Maven构建Struts2项目

1.添加Struts2依赖

这里主需要在pom.xml中添加一个struts-core的依赖即可：

 <project
 xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.carson.demo</groupId>
   <artifactId>struts2</artifactId>
   <packaging>war</packaging>
   <version>0.0.1-SNAPSHOT</version>
   <name>struts2 Maven Webapp</name>
   <url>http://maven.apache.org</url>

   <!-- 属性配置 -->
   <properties>
       <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   </properties>

   <dependencies>
   <!-- junit -->
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
       <version>4.9</version>
       <scope>test</scope>
     </dependency>

     <!-- struts2依赖包 -->
     <dependency>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-core</artifactId>
         <version>2.3.14</version>
     </dependency>

   </dependencies>
   <build>
     <finalName>struts2</finalName>
   </build>
 </project>

之后，Maven会自动从网上下载struts2需要的其他依赖包

2.新建一个Action

在src/main/java目录下新建一个UserAction.java

 package com.carson.demo.action;

 import java.io.UnsupportedEncodingException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

 import org.apache.struts2.ServletActionContext;
 import com.opensymphony.xwork2.ActionSupport;

 public class UserAction extends ActionSupport {

     private static final long serialVersionUID = 1L;

     public String execute(){
         return SUCCESS;
     }

     public String login() {
         try {
             HttpServletRequest request = ServletActionContext.getRequest();
             HttpServletResponse response = ServletActionContext.getResponse();
             request.setCharacterEncoding("UTF-8");
             response.setContentType("text/html;charset=utf-8");
             String username = request.getParameter("username");
             String password = request.getParameter("password");
             System.out.println("name->" + username + ",password->"
                     + password);
             if ("admin".equals(username) && "123456".equals(password)) {
                 return SUCCESS;
             } else {
                 return "login";
             }
         } catch (UnsupportedEncodingException e) {
             e.printStackTrace();
         }
         return SUCCESS;
     }
 }

3.配置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>

    <constant name="struts.i18n.reload" value="false" />
    <constant name="struts.devMode" value="false" />

    <include file="struts-default.xml" />

    <package name="default" extends="struts-default" namespace="/">

        <action name="login" class="com.carson.demo.action.UserAction" method="login">
            <result name="success">index.jsp</result>
            <result name="login">login.jsp</result>
        </action>

    </package>

</struts>

4.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>
    <init-param>
        <param-name>config</param-name>
        <param-value>../../resources/struts.xml</param-value>
    </init-param>

    <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>
    <welcome-file-list>
        <welcome-file>login.jsp</welcome-file>
    </welcome-file-list>
</web-app>

5.测试

新建两个页面login.jsp,index.jsp,内容如下：

login.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>登录界面</title>
    </head>  

    <body>
<form action="login" method="post">
<table>
<tr>
<td>用户名：</td>
<td><input type="text" name="username" /> </td>
</tr>
<tr>
<td>密码：</td>
<td><input type="text" name="password" /> </td>
</tr>
<tr>
<td colspan="2">
<input type="submit" value="登录" />
<input type="reset" value="重置" /></td>
</tr>
</table>
</form>
    </body>
</html> 

index.jsp页面：

 <%@ 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>Hello Maven</title>
     </head>  

     <body>
         <p>大家好，欢迎进入Maven Struts2应用！</p>
     </body>
 </html> 

启动之后就可以看到登录页面，至此，用Maven构建Struts2项目完成。