配置整合DWR3.0和Spring2.5使用annotation注解

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DWR Spring Web Servlet XML

配置整合DWR3.0和Spring2.5使用annotation注解

这里使用 DWR3.rc1, Spring2.5 and Spring MVC

在Spring2.5中，使用了许多annotation, 新版本的DWR也支持annotation了, 下面看一下配置过程

1. 先写一个Controller

Java代码复制代码

   1. package com.myapp.web.controller;
   2.
   3. import javax.servlet.http.HttpServletRequest;
   4. import org.directwebremoting.annotations.RemoteMethod;
   5. import org.directwebremoting.annotations.RemoteProxy;
   6. import org.springframework.stereotype.Controller;
   7. import org.springframework.web.bind.annotation.RequestMapping;
   8.
   9. @Controller
10. @RemoteProxy
11. public class UserController {
12.
13.     @RemoteMethod
14.     public String getUserName(int id) {
15.         System.out.println("user id is " + id);
16.         return "UserName: " + id;
17.     }
18.
19.     @RequestMapping("/user/add.do")
20.     public String addUser(HttpServletRequest request) {
21.         System.out.println("this is action method");
22.         return "/user/list.jsp";
23.     }
24. }

package com.myapp.web.controller;

import javax.servlet.http.HttpServletRequest;
import org.directwebremoting.annotations.RemoteMethod;
import org.directwebremoting.annotations.RemoteProxy;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RemoteProxy
public class UserController {

        @RemoteMethod
        public String getUserName(int id) {
                System.out.println("user id is " + id);
                return "UserName: " + id;
        }

        @RequestMapping("/user/add.do")
        public String addUser(HttpServletRequest request) {
                System.out.println("this is action method");
                return "/user/list.jsp";
        }
}

@RemoteProxy注解告诉DWR，这个Class是我们想暴露出来的。@RemoteMethod注解告诉DWR去暴露这个指定的方法，只有加了RemoteMethod注解的方法会被暴露，其它的不会。

这里也可以使用@RemoteProxy(name="userRemote")的方式指定DWR接口的名字

2. 接下来看web.xml的配置

Xml代码复制代码

   1. <servlet>
   2.     <servlet-name>action</servlet-name>
   3.     <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
   4.     <load-on-startup>1</load-on-startup>
   5.    </servlet>
   6.
   7. <context-param>
   8.     <param-name>contextConfigLocation</param-name>
   9.     <param-value>/WEB-INF/springconfig/*.xml</param-value>
10. </context-param>
11.
12.    <servlet-mapping>
13.     <servlet-name>action</servlet-name>
14.     <url-pattern>*.do</url-pattern>
15.    </servlet-mapping>
16.
17. <servlet-mapping>
18.     <servlet-name>action</servlet-name>
19.     <url-pattern>/dwr/*</url-pattern>
20. </servlet-mapping>
21.
22. <listener>
23.     <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
24. </listener>

       <servlet>
                <servlet-name>action</servlet-name>
                <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
                <load-on-startup>1</load-on-startup>
    </servlet>

        <context-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>/WEB-INF/springconfig/*.xml</param-value>
        </context-param>

    <servlet-mapping>
                <servlet-name>action</servlet-name>
                <url-pattern>*.do</url-pattern>
    </servlet-mapping>

        <servlet-mapping>
                <servlet-name>action</servlet-name>
                <url-pattern>/dwr/*</url-pattern>
        </servlet-mapping>

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

注意，这里没有使用org.directwebremoting.spring.DwrSpringServlet或org.directwebremoting.servlet.DwrServlet，并且请注意这里使用spring的dispatcher servlet来映射/dwr/*请求。

3. 最后看针对DispatcherServlet的配置文件action-servlet.xml

Xml代码复制代码

   1. <beans xmlns="http://www.springframework.org/schema/beans"
   2.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   3.     xmlns:dwr="http://www.directwebremoting.org/schema/spring-dwr"
   4.     xmlns:context="http://www.springframework.org/schema/context"
   5.     xsi:schemaLocation="http://www.springframework.org/schema/beans
   6.         http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
   7.         http://www.springframework.org/schema/context
   8.         http://www.springframework.org/schema/context/spring-context-2.5.xsd
   9.         http://www.directwebremoting.org/schema/spring-dwr
10.         http://www.directwebremoting.org/schema/spring-dwr-3.0.xsd"
11.         default-autowire="byName">
12.
13.     <context:annotation-config />
14.
15.     
16.     <dwr:configuration />
17.     <dwr:annotation-config />
18.     <dwr:url-mapping />
19.
20.     
21.     <dwr:controller id="dwrController" debug="true" />
22.
23.     
24.     <context:component-scan base-package="com.myapp.web.controller" />
25.
26.     
27.     <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
28.         <property name="order" value="1" />
29.     </bean>
30.     <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping">
31.         <property name="order" value="2" />
32.     </bean>
33.
34. </beans>

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    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-2.5.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-2.5.xsd
        http://www.directwebremoting.org/schema/spring-dwr
        http://www.directwebremoting.org/schema/spring-dwr-3.0.xsd"
        default->

        <context:annotation-config />

        
        <dwr:configuration />
        <dwr:annotation-config />
        <dwr:url-mapping />

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

        
        <context:component-scan base-package="com.myapp.web.controller" />

        
        <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
                <property name="order" value="1" />
        </bean>
        <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping">
                <property name="order" value="2" />
        </bean>

</beans>

简单解释一下这些配置

    * <dwr:annotation-config /> 要求DWR在Spring容器中检查拥有@RemoteProxy 和 @RemoteMethod注解的类。注意它不会去检查Spring容器之外的类。
    * <dwr:url-mapping /> 要求DWR将util.js和engine.js映射到dwrController
    * <dwr:controller id="dwrController" debug="true" /> 定义dwrController
    * <dwr:configuration /> 此标签在这个例子中不是必须的，如果你想配置Spring容器之外的类，就需要它了。

最后一件事，DWR的测试页面 http://localhost:8080/myapp/dwr 在这里不好用。

请使用 http://localhost:8080/myapp/dwr/test/YOUR-BEAN-NAME 的方式来测试你的DWR接口，

例如这里使用 http://localhost:8080/myapp/dwr/test/UserController

OK 运行测试一下吧

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