DWR的配置

1.配置web.xml

<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-mapping>
    <servlet-name>dwr-invoker</servlet-name>
    <url-pattern>/dwr/*</url-pattern>
  </servlet-mapping>

2.配置dwr.xml和web.xml放在同一目录下

<?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>
<!--得到spring的bean对象-->
  <allow>
    <create creator="spring" javascript="aclManager">
      <param name="beanName" value="aclManager"/>
    </create>
  </allow>
</dwr>
<!--自己创建对象-->
<allow>
    <create creator="new" javascript="userManager>
      <param name="class" value="com.test.UserManager" />
    </create>
  </allow>
</dwr>

3.在页面中引入需要的的js
<!--调用相应的js-->引入dwr即可

  <script type='text/javascript' src='dwr/interface/userManager.js'></script>
  <script type='text/javascript' src='dwr/engine.js'></script>
  <script type='text/javascript' src='dwr/util.js'></script>

4.具体调用

<!--调用一般的方法 简单返回一个值的-->
userManager.login(userName,userId,callBack());
function callBack(data)
{
if(data==1)
alert("你登陆成功");
}
<!--返回值是一个list-->
userManager.getUsers(type,callBack);
function callBack(datas)
{
for(var i=0;i<datas.length;i++)
{
     var name=datas[i][0];
     var password=datas[i][1];
 .........

}
}
<!--返回的是一个对象-->
userManager.getUserById(id,callBack);
function callBack(data)
{
 alert(data.username);
 或者
alert(data["username"]);
}