Stripes視圖框架實現ActionBean視圖訪問

 Stripes最基本的實現是相似於Struts的請求，但沒有Struts那麼配置繁瑣。下面就來看看怎樣實現一個web應用的Action訪問操做。本篇博文爲設計Stripes的三種訪問方式：普通Action的映射訪問、類Servlet訪問方式、Rest變參訪問方式。前幾天還沒將Stripes應用示例打通，今天又本着不解決問題死不罷休的精神繼續去弄，終於搞明白了。

一、編寫Stripes的web.xml配置文件

 該文件定義了第三方的工具包、過濾器類、以及映射關係和訪問格式；在此配置文件中有兩種Stripes的配置（特定模板的Action過濾配置和動態URL路徑配置），它們互不排斥，相互包容，方便了用戶不一樣業務需求下的訪問模式。其配置內容以下：

<?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"  
    version="2.5">  
      
    <!-- 若是沒使用到，此內容能夠不添加 -->  
    <context-param>  
        <param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>  
        <param-value>StripesResources</param-value>  
    </context-param>  
      
    <!-- 基本ActionBean訪問過濾配置 -->  
    <filter>  
        <display-name>Stripes Filter</display-name>  
        <filter-name>StripesFilter</filter-name>  
        <filter-class>net.sourceforge.stripes.controller.StripesFilter</filter-class>  
        <init-param>  
            <param-name>ActionResolver.Packages</param-name>  
            <param-value>com.boonya.stripes.actions</param-value>  
        </init-param>  
        <init-param>  
            <param-name>Interceptor.Classes</param-name>  
            <param-value>  
                net.sourceforge.stripes.integration.spring.SpringInterceptor  
            </param-value>  
        </init-param>  
    </filter>  
    <filter-mapping>  
        <filter-name>StripesFilter</filter-name>  
        <servlet-name>StripesDispatcher</servlet-name>  
        <dispatcher>REQUEST</dispatcher>  
    </filter-mapping>  
      
    <servlet>  
        <servlet-name>StripesDispatcher</servlet-name>  
        <servlet-class>net.sourceforge.stripes.controller.DispatcherServlet</servlet-class>  
        <load-on-startup>1</load-on-startup>  
    </servlet>  
    <servlet-mapping>  
        <servlet-name>StripesDispatcher</servlet-name>  
        <url-pattern>*.action</url-pattern>  
    </servlet-mapping>  
      
    <!-- 動態配置隱射過濾器 -->  
  <filter>  
      <description>Dynamically maps URLs to ActionBeans.</description>  
      <display-name>Stripes Dynamic Mapping Filter</display-name>  
      <filter-name>DynamicMappingFilter</filter-name>  
      <filter-class>  
          net.sourceforge.stripes.controller.DynamicMappingFilter  
      </filter-class>  
      <init-param>  
          <param-name>ActionResolver.Packages</param-name>  
          <param-value>com.boonya.stripes.actions</param-value>  
      </init-param>  
  </filter>  
    
  <filter-mapping>  
      <filter-name>DynamicMappingFilter</filter-name>  
      <url-pattern>/*</url-pattern>  
      <dispatcher>REQUEST</dispatcher>  
      <dispatcher>FORWARD</dispatcher>  
      <dispatcher>INCLUDE</dispatcher>  
  </filter-mapping>  
   
   <!-- 歡迎界面 -->  
    <welcome-file-list>  
        <welcome-file>index.jsp</welcome-file>  
    </welcome-file-list>  
  
</web-app>

二、導入須要的jar包到項目WEB-INF的lib目錄下

此處須要加入的jar包，因爲Stripes實現的時候用到了springframework的jar包，因此須要在項目中添加，不然在訪問頁面時會有異常產生。示例項目目錄結構以下圖：

注：上面所示的Jar有個別不須要，若是須要使用Spring整合建議保留；另外，根目錄下下還須要一個消息配置文件StripesResources.properties，缺乏它在數據驗證的時候沒法處理消息信息。

