Servlet的web模块支持实战

谁践踏了优雅 2021-07-25 02:02 291阅读 0赞

**一 第一个模块crazyit**

1 CrazyitListener.java

package lee;
    
    import javax.servlet.*;
    
    public class CrazyitListener
        implements ServletContextListener
    {
        public void contextInitialized(ServletContextEvent sce)
        {
            System.out.println("--------crazyit模块被加载了--------");
        }
        public void contextDestroyed(ServletContextEvent sce)
        {}
    }

2 web-fragment.xml

<?xml version="1.0" encoding="GBK"?>
    <web-fragment xmlns="http://xmlns.jcp.org/xml/ns/javaee"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee  
        http://xmlns.jcp.org/xml/ns/javaee/web-fragment_3_1.xsd" version="3.1">
        
        <name>crazyit</name>
        <listener>
            <listener-class>lee.CrazyitListener</listener-class>
        </listener>
        <ordering>
            
            <before>
                
                <others/>
            </before>
        </ordering>
    </web-fragment>

3 压缩成crazyit.jar包

**二 第二个模块leegang**

1 LeegangListener.java

package lee;
    
    import javax.servlet.*;
    
    public class LeegangListener
        implements ServletContextListener
    {
        public void contextInitialized(ServletContextEvent sce)
        {
            System.out.println("--------leegang模块被加载了--------");
        }
        public void contextDestroyed(ServletContextEvent sce)
        {}
    }

2 web-fragment.xml

<?xml version="1.0" encoding="GBK"?>
    <web-fragment xmlns="http://xmlns.jcp.org/xml/ns/javaee"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee  
        http://xmlns.jcp.org/xml/ns/javaee/web-fragment_3_1.xsd" version="3.1">
        
        <name>leegang</name>
        
        <listener>
            <listener-class>lee.LeegangListener</listener-class>
        </listener>
        <ordering>
            
            <after>
                
                <name>crazyit</name>
            </after>
        </ordering>
    </web-fragment>

3 压缩成leegang.jar

**三 将第1步和第2步的两个jar包复位到Web应用的WEB-INF/lib目录下。并重启一下Web应用。**

**四 测试**

2019-09-07 08:36:37 Commons Daemon procrun stdout initialized
    --------crazyit模块被加载了--------
    --------leegang模块被加载了--------