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Atitit.ati?dwr的原理and设计?attilax?总结?java?php?版本

Jun 23, 2016 pm 01:28 PM

Atitit.ati dwr的原理and设计 attilax 总结 java php 版本

 

 

1. dwr的优点相对于ajax来说。。 1

2. DWR工作原理 1

3. Dwr的架构 2

4. 自定义dwr还是native dwr 2

5. ApiHandler的标准化method 2

6. Invok..  Dwr.exe() 2

7. api.jsp 3

8. prj.Wxb distribu   api.jsp 3

9. ----------code 4

10. ApiHandler 4

11. iocx 5

12. 参考 5

 

 

 

 

 

1.  dwr的优点相对于ajax来说。。

dwr是构建在ajax上的。。更加的dsl化。。

大大简化了编写ajax的工作量。 

 

 

2.  DWR工作原理

是通过动态把Java类生成为Javascript。它的代码就像Ajax一样,你感觉调用就像发生在浏览器端,但是实际上代码调用发生在服务器端,DWR负责数据的传递和转换。这种从Java 到JavaScript的远程调用功能的方式使DWR用起来有种非常像RMI或者SOAP的常规RPC机制,而且DWR的优点在于不需要任何的网页浏览器插件就能运行在网页上。 

Java从根本上讲是同步机制,然 AJAX却是异步的。所以你调用远程方法时,当数据已经从网络上返回的时候,你要提供有反调 (callback) 功能的DWR。 

 

DWR在客户端放置了一个 engine.js作为客户端的引擎,在Server端放置了一个dwr.jar作为服务器端的引擎。 

然后,可以以RPC的方式来描述

 

 

作者:: 老哇的爪子 Attilax 艾龙,  EMAIL:1466519819@qq.com

 

 

3. Dwr的架构

Dwr>>ajax>>>api.jsp

 

 

4. 自定义dwr还是native dwr

Native dwr要修正配置文件了.麻烦的..自定义dwr好使用的..

 

5. ApiHandler的标准化method

Sql

Select... $meta{“table”,orderby}, f1,f2

Update/insert/merger ....$meta{“table”} ,f1----f12

Delete....$meta{“table”} ,f1----f12 (where)

 

 

6. Invok..  Dwr.exe()

 

var mp={"method":"sql","param":"select * from wxb_news where news_id="+UrlParm.parm('news_id')};

 

dwrC.exec(mp,function($data){

jo=str2json($data);

  arr= jo;

 

   $("#table1_tmpl").tmpl(arr).appendTo('#table1');

 $("#table1_tmpl").hide();

},$app_path);

 

 

7. api.jsp

*  localhost:8080/wxb/api.jsp?method=sql¶m=select * from wxb_news

 

 

 

 

8. prj.Wxb distribu   api.jsp

 

if(request.getParameter("method")!=null)

 

{

 }

 

%>

ApiHandler ax = IocX.getBean(ApiHandler.class);

 

%>

 

 

9. ----------code 10. ApiHandler

 

@Inject

DBX dbx;

 

public ApiHandler() {

 

this.reg("sql", new Handler() {

 

@Override

public Object handleReq(Object arg) throws Exception {

// attilax 老哇的爪子 l_43_u o87

 

HttpServletRequest req=(HttpServletRequest) arg;

List li = dbx.findBySql(req.getParameter("param"));

 

return core.toJsonStrO88(li);

 

}

});

 

public String handleReq_dsl(HttpServletRequest req) {

String meth=req.getParameter("method");

Handler hd=(Handler) mp.get(meth);

try {

return (String) hd.handleReq(req);

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

return meth;

}

 

 

 

11. iocx

 

bd.bind(DBX.class).toProvider(new Provider() {

 

@Override

public DBX get() {

DataSource ds = (DataSource) SpringUtil

.getBean("dataSource");

 

try {

return new DbutilX(ds.getConnection());

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

return null;

}

});

 

 

12. 参考

atitit.php中的dwr 设计模式 - attilax的专栏 - 博客频道 - CSDN.NET.html

 

Atitit.dwr3 不能显示错误详细信息的解决方案,控件显示错误详细信息的解决方案 java .net php - attilax的专栏 - 博客频道 - CSDN.NET.html

Atitit.ati dwr的原理and设计 attilax 总结 java php 版本

 

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