DWR配置

今日用到了DWR让我折腾了一会，最终搞定，先记住，方便下次不用麻烦！

1，添加Dwr.jar

2，配置web.xml（请自行添加ContextLoaderListener监听器，否则bean无法获取！），

     

<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>
   <init-param>        
            <param-name>crossDomainSessionSecurity</param-name>        
            <param-value>false</param-value>        
    </init-param> 
  </servlet>
  <servlet-mapping>
   <servlet-name>dwr-invoker</servlet-name>
   <url-pattern>/dwr/*</url-pattern>
  </servlet-mapping>

 

3，配置dwr.xml（将此文件添加到WEB-INFO目录下,此配置方法很多，详参考相关文档）

    

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN" "http://getahead.org/dwr/dwr20.dtd">
<dwr>
  <allow>
    <create creator="spring" javascript="aclManager" scope="application">
      <param name="beanName" value="aclManager"/>
    </create>
    
    <convert converter="bean" match="com.panlong.service.impl.AclManagerImpl" />
  </allow>
</dwr>

 

4，要使用时请先在调用页面引入文件如下：

    

<script type="text/javascript" src="<%=request.getContextPath() %>/dwr/engine.js"></script>
<script type="text/javascript" src="<%=request.getContextPath() %>/dwr/util.js"></script>
<script type="text/javascript" src="<%=request.getContextPath() %>/dwr/interface/aclManager.js"></script>

5，使用例子。

    

<script type="text/javascript">
//授权
function addOrUpdatePermission(field){
	dwr.engine.setAsync(false);
	
	//如果被选择上，则同时选择其"不继承"和"启用"checkbox
	if(field.checked){
		$(field.moduleId+"_USE").checked = true;
		<c:if test="${aclInfo.principalType eq 'User' }">
		$(field.moduleId+"_EXT").checked = true;
		addOrUpdateExtends(field);
		</c:if>
	}

	aclManager.addOrUpdatePermission(
		"${aclInfo.principalType}",
		${aclInfo.principalId},
		field.moduleId,
		field.permission,
		field.checked
	);
}

//设置用户的继承特性
function addOrUpdateExtends(field){
	aclManager.addOrUpdateUserExtends(
		${aclInfo.principalId},
		field.moduleId,
		!field.checked
	);
}

//点击启用checkbox
function usePermission(field){
	//如果checkbox被选中，意味着需要更新ACL的状态
	//更新C/R/U/D以及Extends状态
	
	//设置为同步方式，以便DWR依次发出下列请求
	dwr.engine.setAsync(false);
	
	if(field.checked){
		addOrUpdatePermission($(field.moduleId+"_C"));
		addOrUpdatePermission($(field.moduleId+"_R"));
		addOrUpdatePermission($(field.moduleId+"_U"));
		addOrUpdatePermission($(field.moduleId+"_D"));
		<c:if test="${aclInfo.principalType eq 'User' }">
		addOrUpdateExtends($(field.moduleId+"_EXT"));
		</c:if>
	}else{
		aclManager.delPermission(
			"${aclInfo.principalType}",
			${aclInfo.principalId},
			field.moduleId		
		);
		$(field.moduleId+"_C").checked = false;
		$(field.moduleId+"_R").checked = false;
		$(field.moduleId+"_U").checked = false;
		$(field.moduleId+"_D").checked = false;
		<c:if test="${aclInfo.principalType eq 'User' }">
		$(field.moduleId+"_EXT").checked = false;
		</c:if>
	}
}

function initTable(){
	aclManager.searchAclRecord(
		"${aclInfo.principalType}",
		${aclInfo.principalId},
		function(datas){
			for(var i=0; i < datas.length; i++){
				var moduleId = datas[i][0];
				var cState = datas[i][1];
				var rState = datas[i][2];
				var uState = datas[i][3];
				var dState = datas[i][4];
				var extState = datas[i][5];
				
				$(moduleId+"_C").checked = cState == 0 ? false : true;
				$(moduleId+"_R").checked = rState == 0 ? false : true;
				$(moduleId+"_U").checked = uState == 0 ? false : true;
				$(moduleId+"_D").checked = dState == 0 ? false : true;
				<c:if test="${aclInfo.principalType eq 'User' }">
				$(moduleId+"_EXT").checked = extState == 0 ? true : false;
				</c:if>
				$(moduleId+"_USE").checked = true;
			}
		}
	);
}

</script>

 

结束！

评论

2 楼 it_dengdong 2012-08-27  

我现在都用jquery的ajax操作JSON了。

1 楼 w7006007 2012-08-27  

感觉DWR没用。用了还不如不用。