三、編寫抽象的ActionBean，AbstractActionBean

由於在每一個ActionBean中都使用到了上下文對象設置，這部分屬於公共行爲，因此將其抽象出來。

package com.boonya.stripes.actions;  
  
import java.io.Serializable;  
  
import net.sourceforge.stripes.action.ActionBean;  
import net.sourceforge.stripes.action.ActionBeanContext;  
import net.sourceforge.stripes.action.SimpleMessage;  
  
public abstract class AbstractActionBean implements ActionBean, Serializable {  
  
  private static final long serialVersionUID = -1767714708233127983L;  
  
  protected static final String ERROR = "/WEB-INF/Error.jsp";  
  
  protected transient ActionBeanContext context;  
  
  protected void setMessage(String value) {  
    context.getMessages().add(new SimpleMessage(value));  
  }  
    
  public ActionBeanContext getContext() {  
    return context;  
  }  
  
  public void setContext(ActionBeanContext context) {  
    this.context = context;  
  }  
  
}

注：系統中公用的頁面也能夠設置在這裏，應爲這是全部對象的基本行爲方式和處理邏輯。

四、編寫業務須要的ActionBean

方式一：基本Action映射訪問

package com.boonya.stripes.actions;  
  
import net.sourceforge.stripes.action.DefaultHandler;  
import net.sourceforge.stripes.action.ForwardResolution;  
import net.sourceforge.stripes.action.HandlesEvent;  
import net.sourceforge.stripes.action.SessionScope;  
  
@SessionScope  
public class HelloActionBean extends AbstractActionBean {  
  
    private static final long serialVersionUID = -8946154817549504368L;  
      
    protected static final String HELLO ="/WEB-INF/Hello.jsp";  
      
    protected static final String BLOG ="/WEB-INF/Blog.jsp";  
    // 傳遞到指定的頁面的參數  
    private String name="boonya-only-hellos";  
  
    public void setName(String name) {  
        this.name = name;  
    }  
  
    public String getName() {  
        return name;  
    }  
  
    /** 
     * 默認跳轉頁面(@DefaultHandler) 
     * @return 
     */  
    @DefaultHandler  
    public ForwardResolution view() {  
        return new ForwardResolution(HELLO);  
    }  
      
    /** 
     * 指定跳轉頁面(@HandlesEvent)處理,能夠不添加該註解 
     * @return 
     */  
    @HandlesEvent("viewToBlog")  
    public ForwardResolution viewToBlog() {  
        this.name=this.getClass().getName();  
        return new ForwardResolution(BLOG);  
    }  
  
}

方式二：類Servlet訪問方式

package com.boonya.stripes.actions;  
  
import net.sourceforge.stripes.action.ActionBeanContext;  
import net.sourceforge.stripes.action.DefaultHandler;  
import net.sourceforge.stripes.action.ForwardResolution;  
import net.sourceforge.stripes.action.HandlesEvent;  
import net.sourceforge.stripes.action.UrlBinding;  
// URL 隱射路徑  
@UrlBinding("/hellos")  
public class WorldActionBean  extends AbstractActionBean {  
      
    private static final long serialVersionUID = 3073270783412011577L;  
  
    protected static final String WORLD ="/WEB-INF/World.jsp";  
      
    protected static final String BLOG ="/WEB-INF/Blog.jsp";  
  
    // 傳遞到指定的頁面的參數  
    private String name="boonya-page";  
      
    protected transient ActionBeanContext context;  
      
    @Override  
    public ActionBeanContext getContext() {  
            return context;  
    }  
     @Override  
    public void setContext(ActionBeanContext context) {  
            this.context = context;  
    }  
  
    public void setName(String name) {  
        this.name = name;  
    }  
  
    public String getName() {  
        return name;  
    }  
  
    /** 
     * 默認跳轉頁面(@DefaultHandler) 
     * @return 
     */  
    @DefaultHandler  
    public ForwardResolution view() {  
        return new ForwardResolution(WORLD);  
    }  
      
    /** 
     * 指定跳轉頁面(@HandlesEvent)處理,能夠不添加該註解 
     * @return 
     */  
    @HandlesEvent("viewToBlog")  
    public ForwardResolution viewToBlog() {  
        this.name=this.getClass().getName();  
        return new ForwardResolution(BLOG);  
    }  
  
}

方式三：Rest風格變參訪問

package com.boonya.stripes.actions;  
  
import net.sourceforge.stripes.action.DefaultHandler;  
import net.sourceforge.stripes.action.ForwardResolution;  
import net.sourceforge.stripes.action.HandlesEvent;  
import net.sourceforge.stripes.action.UrlBinding;  
// URL 隱射路徑  
@UrlBinding("/helloworld/{name}")  
public class HelloWorldActionBean  extends AbstractActionBean {  
      
    private static final long serialVersionUID = 2276458379123668500L;  
  
    protected static final String WORLD ="/WEB-INF/HelloWorld.jsp";  
      
    protected static final String BLOG ="/WEB-INF/Blog.jsp";  
  
