(转)spring与DWR集成的两种方法

jyozq

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>
 
    <!– This should NEVER be present in live –>
 
    <init-param>
 
      <param-name>debug</param-name>
 
      <param-value>true</param-value>
 
    </init-param>
 
    <!– Remove this unless you want to use active function reverse() {
 
[native code]
 
} ajax –>
 
    <init-param>
 
      <param-name>activeReverseAjaxEnabled</param-name>
 
      <param-value>true</param-value>
 
    </init-param>
 
    <!– By default DWR creates application scope objects when they are first
 
    used. This creates them when the app-server is started –>
 
    <init-param>
 
      <param-name>initApplicationScopeCreatorsAtStartup</param-name>
 
      <param-value>true</param-value>
 
    </init-param>
 
    <!– This enables full streaming mode. It’s probably better to leave this
 
    out if you are running across the internet –>
 
    <init-param>
 
      <param-name>maxWaitAfterWrite</param-name>
 
      <param-value>-1</param-value>
 
    </init-param>
 
    <!–
 
    For more information on these parameters, see:
 
    - http://getahead.org/dwr/server/servlet
 
    - http://getahead.org/dwr/function reverse() {
 
[native code]
 
}-ajax/configuration
 
    –>
 
    <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>
 
2)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>
 
    <!– This should NEVER be present in live –>
 
    <init-param>
 
      <param-name>debug</param-name>
 
      <param-value>true</param-value>
 
    </init-param>
 
    <!– Remove this unless you want to use active function reverse() {
 
[native code]
 
} ajax –>
 
    <init-param>
 
      <param-name>activeReverseAjaxEnabled</param-name>
 
      <param-value>true</param-value>
 
    </init-param>
 
    <!– By default DWR creates application scope objects when they are first
 
    used. This creates them when the app-server is started –>
 
    <init-param>
 
      <param-name>initApplicationScopeCreatorsAtStartup</param-name>
 
      <param-value>true</param-value>
 
    </init-param>
 
    <!– This enables full streaming mode. It’s probably better to leave this
 
    out if you are running across the internet –>
 
    <init-param>
 
      <param-name>maxWaitAfterWrite</param-name>
 
      <param-value>-1</param-value>
 
    </init-param>
 
    <!–
 
    For more information on these parameters, see:
 
    - http://getahead.org/dwr/server/servlet
 
    - http://getahead.org/dwr/function reverse() {
 
[native code]
 
}-ajax/configuration
 
    –>
 
    <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>