Spring 整合dwr實例及詳細步驟

時間 2019-11-17

標籤 spring 整合 dwr 實例詳細步驟欄目 Spring 简体版

原文原文鏈接

dwr是屬於Ajax框架的一種技術，其主要原理就是經過配置文件動態的將服務器端的java方法生成javascript方法，使客戶端頁面的js能方便的調用後臺方法來處理數據，減輕服務器的壓力並且實現了頁面的局部刷新功能，下面就來簡單的說一下Spring整合Dwr的步驟：
   想要使用dwr必須須要這幾個文件： dwr.jar , engine.js ,   util.js 這三個文件，這裏沒有上傳本身下載吧。
   第一步：新建web工程，名稱本身起（隨便）配置web.xml文件：
       web.xml文件配置以下：web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<servlet>
<servlet-name>dwr</servlet-name>
<servlet-class>
org.directwebremoting.spring.DwrSpringServlet
</servlet-class>
<init-param>
<description>調試DWR,發佈系統時應將其設爲false</description>
<param-name>debug</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>crossDomainSessionSecurity</param-name>
<param-value>false</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>dwr</servlet-name>
<url-pattern>/dwr/*</url-pattern>
</servlet-mapping>
<!-- <listener>
<listener-class>
org.springframework.web.context.request.RequestContextListener
</listener-class>
</listener> -->
</web-app>

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第二步：創建一個簡單的測試類：test.java

package com.web.utils;
public class Test
{
public void test()
{
System.out.println("測試一下使用dwr框架在前臺頁面調用方法------------------");
}
}

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第三部：添加Spring配置文件： applicationContext .xml

本帖隱藏的內容

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

      
      <bean id="dataSource"
            class="org.springframework.jdbc.datasource.DriverManagerDataSource">
            <property name="driverClassName">
                     <value>com.mysql.jdbc.Driver</value>
            </property>
            <property name="url">
                     <value>
                              jdbc:mysql://127.0.0.1:3306/mydata?useUnicode=true&characterEncoding=utf-8
                     </value>
            </property>
            <property name="username">
                     <value>root</value>
            </property>
            <property name="password">
                     <value>root</value>
            </property>
      </bean>
      
      




      <import resource="applicationContext-dwr.xml" />
</beans>

第四步：dwr的配置文件：applicationContext-dwr.xml：

本帖隱藏的內容

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:dwr="http://www.directwebremoting.org/schema/spring-dwr"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.directwebremoting.org/schema/spring-dwr http://www.directwebremoting.org/schema/spring-dwr-2.0.xsd">
<bean id="Test" class="com.web.utils.Test">
<dwr:remote javascript="DSjavascript">
<dwr:include method="test" />
<dwr:convert type="map" class="java.util.Map"></dwr:convert>
</dwr:remote>
</bean>

</beans>

第五步：創建一個jsp頁面：test.jsp

<%@ page language="java" import="java.util.*" pageEncoding="GBK"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>test.jsp</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<script type='text/javascript' src='/dwr/engine.js'></script>
<script type='text/javascript' src='/dwr/util.js'></script>
<script type='text/javascript' src='/dwr/interface/DSjavascript.js'></script>
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<script type="text/javascript">
DSjavascript.test();
</script>
<body>
簡單測試dwr
</body>
</html>

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頁面使用的時候必定要注意引用dwr提供的js包，就是如下兩個：

<script type='text/javascript' src='/dwr/engine.js'></script>
<script type='text/javascript' src='/dwr/util.js'></script>

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下面這個就是自動生成的javascript方法名，對應java方法：

<script type='text/javascript' src='/dwr/interface/DSjavascript.js'></script>

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使用是直接調用便可：DSjavascript.test();
到此Spring 整合Dwr步驟就結束了，這裏只是作個簡單的配置，可做爲參考，往後使用時可自行深刻配置。

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