让Dwr和Spring-MVC通过Annotation方式共同工作

引用

SPRING2.X后引入了@Controller的方式标注Controller，大大简化了原来的XML方式的MVC配置，不过传统的 DWR配置方式，虽然可以通过SpringCreator的方式将BEAN暴露给AJAX使用，但是仍然逃不出繁杂的XML配置，通过 SPRING的 annotation方式，可以简化 DWR和 SPRING之间的配置. 

web.xml 

<!-- Spring -->
    <servlet>
        <servlet-name>spring</servlet-name>
        <servlet-class>
            org.springframework.web.servlet.DispatcherServlet
        </servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>
                classpath:spring/webControllerContext.xml
            </param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>spring</servlet-name>
        <url-pattern>*.htm</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>spring</servlet-name>
        <url-pattern>/dwr/*</url-pattern>
    </servlet-mapping>

将DispatcherServlet配置成管理htm和 dwr 

webControllerContext.xml 

<?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:aop="http://www.springframework.org/schema/aop"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:jee="http://www.springframework.org/schema/jee"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:dwr="http://www.directwebremoting.org/schema/spring-dwr"
    xmlns:dwra="http://www.directwebremoting.org/schema/spring-dwr-annotations"
    xsi:schemaLocation="
            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
            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.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-2.5.xsd
            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
            http://www.directwebremoting.org/schema/spring-dwr
            http://www.directwebremoting.org/schema/spring-dwr-2.0.xsd
            http://www.directwebremoting.org/schema/spring-dwr-annotations
            http://www.directwebremoting.org/schema/spring-dwr-annotations.xsd">

    <context:annotation-config/>

    <context:component-scan base-package="mvc" />

    <bean
        class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />

    <!--
        <bean
        class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
    -->

    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver"
        p:prefix="" p:suffix=".jsp" />

    <!-- DWR -->
    <dwr:configuration>
        <dwr:convert class="mvc.User" type="bean" />
        <dwr:signatures>
            <![CDATA[
                import java.util.Map;
                ]]>
        </dwr:signatures>
    </dwr:configuration>

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

    <!--  New DWR capabilities-->
    <dwra:url-mapping />
    <dwra:annotation-config />
</beans>

@Controller("helloController")
@RequestMapping("/helloController.htm")
@RemoteProxy(creator = SpringCreator.class, creatorParams = @Param(name = "beanName", value = "helloController"), name = "dwrHelloController")
public class Hello {
    /**
     * User Dao
     */
    private UserDao userDao;

    /**
     * Employee dao
     */
    private EmployeeDao employeeDao;

    @RemoteMethod
    @RequestMapping
    public String sayHello() {
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