Liferay研究之二：引入Spring

lyn1984

Liferay研究之二：引入Spring 收藏

首先Suppose你已经搭建好了ext环境。

1、在Ext/ext-web/docroot/WEB-INF/web.xml中引入spring

<display-name>Spring Portal</display-name>

<description>Spring Portlet sample application</description>

<!--

- Location of the XML file that defines the root application context.

- Applied by ContextLoaderServlet.

-->

<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>/WEB-INF/context/applicationContext.xml</param-value>

</context-param>

<listener>

<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

</listener>

<servlet>

<servlet-name>view-servlet</servlet-name>

<servlet-class>org.springframework.web.servlet.ViewRendererServlet</servlet-class>

<load-on-startup>1</load-on-startup>

</servlet>

<servlet-mapping>

<servlet-name>view-servlet</servlet-name>

<url-pattern>/WEB-INF/servlet/view</url-pattern>

</servlet-mapping>

2、在/WEB-INF/下建立一个目录（当然也可以不建）context，并在其下建立一个文件applicationContext.xml，配置spring的缺省行为，如下所示：

<!-- Default View Resolver -->

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

<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>

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

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

</bean>

<!-- This interceptor forwards the mapping request parameter from an ActionRequest to be used as a render parameter. -->

<bean id="parameterMappingInterceptor" class="org.springframework.web.portlet.handler.ParameterMappingInterceptor"/>

<!-- Abstract Default ExceptionHandler -->

<bean id="defaultExceptionHandlerTemplate" class="org.springframework.web.portlet.handler.SimpleMappingExceptionResolver" abstract="true">

<property name="defaultErrorView" value="error"/>

<property name="exceptionMappings">

<props>

<prop key="javax.portlet.PortletSecurityException">unauthorized</prop>

<prop key="javax.portlet.UnavailableException">unavailable</prop>

</props>

</property>

</bean>

3、编写一个Spring Portlet。 在ext-impl/新建一个Class,目录自选，命名为HelloWorldPortlet, 该类继承于GenericPortlet。

public class HelloWorldPortlet extends GenericPortlet ...{

public void doView(RenderRequest request, RenderResponse response)

throws PortletException, IOException ...{

System.out.println("Entering HelloWorldPortlet.doView");

response.setContentType("text/html");

PrintWriter out = response.getWriter();

out.println("<h1>Hello World</h1>");

out.println("<p>This portlet demonstrates how to delegate to "+

"an existing JSR-168 portlet via a HandlerAdapter</p>");

out.println("<p>Portlet Name: " + this.getPortletName() + "</p>");

out.println("<p>Init Parameters:</p><ul>");

for (Enumeration e = this.getInitParameterNames(); e.hasMoreElements();) ...{

String name = (String)e.nextElement();

out.println("<li>" + name + " = " + this.getInitParameter(name) + "</li>");

}

out.println("</ul>");

}

}

4、编写HelloWorldPortlet对应的Spring bean配置。在context目录下建立一个helloworld.xml，并配置其内容如下：

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

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">

<beans>

<bean id="helloWorldPortlet" class="org.springframework.web.portlet.mvc.PortletWrappingController">

<property name="portletClass">

<value>com.ext.portlet.helloworld.HelloWorldPortlet</value>

</property>

<property name="useSharedPortletConfig">

<value>false</value>

</property>

<property name="portletName">

<value>wrapped-hello-world</value>

</property>

<property name="initParameters">

<props>

<prop key="HarryPotter">The magic property</prop>

<prop key="JerrySeinfeld">The funny property</prop>

</props>

</property>

</bean>

<!-- Handler Mapping -->

<bean id="portletModeHandlerMapping" class="org.springframework.web.portlet.handler.PortletModeHandlerMapping">

<property name="portletModeMap">

<map>

<entry key="view"><ref bean="helloWorldPortlet"/></entry>

</map>

</property>

</bean>

<!-- Exceptions Handler -->

<bean id="defaultExceptionHandler" parent="defaultExceptionHandlerTemplate"/>

</beans>

注意，此处需要配置一个缺省的handler.

5、至此，一个Spring Portlet就开发好了，剩下的，就是需要将其配置成为一个Liferay的Portlet,具体步骤如下：

6、先在portlet-ext.xml中定义Portlet:

<portlet>

<portlet-name>helloworld</portlet-name>

<portlet-class>org.springframework.web.portlet.DispatcherPortlet</portlet-class>

<init-param>

<name>contextConfigLocation</name>

<value>/WEB-INF/context/helloworld.xml</value>

</init-param>

<supports>

<mime-type>text/html</mime-type>

<portlet-mode>view</portlet-mode>

</supports>

<portlet-info>

<title>Hello World</title>

</portlet-info>

</portlet>

注意，上面加粗部分显示了liferay如何将spring bean定义配置文件导入的。有一些文章介绍需要在portal-ext.properties中配置，可能是版本升级了，在我测试过程中，没有用那种方式。

7、然后在将其定义给Liferay，在liferay-portlet-ext.xml中定义：

<portlet>

<portlet-name>helloworld</portlet-name>

</portlet>

8、将其显示到Add Content列表中。 在liferay-display.xml中定义：

<category name="category.sample">

<portlet id="helloworld" />

</category>

至此，Spring Portlet开发完成。最后，还需要将spring-portlet.jar拷贝到classpath中。OK， ant deploy→login→add content→sample.helloworld。

打完，收工!

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/smilingleo/archive/2007/10/31/1859922.aspx