Question

项目结构
Project structure

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
          http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         version="3.0">

    <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>

</web-app>

HelloWorldAction.java

package com.example.web.action;

import com.opensymphony.xwork2.ActionSupport;

public class HelloWorldAction extends ActionSupport {

    private String message;

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    @Override
    public String execute() throws Exception {
        System.out.println("Hello from HelloWorldAction class!");
        setMessage("Hello World!");
        return super.execute();
    }
}

您好-world.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Hello World JSP</title>
</head>
<body>

This is message ${message}

</body>
</html>

当我链接到/ hello-world时，我只看到＆＃34;这是消息＆＃34;文本但没有$ {message}的值。此外，控制台不会通过System.out.println（）显示消息。因此，HelloWorldAction不会调用。我做错了什么？附：我使用struts2-convention-plugin-2.3.16.3。

插入log4j并查看日志后，这个问题就解决了。在我的课堂上没有asm图书馆 classpath

Struts2 Convention插件不扫描Action类

0 个答案: