是按最简单的例子在写的，但总是404.。-慕课网

是按最简单的例子在写的，但总是404.。

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慕标3341450

2018-09-15 16:44

本人小白，刚入struts2.之前用的2.5.17版，但是没有blank。war。。所以回装了2.3版本。但是实验最简单的action例子总是失败。代码如下：web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" id="WebApp_ID" version="4.0">
<display-name>HelloWorld</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>

<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>

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>
        <package name="default" namespace="/" extends="struts-default" strict-method-invocation="false">
        
        <action name="helloworld" class="cn.xhcoding.action.HelloWorldAction">
            
            <result>/result.jsp</result>
        </action>

</package>
</struts>

action类

package cn.xhcoding.action;

import com.opensymphony.xwork2.ActionSupport;

public class HelloWorldAction extends ActionSupport {
@Override
    public String execute() throws Exception {
        System.out.println("正在执行的Action");
        // 返回视图 SUCCESS，这是框架定义
        return SUCCESS;
    }
}

result.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Action Result</title>
</head>
<body>
<h1>恭喜成功配置好基本的struts2环境</h1>
<h2>Hello World, I am Successful</h2>
</body>
</html>

index.jsp

</body>
</html>

.可以显示