dwr笔记

最新推荐文章于 2018-10-30 19:40:38 发布

最新推荐文章于 2018-10-30 19:40:38 发布 · 139 阅读

文章标签：

#DWR #Spring #Bean #JavaScript #Hibernate #ViewUI

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在Input中输入一个值，当该input丢失焦点后，把该值作为参数通过dwr传到spring中调用对应的方法，返回一个pojo后，在页面对应的input中进行属性填充
dao:

public Equipment getEquipmentByCode(String code) { 
        String hql = "from Equipment where typecode = ?"; 
        Equipment equipment = null; 
        List list = this.findByOutQuery(hql, code); 
        if (list.isEmpty()){ 
            return null; 
        }else { 
           equipment =  (Equipment)list.get(0); 
        } 
        return equipment;//返回一个po对象，需要里面的name,model等属性 
    }

spring:

<beans  default-autowire="byName"> 
    <bean id="equipmentService" parent="baseTxProxy"> 
        <property name="target"> 
            <bean class="com.eway.equipment.service.EquipmentServiceImpl"/> 
        </property> 
    </bean> 
</beans>

dwr:

<convert match="com.eway.equipment.pojo.Equipment" converter="bean"/>//把该po进行转换 
        <create creator="spring" javascript="EquipmentService"> 
            <param name="beanName" value="equipmentService"/> 
              <include method="getEquipmentByCode"/>//对应上面spring的这个方法 
        </create>

jsp:

<script type='text/javascript' src='/dwr/interface/EquipmentService.js'></script> 
function getRepairInfo() { 
        var code = $("repair.code").value; 
        EquipmentService.getEquipmentByCode(code,fillInfo);//通过dwr调用后台业务，并调用回调函数 
    } 
<script type="text/javascript" language="java"> 

    function  fillInfo(equipment){//回调函数，填充值 
        if(equipment==null){ 
            DWRUtil.setValue("info",'<ww:property value="getText('nocode')"/>'); 
                   
        }else{ 
        DWRUtil.setValue("repair.name",equipment.name); 
         DWRUtil.setValue("repair.model",equipment.model); 
        DWRUtil.setValue("repair.conf",equipment.configureinfo); 
            DWRUtil.setValue("info",''); 
            } 
    } 
  <tr> 
            <td width="12%" align="center" class="common_td_lable"><ww:property value="getText('repair.code')"/></td> 
            <td width="30%" valign="middle" class="common_td_text"> 
                 <ww:textfield name="repair.code" maxlength="50" theme="simple" onblur="getRepairInfo();"/>//丢失焦点后触发事件 
                <small><span id="info"> </span></small> 
            </td> 
            <td width="12%" align="center" class="common_td_lable"><ww:property value="getText('repair.name')"/></td> 
            <td width="30%" valign="middle" class="common_td_text"> 
                 <ww:textfield name="repair.name" maxlength="50" theme="simple"/></td> 
        </tr> 
        <tr> 
            <td width="12%" align="center" class="common_td_lable"><ww:property value="getText('repair.model')"/></td> 
            <td width="30%" valign="middle" class="common_td_text"> 
                 <ww:textfield name="repair.model" maxlength="50" theme="simple"/></td> 
            <td width="12%" align="center" class="common_td_lable"><ww:property value="getText('repair.conf')"/></td> 
            <td width="30%" valign="middle" class="common_td_text"> 
                 <ww:textfield name="repair.conf" maxlength="50" theme="simple"/></td> 
        </tr>

ps:后来在另外一个环境，发现了个问题，总是在dwr中调用相应po时说，hibernate的session不存在或已关闭，试了n多方法，发现只要在web.xml中配置

<filter>
    <filter-name>OpenSessionInViewFilter</filter-name>
    <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
  </filter>

时，加入另外一个mapping即搞定

  <filter-mapping>
            <filter-name>OpenSessionInViewFilter</filter-name>
            <url-pattern>/dwr/*</url-pattern>
        </filter-mapping>

大概意思是如果是dwr请求hibernate查询，那么不用默认的lazy属性！！