Using PHP as a Spring MVC View via Quercus(转)

原贴：

http://blog.caucho.com/2009/04/14/using-php-as-a-spring-mvc-view-via-quercus/

This week, I’ve been prepping for a talk on Quercus in which I promised to show a demo of Spring MVC using a PHP view. So that means that I actually had to do it. Turns out it was quite easy and PHP makes for a very nice, compact view technology for Spring MVC. This is a bit of tease since the code for this won’t go out until at least next week, but since a number of people have been asking for this a while, I thought I’d give a preview…

First, let me show how it looks by using the sample “ImageDB” application that ships with Spring. Here’s a screenshot of the app in action:

Basically, you upload an image to the page and it keeps track of what you’ve uploaded in a database. Here are the JSP and PHP views side-by-side:

<%@ page session="false" %> < %@ page import="java.util.List, java.util.Iterator, org.springframework.samples.imagedb.ImageDescriptor" %>

<!– imageList.jsp –>

<% List images = (List) request.getAttribute("images"); for (Iterator it = images.iterator(); it.hasNext();) { ImageDescriptor image = (ImageDescriptor) it.next(); %> < table border="1" cellspacing="0" cellpadding="5"> <tr><td width="10%">Name</td><td><%= image.getName() %> </td></tr> <tr><td colspan="2"><img src="data:imageContent?name=<%= image.getName() %>" height="100"></td></tr> <tr><td>Description (<%= image.getDescriptionLength() %>)</td><td><%= image.getShortDescription() %> </td></tr> < /table> < p> < % } %>

<p> < table border="1" cellspacing="0" cellpadding="5"> < form action="imageUpload" method="post" encType="multipart/form-data"> <tr><td width="10%">Name</td><td><input type="text" name="name"><br></td></tr> <tr><td>Content</td><td><input type="file" name="image"><br></td></tr> <tr><td>Description</td><td><textarea name="description" cols="80" rows="5"></textarea></td></tr> <tr><td colspan="2"><input type="submit" value="Upload image"></td></tr> < /form> < /table>

<p><a href="clearDatabase">Clear database</a>

</body> < /html>

<?php foreach ($images as $image) { ?> < table border="1" cellspacing="0" cellpadding="5"> <tr><td width="10%">Name</td><td><?= $image->getName() ?> </td></tr> <tr><td colspan="2"><img src="data:imageContent?name=<?= $image->getName() ?>" height="100"></td></tr> <tr><td>Description (<?= $image->getDescriptionLength() ?>)</td><td><?= $image->getShortDescription() ?> </td></tr> < /table> < p> <?php } ?>

<p><a href="clearDatabase">Clear database</a>

</body> < /html>

JSP:

<%@ page session="false" %>

 <%@ page import="java.util.List,

                  java.util.Iterator,

                  org.springframework.samples.imagedb.ImageDescriptor" %>

<!– imageList.jsp –>

<html>

 <body>

<%

List images = (List) request.getAttribute("images");

for (Iterator it = images.iterator(); it.hasNext();) {

 ImageDescriptor image = (ImageDescriptor) it.next();

 %>

 <table border="1" cellspacing="0" cellpadding="5">

   <tr><td width="10%">Name</td><td><%= image.getName() %>&nbsp;</td></tr>

         <tr><td colspan="2"><img src="data:imageContent?name=<%= image.getName() %>" height="100"></td></tr>

         <tr><td>Description (<%= image.getDescriptionLength() %>)</td><td><%= image.getShortDescription() %>&nbsp;</td></tr>

 </table>

 <p>

 <%

}

 %>

<p>

 <table border="1" cellspacing="0" cellpadding="5">

 <form action="imageUpload" method="post" encType="multipart/form-data">

   <tr><td width="10%">Name</td><td><input type="text" name="name"><br></td></tr>

   <tr><td>Content</td><td><input type="file" name="image"><br></td></tr>

   <tr><td>Description</td><td><textarea name="description" cols="80" rows="5"></textarea></td></tr>

   <tr><td colspan="2"><input type="submit" value="Upload image"></td></tr>

 </form>

 </table>

<p><a href="clearDatabase">Clear database</a>

</body>

 </html>

PHP：

<html>

 <body>

<?php

foreach ($images as $image) {

?>

 <table border="1" cellspacing="0" cellpadding="5">

   <tr><td width="10%">Name</td><td><?= $image->getName() ?>&nbsp;</td></tr>

         <tr><td colspan="2"><img src="data:imageContent?name=<?= $image->getName() ?>" height="100"></td></tr>

         <tr><td>Description (<?= $image->getDescriptionLength() ?>)</td><td><?= $image->getShortDescription() ?>&nbsp;</td></tr>

 </table>

 <p>

<?php

}

?>

<p>

 <table border="1" cellspacing="0" cellpadding="5">

 <form action="imageUpload" method="post" encType="multipart/form-data">

   <tr><td width="10%">Name</td><td><input type="text" name="name"><br></td></tr>

   <tr><td>Content</td><td><input type="file" name="image"><br></td></tr>

   <tr><td>Description</td><td><textarea name="description" cols="80" rows="5"></textarea></td></tr>

   <tr><td colspan="2"><input type="submit" value="Upload image"></td></tr>

 </form>

 </table>

<p><a href="clearDatabase">Clear database</a>

</body>

 </html>

What I think is interesting between these two is that the PHP, even though it’s calling Java objects, has a simpler syntax. It’s not a major issue, but you can see that PHP is as reasonable as any other view for Java.

Now how do you configure it? Just add the QuercusView class to a UrlBasedViewResolver and give a php suffix and you’re done:

<?xml version="1.0" encoding="UTF-8"?>

 <!–

  - DispatcherServlet application context for the image database.

   –>

 <beans xmlns="http://www.springframework.org/schema/beans"

                 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"

                 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd

                                 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd">

        <!– Activates @Autowired for ImageController –>

         <context:annotation-config/>

        <!– MultiActionController that defines user interface actions as separate methods –>

         <bean id="imageController" class="org.springframework.samples.imagedb.web.ImageController"/>

        <!– MultipartResolver for parsing file uploads, implementation for Commons FileUpload –>

         <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/>

        <bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver">

                 <property name="viewClass" value="com.caucho.spring.quercus.QuercusView"/>

                 <property name="prefix" value="/WEB-INF/views/"/>

                 <property name="suffix" value=".php"/>

         </bean>

 </beans>

If you’re interested in the implementation… The view was pretty easy to connect up once I learned Spring’s view API. It’s essentially a Servlet.service() call with a map of model values. So the QuercusView class above is just a modified QuercusServlet that injects the model values as PHP globals. I’m not sure that that’s right just yet, but it’s a start. The other option would be to put the values as PHP superglobals or in a specialized Spring array.

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