环境：
IDEA
java1.8
struts2-core 2.5.18
一路下一步，名字自己随便填，
项目建好后修改pom.xml文件，加入struts2-core
添加tomcat：
+号添加web
添加tomcat
在resources下新建struts.xml
如果出现错误，Exception starting filter struts2
java.lang.ClassNotFoundException: org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter
手动删除再添加这个，然后修改tomcat的设置。
运行举例：
public class HelloWorldAction { private String name; public String execute() throws Exception { if (getName().equals("") || getName() == null) return "error"; return "success"; } public String getName() { return name; } public void setName(String name) { this.name = name; } }
HelloWorldAction.java
<?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"> <struts> <constant name="struts.enable.DynamicMethodInvocation" value="true" /> <package name="default" extends="struts-default"> <default-action-ref name="index" /> <action name="index" > <result name="success">/index.jsp</result> </action> <action name="hello" class="HelloWorldAction" method="execute"> <result name="success">/HelloWorld.jsp</result> <result name="error">/Error.jsp</result> </action> </package> </struts>
struts.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app 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-app_4_0.xsd" version="4.0"> <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>
web.xml
<%-- Created by IntelliJ IDEA. User: Flyuz Date: 2018/12/19 Time: 20:22 To change this template use File | Settings | File Templates. --%> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %> <%@ taglib prefix="s" uri="/struts-tags" %> <!DOCTYPE html> <html> <head> <title>Hello World</title> </head> <body> <h1>Hello World Struts2</h1> <form action="hello"> <label for="name">Please enter your name</label><br/> <input type="text" name="name"/> <input type="submit" value="Enter"/> </form> </body> </html>
index.jsp
<%-- Created by IntelliJ IDEA. User: Flyuz Date: 2018/12/19 Time: 20:26 To change this template use File | Settings | File Templates. --%> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib prefix="s" uri="/struts-tags" %> <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Hello World</title> </head> <body> Hello World, Welcome! <s:property value="name"/> </body> </html>
HelloWorld.jsp