建立

New—Other—輸入filter(勾選show all wizards)會出現
###配置

 <?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
 

    id="WebApp_ID" version="3.0">
    <display-name>Filter</display-name>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
    <filter>
        <display-name>FilterDemo1</display-name>
        <filter-name
 
>FilterDemo1</filter-name>
        <filter-class>com.demo.filter.FilterDemo1</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>

    <filter-mapping
 
>
        <filter-name>FilterDemo1</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>