使用Maven搭建Struts2.3.34项目

1 使用Myeclipse2017创建Maven项目

2 设置pom.xml

<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.sl</groupId>    <artifactId>struts2</artifactId>    <packaging>war</packaging>    <version>0.0.1-SNAPSHOT</version>    <name>struts2</name>    <url>http://maven.apache.org</url>    <dependencies>        <dependency>            <groupId>junit</groupId>            <artifactId>junit</artifactId>            <version>4.12</version>            <scope>test</scope>        </dependency>        <!-- https://mvnrepository.com/artifact/org.apache.struts/struts2-core -->        <dependency>            <groupId>org.apache.struts</groupId>            <artifactId>struts2-core</artifactId>            <version>2.3.34</version>        </dependency>    </dependencies>    <build>        <finalName>struts2</finalName>    </build></project>

3 struts2下载包
http://mirrors.tuna.tsinghua.edu.cn/apache/struts/2.3.34/struts-2.3.34-all.zip

4 设置web.xml
将struts下载包中示例
struts-2.3.34\apps\struts2-blank\WEB-INF\web.xml
复制到自己的工程目录
\src\main\webapp\WEB-INF\web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app id="WebApp_9" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">    <display-name>Struts Blank</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>    <welcome-file-list>        <welcome-file>index.html</welcome-file>    </welcome-file-list>    <!-- Restricts access to pure JSP files - access available only via Struts action -->    <security-constraint>        <display-name>No direct JSP access</display-name>        <web-resource-collection>            <web-resource-name>No-JSP</web-resource-name>            <url-pattern>*.jsp</url-pattern>        </web-resource-collection>        <auth-constraint>            <role-name>no-users</role-name>        </auth-constraint>    </security-constraint>    <security-role>        <description>Don't assign users to this role</description>        <role-name>no-users</role-name>    </security-role></web-app>

5 设置struts.xml
将struts下载包中示例
struts-2.3.34\apps\struts2-blank\WEB-INF\src\java\struts.xml
复制到自己的工程目录
\src\main\resources\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.enable.DynamicMethodInvocation" value="false" />    <constant name="struts.devMode" value="true" />    <package name="default" namespace="/" extends="struts-default">        <default-action-ref name="index" />        <global-results>            <result name="error">/WEB-INF/jsp/error.jsp</result>        </global-results>        <global-exception-mappings>            <exception-mapping exception="java.lang.Exception" result="error"/>        </global-exception-mappings>        <action name="index">            <result type="redirectAction">                <param name="actionName">HelloWorld</param>                <param name="namespace">/example</param>            </result>        </action>    </package>    <include file="example.xml"/>    <!-- Add packages here --></struts>

PS：也可参照struts2-core-2.3.34.jar中的struts-default.xml

6 编写测试Action
创建src\main\java\com\sl\action\HelloAction.java

package com.sl.action;public class HelloAction {    public String execute() {        System.out.println("HelloAction.execute()");        return "success";    }}

7 修改struts.xml，添加对应action配置信息

<!-- <action name="index">    <result type="redirectAction">        <param name="actionName">HelloWorld</param>        <param name="namespace">/example</param>    </result></action>--><action name="hello" class="com.sl.action.HelloAction">    <!-- name="success"可省略 -->    <result name="success">/index.jsp</result></action>

8 编译工程

9 部署tomcat服务器

10 测试访问
http://localhost:8080/struts2/hello

其他
1 工程目录

2 设置JRE System Library为1.8

3 解决JSP页面报错
未导入servlet-api时，JSP页面会报错
struts2 The superclass “javax.servlet.http.HttpServlet” was not found on the Java Build Path

修改pom.xml，添加javax.servlet-api依赖

<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api --><dependency>    <groupId>javax.servlet</groupId>    <artifactId>javax.servlet-api</artifactId>    <version>4.0.0</version>    <scope>provided</scope></dependency>