<servlet>
  <servlet-name>dwr-invoker</servlet-name>
  <servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class>
</servlet>
<servlet-mapping>
  <servlet-name>dwr-invoker</servlet-name>
  <url-pattern>/dwr/*</url-pattern>
</servlet-mapping>

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

 <init-param>
 <param-name>logLevel</param-name>
 <param-value>DEBUG</param-value>
</init-param>

 <servlet>
    <servlet-name>dwr-invoker</servlet-name>
    <servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class>
    <init-param>
      <param-name>config-1</param-name>
      <param-value>WEB-INF/dwr1.xml</param-value>
    </init-param>
    <init-param>
      <param-name>config-2</param-name>
      <param-value>WEB-INF/dwr2.xml</param-value>
    </init-param>
</servlet>

 <servlet>
   <servlet-name>dwr-invoker</servlet-name>
    <servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class>
<!--用classes/dwr.xml-->
</servlet>
<servlet>
   <servlet-name>dwr-invoker1</servlet-name>
   <servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class>
   <init-param>
     <param-name>config-admin</param-name>
     <param-value>WEB-INF/dwr1.xml</param-value>
   </init-param>
   <init-param>
     <param-name>debug</param-name>
     <param-value>true</param-value>
   </init-param>
</servlet>
<servlet-mapping>
   <servlet-name>dwr-invoker</servlet-name>
   <url-pattern>/dwr/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
   <servlet-name>dwr-invoker1</servlet-name>
   <url-pattern>/dwr1/*</url-pattern>
</servlet-mapping>

1、java的方法避免用 java 和 javascript的關(guān)鍵字。 如 try()方法 或 delete()方法。 
2、在你的java類中不要出現(xiàn)重載 avoid overloaded methods. 
3、在生產(chǎn)環(huán)境下，你可以把deprecated.js engine.js util.js 合并成一個(gè)，并放到web容器內(nèi)，直接在htm,jsp中引用。 （對(duì)于java代碼轉(zhuǎn)換成的javascript代碼也可以這么做，免得每次生成javascript代碼浪費(fèi)時(shí)間） 
4、研究一下Bean Converters。POJOjava對(duì)象必須嚴(yán)格按照 getProperty() setProperty()定義。Bean Converters是按照 java對(duì)象的 get set方法工作的。DWR1.1加了Object Converters,是按private int property;這類屬性工作的。 
<convert converter="bean" match="example.Fred"/> 
<param name="exclude" value="property1, property2"/> 
</convert> 
當(dāng)你這樣配置時(shí)，java對(duì)象轉(zhuǎn)化成的javascript對(duì)象不包括property1和property2。 
<convert converter="bean" match="example.Fred"/> 
<param name="include" value="property1, property2"/> 
</convert> 
反過(guò)來(lái)java對(duì)象轉(zhuǎn)化成的javascript對(duì)象直包括property1和property2。 
5、<convert converter="collection" match="java.util.Collection"/> 
<convert converter="map" match="java.util.Map"/> 
這也是容易出問(wèn)題的地方. 
如 
package example; 
public class Person{ 
private String name; 
get ... set 
private List relationPerson; 
public List setRelationPerson(List relationPerson){ 
this.relationPerson=relationPerson; 
} 
} <convert converter="bean" match="example.Person"/> 
</convert> 
<signatures> 
<![CDATA[ 
import java.util.Set; 
import example.Person;
Person.setRelationPerson(List<Person>); 
]]> 
</signatures>
在jdk1.5泛型中有寫法區(qū)別
6、另外在Set,List等做為方法參數(shù)時(shí)也會(huì)出現(xiàn)混淆。返回集合類型不會(huì)出現(xiàn)問(wèn)題，想想就知道了。 
如 在Test類中有 public Set testBeanSetParam(Set test) 這個(gè)方法，客戶端得到的javascript方法可能是Test.testBeanSetParam(p0,callback);當(dāng)我們javascript調(diào)用這個(gè)方法時(shí)，鬼才知道怎么確定p0的類型,也不可能知道Set集合中該放什么類型的java對(duì)象，所以dwr的 special signatures syntax 確定這些集合和內(nèi)容的類型 
<signatures> 
<![CDATA[ 
import java.util.Set; 
import example.Test;
Test.testBeanSetParam(Set<TestBean>); 
<!--Test.stringStringMapParam(Map<String, String>);--> 
]]> 
</signatures> 
7、Creators 
<allow> 
<create creator="..." javascript="..." scope="..."> 
<param name="..." value="..."/> 
<auth method="..." role="..."/> 
<exclude method="..."/> 
<include method="..."/> 
</create> 
... 
</allow> 
為了更少的暴露業(yè)務(wù)方法，最好配置include屬性。 
dwr支持new ,script,struts....幾種集成方法，也支持static方法的調(diào)用，我覺得最好的是spring,其他感覺是處理遺留問(wèn)題處理。 
8、engine_js 作為dwr框架客戶端核心，主要完成xmlHttp或iframe的構(gòu)造，我們沒必要關(guān)心它如何實(shí)現(xiàn)。有幾點(diǎn)創(chuàng)新的我們可以學(xué)習(xí)下。 
Call Batching 我們可以把幾個(gè)客戶端請(qǐng)求一起放送到服務(wù)器端，減少了網(wǎng)絡(luò)交互，但要注意依存關(guān)系和他們處理的順序。 
Call Ordering 同步異步調(diào)整。一般用默認(rèn)的就好了。注意依存關(guān)系。 
Remoting Hooks 鉤子，"small AOP" 
依存關(guān)系解釋。 如果 request1() request2()兩個(gè)業(yè)務(wù)邏輯方法，request2方法需要用到request1方法從服務(wù)器端返回的結(jié)果。如果調(diào)用request2時(shí)，request1還沒處理或還沒請(qǐng)求。 下拉框連動(dòng)可能有這個(gè)問(wèn)題。 
9、util.js propotype.js有些重復(fù)，這讓我很難受。只能改代碼了，可別壞了開元協(xié)議。 
10、如果你的回調(diào)方法想加其他參數(shù) 
var dataFromBrowser = ...; 
var callbackProxy = function(dataFromServer) { 
callbackFunc(dataFromServer, dataFromBrowser); 
}; 
var callMetaData = { callback:callbackProxy }; 
Remote.method(params, callMetaData); 
11、dwr1.1 
1.1只能算一個(gè)bug消除版本，沒有什么大的功能調(diào)整。源代碼結(jié)構(gòu)做了些調(diào)整。2.0有新的特征加入。
It has a far broader scope; the major new features are accessibility enhancements, and what now appears to
 be called ‘Comet‘. 在文檔中提到了“Comet”，估計(jì)與DWR2.0作者想法類似。

