Eclipse builds struts2 framework

Create a new dynamic web project;

Enter the project name;

After New Runtime, select the following,

Select the installation directory of tomcat;

Then as follows, complete;

The current directory structure is as follows; the java environment must be configured before;

If you did not select Generate web.xml when creating the project, right-click the project folder and select the following menu to generate web.xml;

Copy the struts2 package to the lib folder, then refresh it and it will be displayed;

Select all packages, right-click, select the following menu, and add the package to the project;

Create struts.xml in the src folder,

struts.xml，

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
    "http://struts.apache.org/dtds/struts-2.5.dtd">
<!-- START SNIPPET: xworkSample -->
<struts>
   <!-- 是否开启动态方法调用 -->
    <constant name="struts.enable.DynamicMethodInvocation" value="true" />
    <package name="default" namespace="/" extends="struts-default">
         <action name="login" class="com.example.struts2.LoginAction" method="login">
            <result name="success">/success.jsp</result>
            <result name="error">/error.jsp</result>
        </action>
    </package>
</struts>

Right click on the src folder and create a new package,

Enter the package name,

After Finish, as follows:

Right click on the newly created package and create a new class,

Enter the class name;

package com.example.struts2;

import javax.servlet.http.HttpServletRequest; 
import org.apache.struts2.ServletActionContext;
  
public class LoginAction {
     
    HttpServletRequest req = ServletActionContext.getRequest();
    String username = req.getParameter("username");
    String password = req.getParameter("password");   
     
    public String getUsername() {
        return username;
    } 
  
    public void setUsername(String username) {
        this.username = username;
    }  
 
    public String getPassword() {
        return password;
    }  
 
    public void setPassword(String password) {
        this.password = password;
    }  
 
    public String login(){
        if("xiaoBaby".equals(username)
                && "123456".equals(password)){
            return "result";
        }else{
            return "error";
        }
    }
     
}

Then create 3 more jsps;

index.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>Insert title here</title>
</head>
<body>  
    <form action="login.action" method="post">  
        用户名：<input type="text" name="username">  
        密码：<input type="text" name="password">  
        <input type="submit" value="提交">  
    </form>  
</body>
</html>

Success.jsp and error.jsp are simplified, just add a string between <body></body>;

The project structure at this time is as follows:

There is also web.xml code;

<?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_3_1.xsd" version="3.1">
  <display-name>sts</display-name>
  
  <filter>
    <filter-name>struts2</filter-name>
    <filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>

  </filter>
  <filter-mapping>
    <filter-name>struts2</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
</web-app>

Then right-click the project folder and select the following menu,

The following dialog box appears, Finish;

index.jsp will not come out. Check the console output and it contains an error.

java.lang.ClassNotFoundException: .apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter，

I want to put in web.xml

<filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>

Change to

<filter-class>
org.apache.struts2.dispatcher.FilterDispatcher
</filter-class>

Then run it again, and the following error appears again; there is time to continue;

Eclipse builds struts2 framework

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