(五)- 使用Maven构建Struts2项目

在前两篇博客中,使用Maven构建了Web项目,在这篇博客中写一下,怎样构建一个简单的Struts2项目。

在准备过程中发现,要使用好Maven,个人觉得要好好利用这两个网站:

http://mvnrepository.com/

http://search.maven.org/

由于自己对Maven的理解不是非常深,所以学习的时候遇到很多简单的问题都没法解决委屈
,走了很多弯路

1. 新建一个基本的Web项目

这和前面讲的是一样的,可以参考前面的博客

2. 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.deppon.demo</groupId>
  <artifactId>test02</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>test02 Maven Webapp</name> 
  <url>http://maven.apache.org</url>
  
  <!-- 属性配置 -->
  <properties>
      <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>
  
  <dependencies>  
  	
  	<!-- 添加JUnit -->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    
    <!-- Struts2 依赖 -->
	<dependency>
		<groupId>org.apache.struts</groupId>
		<artifactId>struts2-core</artifactId>
		<version>2.3.1</version>
	</dependency>
	
  </dependencies>
  <build>
    <finalName>test02</finalName>
  </build>
</project>

之后,Maven会自动从网上下载struts2需要的其他依赖包,可以看一下这里:

是不是都有了,有的时候Maven可能会报错,由于网络的原因(个人认为大多是网络问题,导致下载依赖包出错难过
),可以从上面提到的两个网站手动下载

3. 新建一个Action

package com.deppon.test02.action;

import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport {
	private static final long serialVersionUID = -1417237614181805435L;
	
	private String name;
	private String password;
	
	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	/**
	 * 跳转到登录界面
	 * @return
	 */
	public String login_input() {
		return SUCCESS;
	}
	
	/**
	 * 登录
	 * @return
	 */
	public String login() {
		System.out.println("name->" + name);
		System.out.println("password->" + password);
		
		return SUCCESS;
	}
}

struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
	<constant name="struts.i18n.encoding" value="utf-8"></constant>
	<constant name="struts.multipart.maxSize" value="20971520"/>
    <constant name="struts.devMode" value="true" />
    
	<package name="p_user" namespace="/" extends="struts-default">
		<action name="login_input" class="com.deppon.test02.action.UserAction" method="login_input">
			<result name="success">
				/login.jsp
			</result>
		</action>
		
		<action name="login" class="com.deppon.test02.action.UserAction" method="login">
			<result name="success">
				/login_success.jsp
			</result>
		</action>
	</package>
	
</struts>

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>

	<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>

index.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>主页</title>
	</head>
	
	<body>
		<a href="login_input">去登陆</a>
	</body>
</html>

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">
			name:<input type="text" name="name" />
			password:<input type="password" name="password" />
			
			<input type="submit" value="登录" />
		</form>
	</body>
</html>

login_success.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!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>登录成功</title>
	</head>
	
	<body>
		<s:form action="login" namespace="/" method="post">
			<s:textfield name="name" label="name"></s:textfield>
			<s:password name="password" label="password"></s:password>
			
			<s:submit value="Login"></s:submit>
		</s:form>
	</body>
</html>

项目结构如下图所示:


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