dwr与spring相结合

<? xml version="1.0" encoding="ISO-8859-1" ?>
<! DOCTYPE web-app
        PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
        "http://java.sun.com/j2ee/dtds/web-app_2_3.dtd" >  
< web-app >
     < context-param >
         < param-name > log4jConfigLocation </ param-name >
         < param-value > /WEB-INF/log4j.properties </ param-value >
     </ context-param >
     < context-param >
         < param-name > contextConfigLocation </ param-name >
         < param-value > /WEB-INF/applicationContext.xml,/WEB-INF/main-servlet.xml </ param-value >
     </ context-param >
     < listener >
         < listener-class > org.springframework.web.util.Log4jConfigListener </ listener-class >
     </ listener >
     < servlet >
         < servlet-name > context </ servlet-name >
         < servlet-class > org.springframework.web.context.ContextLoaderServlet </ servlet-class >
         < load-on-startup > 1 </ load-on-startup >
     </ servlet >
     < servlet >
         < servlet-name > dwr </ servlet-name >
         < display-name > DWR Servlet </ display-name >
         < description > Direct Web Remoter Servlet </ description >
         < servlet-class > uk.ltd.getahead.dwr.DWRServlet </ servlet-class >
         < init-param >
             < param-name > debug </ param-name >
             < param-value > true </ param-value >
         </ init-param >
     </ servlet >
     < servlet-mapping >
         < servlet-name > dwr </ servlet-name >
         < url-pattern > /dwr/* </ url-pattern >
     </ servlet-mapping >
</ web-app >

<? xml version="1.0" encoding="UTF-8" ?>
<! DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 1.0//EN" "http://www.getahead.ltd.uk/dwr/dwr10.dtd" >
< dwr >
     < allow >
          < create
           creator ="spring"
          javascript ="UserManager" >
           < param  name ="beanName"  value ="UserManager" />
         </ create >
       </ allow>
</ dwr >

<? xml version="1.0" encoding="UTF-8" ?>
<! DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd" >
< beans >
< bean  id ="propertyConfigurer"  class ="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" >
         < property  name ="location" >
             < value > /WEB-INF/jdbc.properties </ value >
         </ property >
     </ bean >

     <!--  Local DataSource that works in any environment  -->

     < bean  id ="dataSource"  class ="org.springframework.jdbc.datasource.DriverManagerDataSource" >
         < property  name ="driverClassName" >
             < value > ${jdbc.driverClassName} </ value >
         </ property >
         < property  name ="url" >
             < value > ${jdbc.url} </ value >
         </ property >
         < property  name ="username" >
             < value > ${jdbc.username} </ value >
         </ property >
         < property  name ="password" >
             < value > ${jdbc.password} </ value >
         </ property >
     </ bean >
      <!-- OrderManager -->
     < bean  id ="UserManager"  class ="dwr.manager.UserManager" >
         < property  name ="dataSource" >
             < ref  local ="dataSource" />
         </ property >
     </ bean >
    
     </ beans >

package  dwr.manager;

import  org.springframework.jdbc.core.support.JdbcDaoSupport;
import  org.apache.commons.logging.Log;
import  org.apache.commons.logging.LogFactory;

 


public   class  UserManager  extends  JdbcDaoSupport  ... {
          private final Log log = LogFactory.getLog(getClass().getName());
public boolean getUser(String username)
...{
    String sql="select count(*) from user where userName=? ";

   int i=getJdbcTemplate().queryForInt(sql,new Object[]...{username});
    if(i>0)
    return true;
        else
     return false;

}
}

<% ... @ page contentType="text/html;charset=GBK" language="java"  %>
< html >
< head >< title > Simple jsp page </ title ></ head >


< script  type ='text/javascript'  src ='<%=request.getContextPath()% > ... /dwr/interface/UserManager.js'>
</script>


<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">
    function showResult(b) {
        if (b) {
            alert("已经有重复的登录名了！");
        } else {
            alert("登录名尚未注册过！");
        }
    }function checkRepeat(s) {
        var o = getElement(s);
        if (o) {
            UserManager.getUser(o.value, showResult);
        }
    }
    function getElement(name) {
        var result = null;
        var objs = document.getElementsByName(name);
        if (objs) {
            var o = objs[0];
            result = o;
        }
        return result;
    }
  
</script>

<body>
<input type="text" name="user" >
<input type="button" onclick="checkRepeat('user')" value="检查是否重复">


</body>
</html>

6 classpath加入dwr和spring的jar文件，注意必须有hibernate3.jar和bsf.jar，在IE和FireFox下，就可以用了。
其中参考了magicgod's blog（ http://www.matrix.org.cn/blog/magicgod/archives/week_2005_09_04.html#001419）