DWR入门（一）基本配置-优快云博客

本文链接：https://blog.youkuaiyun.com/alleni123/article/details/84508744

1.首先参考[url]http://alleni123.iteye.com/admin/blogs/1983774[/url]，把web环境搭建起来。

2.在pom.xml加入以下依赖：

	<dependency>
			<groupId>commons-logging</groupId>
			<artifactId>commons-logging</artifactId>
			<version>1.1.3</version>
		</dependency>

		<dependency>
			<groupId>commons-io</groupId>
			<artifactId>commons-io</artifactId>
			<version>2.4</version>
		</dependency>		

			<dependency>
			<groupId>org.directwebremoting</groupId>
			<artifactId>dwr</artifactId>
			<version>3.0.M1</version>
		</dependency>

3. 在web.xml中配置：

<servlet>
		<servlet-name>dwr-invoker</servlet-name>
		<servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>

		<init-param>
			<param-name>debug</param-name>
			<param-value>true</param-value>
		</init-param>

		<load-on-startup>1</load-on-startup>
	</servlet>


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

4. 在WEB-INF目录中创建dwr.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dwr PUBLIC
    "-//GetAhead Limited//DTD Direct Web Remoting 3.0//EN"
    "http://directwebremoting.org/schema/dwr30.dtd">

<dwr>

  <allow>
        <!--create表示将一个Java对象公布为一个js对象,
         这样就会自动创建一个HelloDwr.js-->
  	<create creator="new"> 
               <!--可以加入javascript="hello",这样生成js对象名就是hello.js-->
  		<param name="class" value="dwr.HelloDwr"/>
  	</create>


  </allow>

</dwr>

5. 创建dwr包下的类HelloDwr.java

package dwr;

public class HelloDwr {


	public String say(String name){
		System.out.println("name :" +name);
		return "hello"+name;
	}
}

6. 创建dwr01.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
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>
    <base href="<%=basePath%>">

    <title>My JSP 'dwr01.jsp' starting page</title>
    <!-- 必须引入dwr的engine.js -->
	 <script type="text/javascript" src="<%=path%>/dwr/engine.js"></script>

	 <!-- 将java的类引入 -->
	 <script type="text/javascript" src="<%=path%>/dwr/interface/HelloDwr.js"></script>

	 <script type="text/javascript">
	 	HelloDwr.say("Hello");
	 </script>

  </head>

  <body>
    This is my JSP page. <br>
  </body>
</html>