Document root element "dwr", must match DOCTYPE root "null".Document is invalid:

今天初用DWR是报了两个错误
严重: Line=5 Document root element "dwr", must match DOCTYPE root "null".
严重: Line=5 Document is invalid: no grammar found.
后来在网上找了一下，只要在dwr.xml中加一小段代码就可以了
下面是我的测试代码了：

public class FirstDWR {
	
	public String sayHello(String userName){
		return userName+"您好！服务器的时间是："+System.currentTimeMillis();
	}

}

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
	http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

	<!-- dwr 中servlet的配制 -->
	<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>
	</servlet>

	<!-- dwr中servlet的映射 -->
	<servlet-mapping>
		<servlet-name>dwr-invoker</servlet-name>
        <url-pattern>/dwr/*</url-pattern>
	</servlet-mapping>

	
</web-app>

<?xml version="1.0" encoding="UTF-8"?>
<!-- 加上这一段就不会报错 -->
<!--  <!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN" "http://getahead.org/dwr/dwr20.dtd">-->
<!-- 加上这一段就不会报错 -->
<dwr>
	<allow>
		<create creator="new" javascript="FirstDWR">
			<param name="class" value="cn.netjava.dwr.FirstDWR" />
		</create>
	</allow>
</dwr>

评论

2 楼 zongshoujin 2012-07-16  

恩！确实是这样的！顶！

1 楼 styelring 2011-08-27  

<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN" "http://getahead.org/dwr/dwr20.dtd">
在dwr.xml中加上这句后确实没报错了