Spring 2.5 & Dwr 2.0 配置文档

最新推荐文章于 2018-04-01 21:59:35 发布

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最新推荐文章于 2018-04-01 21:59:35 发布

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分类专栏： Java_web 文章标签： dwr spring bean callback encoding function

本文链接：https://blog.youkuaiyun.com/WalkingWithJava/article/details/2698323

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本文介绍了如何在项目中集成Direct Web Remoting (DWR)，包括Web.xml配置、Bean配置及JSP页面调用方法。通过示例展示了如何设置DWR以实现客户端与服务器间的远程交互，并提供了验证功能的具体实现。

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1 Web.xml 配置

    < servlet >
         < servlet-name > dwr-invoker </ servlet-name >
         < servlet-class >
            org.directwebremoting.spring.DwrSpringServlet
         </ servlet-class >
         < init-param >
             < param-name > debug </ param-name >
             < param-value > true </ param-value >
         </ init-param >
         < load-on-startup > 3 </ load-on-startup >
     </ servlet >

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

这里有个小技巧.查看Dwr源码,在DwrSpringServlet中它会查找Spring的WebApplicationContext,如下:

WebApplicationContext webappContext = WebApplicationContextUtils.getRequiredWebApplicationContext(servletContext);

container = new SpringContainer();
container.setBeanFactory(webappContext);
ContainerUtil.setupDefaults(container, servletConfig);
ContainerUtil.setupFromServletConfig(container, servletConfig);

所以,你必须在Web.xml中加上Spring的ContextLinstener才能正常使用Dwr:

<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>
        <servlet-class>
            org.directwebremoting.spring.DwrSpringServlet
        </servlet-class>
        <init-param>
            <param-name>debug</param-name>
            <param-value>true</param-value>
        </init-param>
        <load-on-startup>3</load-on-startup>
</servlet>

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

2 Bean 配置文件写法

<?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:dwr="http://www.directwebremoting.org/schema/spring-dwr"
    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">

    

    <dwr:configuration>
        <dwr:convert
            class="ww.support.web.dwr.validate.FieldValidateInfo" type="bean">
        </dwr:convert>
    </dwr:configuration>

    <bean id="genericValidatorDwr"
        class="ww.support.web.dwr.validate.GenericValidator">
        <dwr:remote javascript="genericValidatorDwr">
            <dwr:include method="isEmpty" />
            <dwr:include method="isNotNumeric" />
            <dwr:include method="isNumberNotInRange" />
            <dwr:include method="isNumberGreaterThan" />
        </dwr:remote>
    </bean>

    </beans>

3 jsp的调用