dwr分页(转)

本文介绍了如何在web.xml中配置DWRServlet及其相关参数设置,并展示了如何在dwr.xml中定义允许创建的Java对象及转换器。同时,提供了一个具体的Java类GetPages示例,演示了如何实现数据获取。

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在web.xml中配置DWRServlet如下:
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app 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"
    version
="2.4" id="dwr">
  
<display-name>DWR (Direct Web Remoting)</display-name>
  
<description>A Simple Demo DWR</description>
  
<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>
  
<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>3</param-value>
    
</init-param>
    
<init-param>
      
<param-name>detail</param-name>
      
<param-value>3</param-value>
    
</init-param>
    
<load-on-startup>0</load-on-startup>
  
</servlet>
  
<servlet-mapping>
    
<servlet-name>dwr-invoker</servlet-name>
    
<url-pattern>/dwr/*</url-pattern>
  
</servlet-mapping>
  
<servlet-mapping>
    
<servlet-name>action</servlet-name>
    
<url-pattern>*.do</url-pattern>
  
</servlet-mapping>
    
<jsp-config>
  
<taglib>
    
<taglib-uri>/tags/struts-bean</taglib-uri>
    
<taglib-location>/WEB-INF/struts-bean.tld</taglib-location>
  
</taglib>

  
<taglib>
    
<taglib-uri>/tags/struts-html</taglib-uri>
    
<taglib-location>/WEB-INF/struts-html.tld</taglib-location>
  
</taglib>

  
<taglib>
    
<taglib-uri>/tags/struts-logic</taglib-uri>
    
<taglib-location>/WEB-INF/struts-logic.tld</taglib-location>
  
</taglib>

  
<taglib>
    
<taglib-uri>/tags/struts-nested</taglib-uri>
    
<taglib-location>/WEB-INF/struts-nested.tld</taglib-location>
  
</taglib>

  
<taglib>
    
<taglib-uri>/tags/struts-tiles</taglib-uri>
    
<taglib-location>/WEB-INF/struts-tiles.tld</taglib-location>
  
</taglib>
  
</jsp-config>
</web-app>

(2)在dwr.xml中配置

<?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 javascript="GetPages" creator="new">
               
<param name="class" value="cn.com.project.GetPages"></param>
          
</create>
           
<convert converter="bean" match="cn.com.project.bean.TableGoodsOutputInfo" >
            
<param name="include" value="goodsOutputName,goodsModel,goodsOutputTime"></param>
        
</convert>
       
       
<create creator="struts" javascript="testFrm">
          
<param name="formBean" value="testActionForm"/>
          
</create>

    
</allow>
</dwr>

(3)GetPages类

package cn.com.project;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import cn.com.project.bean.TableGoodsOutputInfo;

public class GetPages ...{
     
private int pages = 1;
     
     
private int pageCount=20;
     
     
public int getFirst(int page) ...{
          pages
=page;
          
return pages;
     }

     
     
public int getNext(int page)...{
          
if(page==pageCount)
          
...{
           
return pageCount;
          }
else...{
           pages
=page;
           
return pages+1;
          }

     }

     
     
public int getUp(int page)
     
...{
      
if(page==1)
      
...{
       
return pages;
      }
else
      
...{
       pages
=page;
       
return pages-1;
      }

     }

     
     
public int getLast()
     
...{
      
return pageCount;
     }

     
     @SuppressWarnings(
"unchecked")
     
public List<cn.com.project.bean.TableGoodsOutputInfo> getJobs(int page,int argPage) throws Exception
     
...{
      List list
=new ArrayList<TableGoodsOutputInfo>();
      String sql;
      
try ...{
       
if(page==1)
       
...{
        sql
="select top "+argPage+" * from table_goods_input_info";
       }
else...{
        sql
="select top "+argPage+" * from table_goods_input_info where oder_form_id not in (select top (15*("+page+"-1)) oder_form_id from table_goods_input_info);";
       }

       TestConnction conn 
= new TestConnction();
       ResultSet rs
=conn.excuteQuery(sql);
       
while(rs.next())
       
...{
         TableGoodsOutputInfo pb
=new TableGoodsOutputInfo();
        pb.setGoodsOutputName(rs.getString(
3));
        pb.setGoodsModel(rs.getString(
7));
        pb.setGoodsOutputTime(rs.getDate(
8));
        list.add(pb);
       }

       conn.closeConnection(rs);
      }
 catch (SQLException e) 
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