AJAX框架 — DWR学习

<p>
  Name:
  <input type="text" id="demoName"/>
  <input value="Send" type="button" οnclick="update()"/>
  <br/>
  Reply: <span id="demoReply"></span>
</p>

Javascript source:

var services = new dojox.rpc.Service({
    target:"../dwr/jsonrpc",
    transport:"POST",
    envelope:"JSON-RPC-1.0",
    contentType:"application/json",
    services:{
        "Demo.sayHello":{
            returns:{"type":"string"},
            parameters:[{"type":"string"}]
        }
    }
});

function update() {
    var name = dojo.byId("demoName").value;
    var deferred = services.Demo.sayHello(name);
    deferred.addCallback(function(result) {
        dojo.byId("demoReply").innerHTML = result;
    });
}

Java source:

package org.getahead.dwrdemo.simpletext;

public class Demo {
    public String sayHello(String name) {
        return "Hello, " + name;
    }
}

dwr.xml

<?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 creator="new" javascript="Demo">
      <param name="class" value="org.getahead.dwrdemo.simpletext.Demo"/>
    </create>
  </allow>
</dwr>