包目錄檢視

領域模型層User.java

package com.xuzengqiang.project.domain;

public class User
{
	private String username;
	private String password;

	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;
	}

}
 

Index.java用於首頁跳轉，訪問WEB-INF下面的index.jsp頁面

package com.xuzengqiang.project.struts2.action;

import com.opensymphony.xwork2.ActionSupport;

@SuppressWarnings("serial")
public class IndexAction extends ActionSupport
{
	
	public String execute() throws Exception
	{
		return "success";
	}
}

package com.xuzengqiang.project.struts2.action;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;


public class UserAction extends ActionSupport
{
	private static final long serialVersionUID = 3252129927051594877L;
	
	private String username;
	private String password;
	
	
	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;
	}

	public String login() throws Exception
	{
		String username=getUsername();
		String password=getPassword();
		if("xuzengqiang".equals(username) && "123".equals(password))
		{
			HttpServletRequest request=ServletActionContext.getRequest();
			HttpSession session=request.getSession();
			session.setAttribute("username", username);
			return "user_login_success";
		}
		return "user_login_failure";
	}
		
}
 

package com.xuzengqiang.project.view.component;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.components.UIBean;

import com.opensymphony.xwork2.util.ValueStack;

@SuppressWarnings("all")
public class CssLink extends UIBean
{
	private String sourcePath="";
	private String templateName="csslink.ftl";

	public String getSourcePath()
	{
		return sourcePath;
	}
	
	public void setSourcePath(String sourcePath)
	{
		this.sourcePath=sourcePath;
	}
	
	public String getTemplateName()
	{
		return templateName;
	}
	
	public void setTemplateName(String templateName)
	{
		this.templateName=templateName;
	}

	public CssLink(ValueStack stack, HttpServletRequest request, HttpServletResponse response)
	{
		super(stack, request, response);
	}
	
	@Override
	protected Object findValue(String expr, Class toType)
	{
		if(null !=expr)
		{
			return super.findValue(expr, toType);
		}
		return null;
	}
	
	@Override
	protected void evaluateExtraParams()
	{
		super.evaluateExtraParams(); //新增引數，在freemarker的模板中就可以使用${parameters.sourcePath}獲取路徑了
		if(sourcePath!=null)
		{
			addParameter("sourcePath", findValue(getSourcePath() , String.class));
		}
	}
	
	//返回模板名稱
	@Override
	protected String getDefaultTemplate()
	{
		return templateName;
	}
}

CssLinkTag.java，需繼承ComponentTagSupport類

package com.xuzengqiang.project.view.tag;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.components.Component;
import org.apache.struts2.views.jsp.ComponentTagSupport;

import com.opensymphony.xwork2.util.ValueStack;
import com.xuzengqiang.project.view.component.CssLink;

//fm:cssLink 用作css樣式的連結
public class CssLinkTag extends ComponentTagSupport
{
	private static final long serialVersionUID = 5431625114311564858L;
	private String sourcePath = "";


	public String getSourcePath()
	{
		return sourcePath;
	}

	public void setSourcePath(String sourcePath)
	{
		this.sourcePath = sourcePath;
	}

	@Override
	public Component getBean(ValueStack valStack, HttpServletRequest request, HttpServletResponse response)
	{
		return new CssLink(valStack, request, response);
	}

	@Override
	/*
	 * 引數的初始化
	 */
	protected void populateParams()
	{
		super.populateParams();
		CssLink cssLink = (CssLink) component;
		cssLink.setSourcePath(getSourcePath());
	}
}

<link rel="stylesheet" type="text/css" href="${parameters.sourcePath}"/>

framework-tag.tld，拷貝struts2-core-....jar包目錄下的META-INF下的struts-tags然後重新命名即可。

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<taglib xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	version="2.0"
	xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd">
	<display-name>Framework Tags</display-name>
	<tlib-version>2.3</tlib-version>
	<short-name>fm</short-name>
	<uri>/framework-tags</uri>
	<tag>
		<description><![CDATA[struts2結合freemarker自定義標籤]]></description>
		<name>cssLink</name>
		<tag-class>com.xuzengqiang.project.view.tag.CssLinkTag</tag-class>
		<body-content>empty</body-content>
		<attribute>
			<name>sourcePath</name>
			<required>false</required>
			<rtexprvalue>false</rtexprvalue>
		</attribute>
		<dynamic-attributes>false</dynamic-attributes>
	</tag>
</taglib>

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-2.1.dtd">
<struts>
    <constant name="struts.enable.DynamicMethodInvocation" value="true"></constant>
    <package name="index" extends="struts-default">  
	     <action name="index" class="com.xuzengqiang.project.struts2.action.IndexAction">  
	         <result name="success">/WEB-INF/index.jsp</result>  
	     </action>  
    </package>
	<package name="user" extends="struts-default">
		 <action name="user" class="com.xuzengqiang.project.struts2.action.UserAction">
			 <result name="user_login_success">/WEB-INF/success.jsp</result>
			 <result name="user_login_failure">/WEB-INF/index.jsp</result>
		 </action>
	</package>
		
</struts>

index.jsp，使用的時候需要加上<@taglib prefix="fm" uri="/framework-tags" %>，呼叫的時候使用<fm:cssLink 屬性1>即可。

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="fm" uri="/framework-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
	<fm:cssLink sourcePath="/ProjectTest/css/index.css" />
	<title>測試用例</title>
</head>
	
<body>
	<div class="content">
		<div class="login">
			<form action="${pageContext.request.contextPath}/user!login" method="post">
				賬號:<input type="text" name="username"/><br/>
				姓名:<input type="text" name="password"/><br/>
				<input type="submit" value="登入"/>
			</form>	
		</div>
	</div>
</body>
</html>

web.xml，如果要將配置檔案struts.xml放入到WEB-INF下面的某個目錄下面，可以在過濾器StrutsPreparedAndExecuteFilter中配置config引數。

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>ProjectTest</display-name>
  <filter>
  	<filter-name>strutsPrepareAndExecuteFilter</filter-name>
  	<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
  	<init-param>
  		<param-name>config</param-name>
		<param-value>
				struts-default.xml,
				struts-plugin.xml,      
				../configuration/struts.xml
		</param-value>
  	</init-param>
  </filter>
  <filter-mapping>
  	<filter-name>strutsPrepareAndExecuteFilter</filter-name>
  	<url-pattern>/*</url-pattern>
  </filter-mapping>
  
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>