struts2自定义拦截器（创建拦截器，拦截器配置）

逃离我推掉我的手 2022-04-23 04:28 370阅读 0赞

1.拦截器创建：![20190123184451787.png][]

2.拦截器API：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTY2Nzcy_size_16_color_FFFFFF_t_70][]

校验失败不放行，直接return字符串，如：success ，跳转页面返回信息

3.拦截器配置：struts.xml

![20190123185644811.png][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTY2Nzcy_size_16_color_FFFFFF_t_70 1][]

![20190123190349675.png][]

### web.xml,添加过滤器 ###

<filter>
      	<filter-name>struts2</filter-name>
      	<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
      </filter>
      <filter-mapping>
      	<filter-name>struts2</filter-name>
      	<url-pattern>/*</url-pattern>
      </filter-mapping>

### MyInterceptor过滤器： ###

public class MyInterceptor extends MethodFilterInterceptor{
    
    	@Override
    	protected String doIntercept(ActionInvocation invocation) throws Exception {
    		//前处理
    		System.out.println("before处理");
    		//放行
    		String result = invocation.invoke();
    		//后处理
    		System.out.println("after处理");
    		
    		return result;
    	}
    
    }

### Action：InterceptorAction ###

public class InterceptorAction extends ActionSupport{
    
    	
    	public String print() throws Exception {
    		System.out.println("Action.....print");
    		return SUCCESS;
    	}
    	
    	public String list() throws Exception {
    		System.out.println("Action.....list");
    		return SUCCESS;
    	}
    	
    	public String add() throws Exception {
    		System.out.println("Action.....add");
    		return SUCCESS;
    	}
    }

### struts.xml ###

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE struts PUBLIC
    	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    	"http://struts.apache.org/dtds/struts-2.3.dtd">
    <struts>
    	<constant name="struts.devMode" value="true"></constant>
    	<package name="result" namespace="/" extends="struts-default">
    		<interceptors>
    		
    			<interceptor name="myInterceptor" class="com.it.action.MyInterceptor"></interceptor>
    		
    			<interceptor-stack name="myStack">
    				
    				<interceptor-ref name="myInterceptor">
    					
    				 	
    					
    					<param name="includeMethods">print,list</param>
    				</interceptor-ref>
    				
    				<interceptor-ref name="defaultStack"></interceptor-ref>
    			</interceptor-stack>
    		</interceptors>
    		
    		<default-interceptor-ref name="myStack"></default-interceptor-ref>
    		
    		<action name="DemoAction1_*" class="com.it.action.InterceptorAction" method="{1}">
    			<result name="success" type="dispatcher">/hello.jsp</result>
    		</action>
    	</package>
    	
    	
    </struts>

###  hello.jsp ###

<h1>testDemo</h1>

### 效果： ###

(1):print方法

![20190123190945855.png][]

### 控制台： ###

![20190123191008253.png][]

(2)list方法

![20190123191202160.png][]

### 控制台： ###

![2019012319122275.png][]

（3）add方法  没有被拦截

![20190123191254867.png][]

控制台：![20190123191313294.png][]

[20190123184451787.png]: /images/20220323/ebf321a570794541a9b80c010e5126b5.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTY2Nzcy_size_16_color_FFFFFF_t_70]: /images/20220323/3ce3e671b2074f108a137c38ece8cf98.png
[20190123185644811.png]: /images/20220323/4743cba15cfd475db0c58c3e02819ee4.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTY2Nzcy_size_16_color_FFFFFF_t_70 1]: /images/20220323/e2442d87ced74af08dd36c3b99d14476.png
[20190123190349675.png]: /images/20220323/83ae646602de444e9e2eb9ad0a97388a.png
[20190123190945855.png]: /images/20220323/a8f79df2ab6a4756854b9c5a26c0ec3d.png
[20190123191008253.png]: /images/20220323/70682baae6f44cde86f0bab5da21c685.png
[20190123191202160.png]: /images/20220323/ecc9e009b5084eecb5c87e5a5d1efa61.png
[2019012319122275.png]: /images/20220323/2c095144a93448d5b8dc5a6562ab0a24.png
[20190123191254867.png]: /images/20220323/f33c86278ba149b5ac011144351df242.png
[20190123191313294.png]: /images/20220323/2ef20d727c334cc18a7509d427783af1.png