spring与DWR集成的两种方法-优快云博客

本文详细介绍了DWR框架的两种配置方式：一种是将DWR与Spring配置整合在一个文件中，另一种则是将两者完全分开配置。文章还提供了具体的XML配置示例，帮助开发者更好地理解和应用DWR。

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1。第一种：

在这种方式中，不需要dwr.xml文件，将这部分配置与Spring的配置写在同一个文件中。DWR使用的servlet为：org.directwebremoting.spring.DwrSpringServlet，这样，只需要两个配置文件就可以了，分别是：

web.xml

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

<!DOCTYPE web-app PUBLIC

    "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"

    "http://java.sun.com/dtd/web-app_2_3.dtd"> 

<web-app id="simplelife.cn">

  <context-param>

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

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

  </context-param>

  <listener>

    <listener-class>

      org.springframework.web.context.ContextLoaderListener

    </listener-class>

  </listener>

  <servlet>
  <servlet-name>dwr-invoker</servlet-name>
  <display-name>DWR Servlet</display-name>
  <description>Direct Web Remoter Servlet</description>
    <servlet-class>org.directwebremoting.spring.DwrSpringServlet</servlet-class>
    <init-param>
     <param-name>debug</param-name>
   <param-value>true</param-value>
    </init-param>
  <init-param>
    <param-name>activeReverseAjaxEnabled</param-name>
    <param-value>true</param-value>
   </init-param>
   <init-param>
     <param-name>initApplicationScopeCreatorsAtStartup</param-name>
      <param-value>true</param-value>
    </init-param>
    <init-param>
      <param-name>maxWaitAfterWrite</param-name>
      <param-value>-1</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dwr-invoker</servlet-name>
    <url-pattern>/dwr/*</url-pattern>
  </servlet-mapping>
</web-app>

在applicationContext.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:dwr="http://www.directwebremoting.org/schema/spring-dwr"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                           http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
                           http://www.directwebremoting.org/schema/spring-dwr
                           http://www.directwebremoting.org/schema/spring-dwr-2.0.xsd
                           http://www.springframework.org/schema/context
                           http://www.springframework.org/schema/context/spring-context-2.5.xsd"> 

  <bean id="dwrJavaDate" class="java.util.Date">
    <dwr:remote javascript="javaDate">
    </dwr:remote>
  </bean>

  <dwr:configuration></dwr:configuration>
  <dwr:controller id="dwrController" debug="true" />
</beans>

2.第二种

第二种配置方式
使用第一种方式的Spring配置文件看起来比较乱，不那么干净，在这种方式中，将Spring的配置与DWR的配置完全分开，看起来干净利落。DWR使用的servlet为：org.directwebremoting.servlet.DwrServlet ，这样就需要三个配置文件了：

web.xml文件：

<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app PUBLIC

    "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"

    "http://java.sun.com/dtd/web-app_2_3.dtd"> 

<web-app id="simplelife.cn">

  <context-param>

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

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

  </context-param>

 <listener>

     <listener-class>

         org.springframework.web.context.ContextLoaderListener

     </listener-class>

 </listener>

  <servlet>

    <servlet-name>dwr-invoker</servlet-name>

    <display-name>DWR Servlet</display-name>

    <description>Direct Web Remoter Servlet</description>

    <servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>
    <init-param>
      <param-name>debug</param-name>
      <param-value>true</param-value>
    </init-param>
    <init-param>
      <param-name>activeReverseAjaxEnabled</param-name>
    <param-value>true</param-value>
  </init-param>
    <init-param>
      <param-name>initApplicationScopeCreatorsAtStartup</param-name>
     <param-value>true</param-value>
    </init-param>
    <init-param>
     <param-name>maxWaitAfterWrite</param-name>
      <param-value>-1</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dwr-invoker</servlet-name>
    <url-pattern>/dwr/*</url-pattern>
  </servlet-mapping>
</web-app>

applicationContext.xml文件，这是一个纯粹的Spring配置文件：

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

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

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

       xmlns:p="http://www.springframework.org/schema/p"

       xmlns:context="http://www.springframework.org/schema/context"

       xsi:schemaLocation="http://www.springframework.org/schema/beans

                           http://www.springframework.org/schema/beans/spring-beans-2.0.xsd

                           http://www.springframework.org/schema/context

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

  

  <bean id="dwrJavaDate" class="java.util.Date">

  </bean>

</beans>

最后一个文件是dwr.xml，在这个文件中，使用spring容器中的对象：

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

<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN" 

  "http://getahead.org/dwr/dwr20.dtd">

<dwr>

  <allow>

    <create creator="spring" javascript="javaDate">

      <param name="beanName" value="dwrJavaDate"/>

    </create>

  </allow>

</dwr>