struts2笔记（1）——搭建一个HelloWorld_struts2搭建以一个helloworld-优快云博客

本文链接：https://blog.youkuaiyun.com/Ascend2015/article/details/77876139

本文介绍如何使用Struts2框架搭建简单的Web应用，包括导入依赖、创建Action类、配置struts.xml及web.xml等步骤。

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1.导入struts2相关依赖

IDE使用IDEA2017
以下是maven的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>xiaoyin</groupId>
  <artifactId>structs2_01</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>structs2_01 Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>test</scope>
    </dependency>

    <dependency>
      <groupId>org.apache.struts</groupId>
      <artifactId>struts2-core</artifactId>
      <version>2.3.24</version>
    </dependency>
  </dependencies>
  <build>
    <finalName>structs2_01</finalName>
  </build>
</project>

2.新建action类

package com.xiaoyin.hello;

public class HelloAction {
    public String hello(){
        System.out.println("Hello world");
        return "hello world";
    }
}

3.创建struts.xml

以下是helloworld测试用的文档

<?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="hello" extends="struts-default" namespace="/hello" >
        <action name="HelloAction" class="com.xiaoyin.hello.HelloAction\" method="hello">
            <result name="success">/hello.jsp</result>
        </action>
    </package>
</struts>

struts.xml的默认文档可在Maven: org.apache.struts:struts2-core:2.3.24 下根路径找到。

4.在web.xml中配置struts2的过滤器

<?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_3_1.xsd"
         version="3.1">

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

  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
  </welcome-file-list>
  <!-- 配置struts2核心过滤器 -->
  <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>