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  • DWR学习笔记

    在web.xml中添加代码:

    <!-- 配置DWR -->
        <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>
            <init-param> 
               <param-name>classes</param-name> 
               <param-value>java.lang.Object</param-value> 
            </init-param> 
            <load-on-startup>1</load-on-startup>
        </servlet>
        <servlet-mapping>
            <servlet-name>dwr-invoker</servlet-name>
            <url-pattern>/dwr/*</url-pattern>
        </servlet-mapping>
    在WEB-INF目录下加入dwr.xml 代码如下:

    <!DOCTYPE dwr PUBLIC 
        "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN" 
        "http://www.getahead.ltd.uk/dwr//dwr20.dtd">
    <dwr>
        <allow>
            <create creator="spring" javascript="DwrAction" >         <!--方法名称-->
                <param name="beanName" value="dwrAction"></param> <!--对应applicationContext.xml中bean的名称-->
            </create>
       
        </allow>
    </dwr>
    applicationContext.xml中bean的配置如下:

    <!-- DWR 配置 -->
        <bean name="dwrdao" class="com.jjq.oa.dao.impl.DwrDaoImpl">
            <property name="hibernateTemplate">
                <ref bean="hibernateTemplate" />
            </property>
        </bean>   
       
        <bean name="dwrAction" class="com.jjq.oa.web.struts.action.DwrAction">
            <property name="dwrdao">
                <ref bean="dwrdao" />
            </property>
        </bean>
    action中的代码如下(DwrAction.JAVA)

    /**
    *  @creator       季枫
    *   @create-time   2009-2-6   下午02:48:07  
    */
    package com.jjq.oa.web.struts.action;
     
    import java.util.List;
     
    import com.jjq.oa.DwrDao;
    import com.jjq.oa.dao.po.Activitiestypes;
     
    public class DwrAction {
        /**
         *  @creator       季枫
         *   @create-time   2009-2-6   下午02:48:07
         *  @note  
         */
        DwrDao dwrdao;
       
        public void setDwrdao(DwrDao dwrdao) {
            this.dwrdao = dwrdao;
        }
     
        public String [] getActivitiestypes(){
           
            List activitiestypes =dwrdao.activitiestypes();
            
            String result[]= new String[activitiestypes.size() * 2];
            Object [] object=null;
               int b=0;
                 for(int i=0,j=0;i<activitiestypes.size();i++){
                     object = (Object [])activitiestypes.get(i);
                     result[j]=((Integer)object[0]).intValue()+"";
                     result[j+1]=(String)object[1];
                     System.out.println(result[j]+"|"+result[j+1]);
                     j=j+2;
                    
                    
                 }
                
            return result;
           
        }
       
       
       
    }
    接口文件代码如下(DwrDao.java):

    /**
    *  @creator       季枫
    *   @create-time   2009-2-6   下午02:51:19  
    */
    package com.jjq.oa.dao;
     
    import java.util.List;
     
    public interface DwrDao {
        /**
         *
         *@author 季枫
         *@create-time   2009-2-6   下午02:52:48
         *@note            活动类别
         */
        public List activitiestypes();
    }
    Dao的实现类代码如下(DwrDaoImpl.java):

    /**
    *  @creator       季枫
    *   @create-time   2009-2-6   下午02:53:27  
    */
    package com.jjq.oa.dao.impl;
     
    import java.util.List;
     
    import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
     
    import com.jjq.oa.dao.DwrDao;
    import com.jjq.oa.dao.po.Activitiestypes;
     
    public class DwrDaoImpl extends HibernateDaoSupport implements DwrDao{
     
        public List activitiestypes() {
            /**
             *  @creator       季枫
             *   @create-time   2009-2-6   下午02:53:27
             *  @note  
             */
            List rs = getHibernateTemplate().find("select id,name from Activitiestypes");
           
            return rs;
        }
        /**
         *  @creator       季枫
         *   @create-time   2009-2-6   下午02:53:27
         *  @note  
         */
    }
    前台JSP调用的代码如下:

