DWR与Struts整合2007-08-07 【收藏】

1.下載DWR Version 2
https://dwr.dev.java.net/files/documents/2427/47504/dwr.jar

2.安裝DWR,把dwr.jar放到WEB-INF/lib下

web.xml中加入DWRServlet & ActionServlet
其中<load-on-startup>的部分要特別注意,ActionServlet要先初始化,所以數字要比較小.

  <servlet>

<servlet-name>action</servlet-name>

<servlet-class>org.apache.struts.action.ActionServlet

</servlet-class>

<init-param>

<param-name>config</param-name>

<param-value>/WEB-INF/struts-config.xml</param-value>

</init-param>

<init-param>

<param-name>debug</param-name>

<param-value>2</param-value>

</init-param>

<load-on-startup>2</load-on-startup>

</servlet>

<servlet-mapping>

<servlet-name>action</servlet-name>

<url-pattern>*.do</url-pattern>

</servlet-mapping>

<servlet>

<servlet-name>dwr-invoker</servlet-name>

<servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class>

<init-param>

<param-name>debug</param-name>

<param-value>true</param-value>

</init-param>

<load-on-startup>10</load-on-startup>

</servlet>

<servlet-mapping>

 <servlet-name>dwr-invoker</servlet-name>

<url-pattern>/dwr/*</url-pattern>

</servlet-mapping>

dwr.xml中加入struts的設定,其中formBean的參數的value值,會對應到struts-config.xml中<form-beans>的設定

<dwr> 
<allow>    
<create creator="struts" javascript="testFrm">      
<param name="formBean" value="testActionForm"/>    
</create>  
</allow>  
</dwr>  




struts-config.xml 
 
<struts-config>  
<form-beans>    
<form-bean name="testActionForm" type="test.struts.testActionForm" />  
</form-beans>  
<action-mappings>    
<action name="testActionForm" path="/testAction" scope="session" type="test.struts.testAction" validate="false">      
<forward name="display" path="/display.jsp" />    
</action>  
</action-mappings>  
<message-resources parameter="ApplicationResources" />
</struts-config>




testActionForm.java,getDate()會透過dwr,取得現在最新的日期 
 
package test.struts; 
import org.apache.struts.action.*;
import java.util.*; 
public class testActionForm extends ActionForm {     
private String strDate;     
public void setStrDate(String strDate) {        
this.strDate = strDate;    
}     
public String getStrDate() {        
return strDate;    
}    
 //dwr    public String getDate() {        
Date date = new Date();        
return date.toString();   
 } 
}





testAction.java

package test.struts; 
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForm;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.Action;
import org.apache.struts.action.*; 
public class testAction extends Action {    
	public ActionForward execute(ActionMapping mapping, ActionForm form,                                 
HttpServletRequest request,                                 
HttpServletResponse response) {         
testActionForm actionForm = (testActionForm) form;       
 System.out.println(actionForm.getStrDate());        
return mapping.findForward("display");    
}
}



date.jsp,在form的部分,請用struts 的 tag library,我把<html:text property="strDate" size="30" >改成<input type="text" name="strDate">後,無法正常的接受到值.

<%@ page contentType="text/html; charset=Big5" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
<html><head>
<title>title</title>  
<script type='text/javascript' src='dwr/interface/testFrm.js'></script>  
<script type='text/javascript' src='dwr/engine.js'></script>  
<script type='text/javascript' src='dwr/util.js'></script>
</head>
<SCRIPT LANGUAGE="JavaScript" type=""> 
function refreshDate() {   
 testFrm.getDate(populateDate)
;} 
function populateDate(data){   
DWRUtil.setValue('strDate', data);
} 
</script> 
<body> 
<html:form action="testAction.do">
date：<html:text property="strDate" size="30" ></html:text> 
<input type="button" onclick="refreshDate();" value="更新日期"/><br/>   
<html:submit>送出  </html:submit>
</html:form></body></html>





display.jsp

<%@ page contentType="text/html; charset=Big5" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
%@page import="test.struts.*"%
<html>
<head>
<title>test</title>
</head><body bgcolor="#ffffff"><h1>您送出的日期:<br>
<bean:write name="testActionForm" property="strDate"/></h1>
</body>
</html>

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posted on 2008-08-03 15:34 weesun一米阳光阅读(421) 评论(0) 编辑收藏所属分类: Struts 、 AJAX 、总结备用

DWR与Struts整合2007-08-07 【收藏】

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