Struts2学习笔记——基本配置

最新推荐文章于 2020-04-22 22:54:12 发布

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本文详细介绍了如何使用Struts2框架进行Web开发，包括下载jar库、配置web.xml、编写action代码、创建相关jsp页面等步骤，以及实现登录功能。

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首先下载Struts2的jar库。
地址：[url]http://struts.apache.org/download.cgi#struts232-SNAPSHOT[/url]
将需要的jar库拷贝到WEB-INF下的lib中。基本的9个包是：
commons-fileupload-xxx.jar
commons-io-xxx.jar
commons-lang-xxx.jar
commons-logging-xxx.jar
freemarker-xxx.jar
javasist-xxx.jar
ognl-xxx.jar
struts2-core-xxx.jar
xwork-core-xxx.jar

在web.xml中添加filter支持struts2

<filter>
  <filter-name>struts</filter-name>
  <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
  <init-param>
  	<param-name>struts.action.extension</param-name>
  	<param-value>action</param-value>
  </init-param>
</filter>
<filter-mapping>
  <filter-name>struts</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>

然后编写action代码：

package com.mm.action;

import com.opensymphony.xwork2.ActionSupport;

public class LoginAction extends ActionSupport {

	private static final long serialVersionUID = -4543171546615125867L;

	private String username;
	private String password;

	public String execute() {
		if ("lander".equals(username) && "rover".equals(password)) {
			return SUCCESS;
		}
		return LOGIN;
	}

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getPassword() {
		return password;
	}

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

}

接着在src下新建struts.xml文件：

<?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>
	<package name="struts2Test" extends="struts-default">
		<global-results>
			<result name="login">/login.jsp</result>
		</global-results>
	<action name="login" class="com.mm.action.LoginAction">
		<result name="success">/welcome.jsp</result>
	</action>
<!-- Add your actions here -->
</package>
</struts>

这样就完成了一个action。
login.jsp:

<%@ page language="java" contentType="text/html" pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<!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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
	<s:form action="login">
		<s:label value="登陆"></s:label>
		<s:textfield name="username" label="用户名"></s:textfield>
		<s:password name="password" label="密码"></s:password>
		<s:submit value="登录"></s:submit>
	</s:form>
</body>
</html>

welcome.jsp:

<%@ page language="java" contentType="text/html" pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<!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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
欢迎<s:property value="username"/>
</body>
</html>

一个简单但五脏齐全的struts2工程完成了。