DWR基本使用

来源：互联网发布：2013年网络流行歌曲编辑：程序博客网时间：2024/06/05 10:01

一、把DWR.jar包放到当前java工程里面

二、在web.xml文件中引入DWR的servlet。

    <servlet>
<servlet-name>dwr-invoker</servlet-name>
<servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class>
<init-param>
  <description></description>
  <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>

三、客户端发送数据

<title>My JSP 'index.jsp' starting page</title>
  <meta http-equiv="pragma" content="no-cache">
  <meta http-equiv="cache-control" content="no-cache">
  <meta http-equiv="expires" content="0">
  <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
  <meta http-equiv="description" content="This is my page">
  
  <script type='text/javascript' src='dwr/interface/Hello.js'></script>
  <script type='text/javascript' src='dwr/engine.js'></script>
  <script type='text/javascript' src='dwr/util.js'></script>
  <script type='text/javascript' src='hello.js'></script>
</head>

四、服务器端处理

private Map<String, String[]> bikes;

public String hello(String name) {
return name + "你好啊";
}

public String[] getOptions() {
return new String[] { "良葛格", "毛美眉", "米小狗" };
}

public Hello() {
  bikes = new TreeMap<String, String[]>();
  bikes.put("2000", new String[] { "2000 T1", "2000 T2", "2000 T3" });
  bikes.put("2001", new String[] { "2001 A1", "2001 A2" });
  bikes.put("2002", new String[] { "2002 BW1", "2002 BW2", "2002 BW" });
  bikes.put("2003", new String[] { "2003 S320" });
  bikes.put("2004", new String[] { "2004 TA1", "2004 TA2", "2004 TA3" });
}

// public String[] getYears() {
//  String[] keys = new String[bikes.size()];
//  int i = 0;
//  for (String key : bikes.keySet()) {
//   keys[i++] = key;
//  }
//  return keys;
// }
public Map<String,String> getYears() {
//   List<String> arr=new ArrayList<String>();
//   arr.add("2002");
//   arr.add("2003");
//   arr.add("2004");
  Map<String,String> arr = new HashMap<String, String>();
  arr.put("1", "2009");
  arr.put("2", "2008");
  return arr;
}
public String[] getBikes(String year) {
  return bikes.get(year);
}

五、加载dwr.xml配置文件

<?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="new" javascript="Hello">
   <param name="class" value="testdwr.Hello" />
  </create>

</allow>
</dwr>

六、如果是在Spring里面继承使用dwr.xml配置有变化

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN"
"http://www.getahead.ltd.uk/dwr/dwr20.dtd">

</create>

  
</allow>
</dwr>