    <script>
    DwrAction.getActivitiestypes(back);    //活动类别
     
     
     
    function back(arr){
    alert(arr.length);
    var str1="<select><option value=\'999\'>请选择</option>";
    for (i=0,j=1;i<arr.length;i++)
    {
    str1+="<option value=\'"+arr[i]+"\'>"+arr[j]+"</option>";
    j=j+2;
    i++;
    }
    str1+="</select>";
    alert(str1);
    classid.innerHTML=str1;
    }
    </script>
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    action中的主要代码如下

    public String mklist(){
            String [] name={"廖明焱","张杰","向志勇","陈刚","邓正超","罗佳","张云峰","王磊"};
            Date date=new Date();
            date=getPreviousWeekDay(date);
            tdate=new ArrayList<kaishui>();
            for (int i=1,j=0;i<100;i++,j++)
            {
               
                ks=new kaishui();
                date=getNextWeekDay(date);
               
                ks.setDatestr(date.getDate());
                ks.setMon(date.getMonth()+1);
                ks.setYear(date.getYear()+1900);
                ks.setTname(name[j]);
                //System.out.println(date);  
               
                tdate.add(ks);
                if (j==7)
                { 
                    j=-1;
                }
               
            }
            //System.out.println(tdate.size());
            return SUCCESS;
        }
     
     
     
     
     
     
     
         public static synchronized java.util.Date getNextWeekDay(Date date )
                 {
                 
                  GregorianCalendar gc = ( GregorianCalendar ) Calendar.getInstance();
                  gc.setTime( date );
                  switch ( gc.get( Calendar.DAY_OF_WEEK ) )
                  {
                   case ( Calendar.FRIDAY    ):
                    gc.add( Calendar.DATE, 1 );
                    break;
                   case ( Calendar.SATURDAY    ):
                    gc.add( Calendar.DATE, 1 );
                    break;
                   default:
                    gc.add( Calendar.DATE, 1 );
                    break;
                  }
                  //System.out.println(gc);
                  return gc.getTime();
                 }
         public static synchronized java.util.Date getPreviousWeekDay(Date date){
        
                 GregorianCalendar gc = ( GregorianCalendar ) Calendar.getInstance();
                  gc.setTime( date );
               
                   /**
                    * 详细设计:
                    * 1.如果date是星期日,则减3天
                    * 2.如果date是星期六,则减2天
                    * 3.否则减1天
                    */
                   switch ( gc.get( Calendar.DAY_OF_WEEK ) )
                   {
                    case ( Calendar.MONDAY    ):
                     gc.add( Calendar.DATE, -3 );
                     break;
                    case ( Calendar.SUNDAY    ):
                     gc.add( Calendar.DATE, -2 );
                     break;
                    default:
                     gc.add( Calendar.DATE, -1 );
                     break;
                   }
                   return gc.getTime();
                 
                 }
    页面的源码:

    <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    <%@taglib prefix="s" uri="/struts-tags"%>
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
      <head>
       
       
        <title>My JSP 'user_klist.jsp' starting page</title>
       
       
       
        <link rel="stylesheet" type="text/css" href="../css/users.css">
       
     
      </head>
     
      <body>
        <div class="klist">
            <s:iterator value="tdate"> 
               
           
                <li><s:property value="year"/>年<s:property value="mon"/>月<s:property value="datestr"/>日</li>
                <li>姓名:<s:property value="tname"/></li>
            </s:iterator>   
       
        </div>
      </body>
    </html>
    CSS文件源码:

    .klist {300px;overflow: hidden;margin-left: 10px;} 
    .klist li{float:left;148px;overflow: hidden; border:1px #A6C1E8 solid;text-align: center;}

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  • 原文地址:https://www.cnblogs.com/jifeng/p/1707561.html
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