> 67 <result name="input">/uploadmul.jsp</result> 68 </action> 69 70 <action name="testDownload" class="download.DownLoadAction"> 71 <result type="stream"> 72 <param name="bufferSize">2048</param> 73 <!-- <param name="contentType">${contentType}</param> --> 74 <!-- 调用当前action中的getContentType()方法 --> 75 <param name="contentDisposition">attachment;filename=${filename}</param> 76 <param name="inputStream">${inputStream}</param> 77 <!-- 调用当前action中的getInputStream()方法 --> 78 </result> 79 </action> 80 81 <!-- 表单重复提交问题 --> 82 83 <action name="testToken" class="token.TokenAction"> 84 <interceptor-ref name="mystack"></interceptor-ref> 85 <!-- 会转到标记为invalid-token的页面 --> 86 <!-- <interceptor-ref name="token"></interceptor-ref> --> 87 <!-- 停留在当前页面,不做任何操作 --> 88 <interceptor-ref name="tokenSession"></interceptor-ref> 89 <!-- 必须调用默认的拦截器 --> 90 <interceptor-ref name="defaultStack"></interceptor-ref> 91 <result>/success.jsp</result> 92 <result name="invalid.token">/token-error.jsp</result> 93 </action> 94 95 </package> 96 97 98 </struts>
<package name="default" extends="struts-default"><!--配置拦截器--><interceptors><interceptor name="FirstInterceptor" class="Interceptor.FirstInterceptor"><param name="value" >YEN</param></interceptor><interceptor name="SecondInterceptor" class="Interceptor.SecondInterceptor"></interceptor><interceptor-stack name="AllInterceptor"><interceptor-ref name="FirstInterceptor"></interceptor-ref><interceptor-ref name="SecondInterceptor"></interceptor-ref><interceptor-ref name="defaultStack"></interceptor-ref></interceptor-stack></interceptors><action name="LoginAction" class="Action.LoginAction"><interceptor-ref name="AllInterceptor"></interceptor-ref><result name="success">success.jsp</result></action>
标签:default oca uri font miss chm action exce custom
原文地址:https://www.cnblogs.com/dgwblog/p/9658031.html