初学struts2-入门案列

1.所需类库

<dependency>
  <groupId>junit</groupId>
  <artifactId>junit</artifactId>
  <version>3.8.1</version>
  <scope>test</scope>
</dependency>
<dependency>
  <groupId>javaee</groupId>
  <artifactId>javaee-api</artifactId>
  <version>5</version>
</dependency>

<dependency>
  <groupId>org.apache.struts</groupId>
  <artifactId>struts2-core</artifactId>
  <version>2.3.4.1</version>
</dependency>

<dependency>
  <groupId>org.apache.struts.xwork</groupId>
  <artifactId>xwork-core</artifactId>
  <version>2.3.4.1
  </version>
</dependency>

2.配置web-xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>
  <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>

3.配置文件

<?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">
        <action name="userAction" class="cn.happy.action.UserAction">
            <result name="success">/success.jsp</result>
        </action>
    </package>
</struts>
4.所需jsp页面

<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
  <s:form method="POST" action="userAction">
      <%--性能低--%>
      请输入用户名： <s:textfield  name="username"></s:textfield> <br/>
      <s:textfield name="password"></s:textfield><br/>
      <s:submit value="登陆"></s:submit>
  </s:form>
</body>
</html>

5.配置action

package cn.happy.action;

import com.opensymphony.xwork2.Action;

/**
 * Created by Happy on 2017-10-22.
 * 类  Action
 */
public class UserAction implements Action{
    //SpringMvc Controller
    public String execute() throws Exception {
        return SUCCESS;
    }
}
6.项目部署，运行即可