    // 傳遞到指定的頁面的參數  
    private String name;  
  
    public void setName(String name) {  
        this.name = name;  
    }  
  
    public String getName() {  
        return name;  
    }  
  
    /** 
     * 默認跳轉頁面(@DefaultHandler) 
     * @return 
     */  
    @DefaultHandler  
    public ForwardResolution view() {  
        return new ForwardResolution(WORLD);  
    }  
      
    /** 
     * 指定跳轉頁面(@HandlesEvent)處理,能夠不添加該註解 
     * @return 
     */  
    @HandlesEvent("viewToBlog")  
    public ForwardResolution viewToBlog() {  
        this.name=this.getClass().getName();  
        return new ForwardResolution(BLOG);  
    }  
  
}

五、編寫測試JSP頁面

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>Insert title here</title>  
<style type="text/css">  
   body{  
      text-decoration: underline;  
      color: blue;  
      font-size: 12px;  
      font-family: '仿宋體';  
   }  
</style>  
</head>  
<body>  
 <h3> <a href="actions/Hello.action">forward風格測試</a></h3>  
 <h3> <a href="hellos">Servlet風格測試</a></h3>  
 <h3> <a href="helloworld/boonya-test-rest">Rest風格的測試</a></h3>  
</body>  
</html>

Hello.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"  
    pageEncoding="UTF-8"%>  
<%@ taglib prefix="stripes"  
    uri="http://stripes.sourceforge.net/stripes.tld"%>  
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  
<html>  
<title>Hello-page</title>  
<body>  
    Hello ${actionBean.name}  
    <br />  
    <br />  
    <stripes:link beanclass="com.boonya.stripes.actions.HelloActionBean">  
        <stripes:param name="name" value="boonya-hello" />Try again</stripes:link>  
    <br>  
    <stripes:link beanclass="com.boonya.stripes.actions.HelloActionBean" event="viewToBlog">  
    from Hello-page to visit boonya's blog  
    </stripes:link>  
    <br>  
</body>  
</html>

World.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"  
    pageEncoding="UTF-8"%>  
<%@ taglib prefix="stripes"  
    uri="http://stripes.sourceforge.net/stripes.tld"%>  
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  
<html>  
<title>World-page</title>  
<body>  
    Hello ${actionBean.name}  
    <br />  
    <br />  
    <stripes:link beanclass="com.boonya.stripes.actions.WorldActionBean">  
        <stripes:param name="name" value="boonya-world" />Try again</stripes:link>  
    <br>  
    <stripes:link beanclass="com.boonya.stripes.actions.WorldActionBean" event="viewToBlog">  
    from World-page to visit boonya's blog  
    </stripes:link>  
    <br>  
</body>  
</html>

HelloWorld.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"  
    pageEncoding="UTF-8"%>  
<%@ taglib prefix="stripes"  
    uri="http://stripes.sourceforge.net/stripes.tld"%>  
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  
<html>  
<title>HelloWorld-page</title>  
<body>  
    Hello ${actionBean.name}  
    <br />  
    <br />  
    <stripes:link beanclass="com.boonya.stripes.actions.HelloWorldActionBean">  
        <stripes:param name="name" value="boonya-world" />Try again</stripes:link>  
    <br>  
    <stripes:link beanclass="com.boonya.stripes.actions.HelloWorldActionBean" event="viewToBlog">  
    from HelloWorld-page to visit boonya's blog  
    </stripes:link>  
    <br>  
</body>  
</html>

Blog.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>Blog-Page</title>  
</head>  
<body>  
 <h3>welcome to  boonya's blog.</h3>  
   
 <h2 style="color: blue;">from action's class name: <font color="red">${actionBean.name}</font> </h2>  
</body>  
</html>

Error.jsp沒什麼特別的內容故不在此處寫出。

六、項目部署測試訪問

如下是測試訪問的效果圖：

系統首頁顯示：

forward顯示：

servlet顯示：

rest顯示：

示例程序下載地址：http://download.csdn.net/detail/boonya/6506145