Getahead
[ DWR | DocTree | Blog ] 
    
Home ? DWR
Chinese
Yenwen Feng spoke at JavaTwo in Taiwan in Chinese. He has provided his Powerpoint slides and the 
examples that go with them as downloads:
    
Powerpoint presentation [.ppt] [.rar]    
Mini-site created from presentation    
Examples archive [.rar] 
Fran?ais / French
 
Julien Dubois vient d‘écrire un livre en Fran?ais sur Spring, lequel inclut un chapitre sur DWR.
 La bonne nouvelle est que ce chapitre fait partie de ceux téléchargeables gratuitement. 
Téléchargez le PDF. Spring par la pratique est disponible maintenant.
Laurent Bois a écrit un article intitulé des "DWR sait rendre Ajax simple". Il commence 
"Aujourd’hui les technologies de base fournies par les navigateurs web, c’est à dire afficher
 le contenu de documents, ont été poussées jusqu’aux limites."
Julien Dubois has recently written a French book primarily about Spring - it includes a section
 on DWR. The great news is that this chapter is one of the free download chapters. 
Get the PDF. Spring par la Practique is available now.
Laurent Bois has written an article entitled "DWR makes Ajax simple". It begins: "Today the 
basic technologies provided by web browsers were pushed until the limits".
Italiano / Italian
Federico Paparoni ha tradotto la lezione privata di Java.net in Italiano. è disponibile qui:
 "Sviluppare Applicazioni AJAX in Java".
Federico Paparoni translated the Java.net tutorial into Italian. It is available here: 
"Sviluppare Applicazioni AJAX in Java".
Português / Portuguese
Pedro Pimentel escreveu um tutorial PDF em português de como iniciar no DWR. Come?a assim: 
"Este tutorial assume que você tenha um conhecimento básico de aplica??es web em java. Entretanto,
 conhecimento em C garante um bom entendimento dos códigos".
Pedro Pimentel has written a PDF tutorial on how to get started with DWR in Portuguese. It begins: 
"This tutorial assumes you have basic knowledge of web applications in Java. However some ‘C‘ 
knowledge will get you started."
? Supportup
Non-English Documentation submitted by joe on 22 Aug 2006 - 19:41