RoyalAjax(7)------AjaxProcessor.java

最新推荐文章于 2006-04-17 00:04:00 发布

jarez

最新推荐文章于 2006-04-17 00:04:00 发布

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文章标签： import bean object servlet string class

本文链接：https://blog.youkuaiyun.com/jarez/article/details/666020

版权

本文介绍了一个基于Java的Ajax处理器实现，该处理器通过继承HttpServlet来处理HTTP GET和POST请求，并使用自定义的RequestWrapper来增强请求处理能力。文章展示了如何设置响应头避免浏览器缓存、解析请求参数并调用相应的处理类。

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package com.support.ajax;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.*;

import com.support.basic.RequestWrapper;

/**
* @author Jarez
* <pre>
*   <servlet>
*   <servlet-name>ajax_processor</servlet-name>
*   <servlet-class>com.support.ajax.AjaxProcessor</servlet-class>
*   </servlet>
*   <servlet-mapping>
*   <servlet-name>ajax_processor</servlet-name>
*   <url-pattern>/servlet/AjaxProcessor</url-pattern>
*   </servlet-mapping>
* </pre>
*
*/
public class AjaxProcessor extends HttpServlet {

private static final long serialVersionUID = -8384075176527116678L;
public void init(ServletConfig servletConfig) throws ServletException
{
  super.init(servletConfig);
}
protected void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException
{
  process(req,res);
}

protected void doPost(HttpServletRequest req,HttpServletResponse res) throws ServletException, IOException
{
  process(req, res);
}
private void process(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException
{
  res.setHeader("content-type","text/xml;charset=utf-8");
  RequestWrapper request=new RequestWrapper(req);
  String t=request.getString("SysGenRandomValue");//防止浏览器缓存机制影响数据同步
  System.err.println("AjaxProcessing Happened:"+t);
  String ahcn=request.getString("Ajax_Handler_ClassName");
  System.err.println("AjaxProcessing Handler:"+ahcn);
  AjaxReturnBean bean=new AjaxReturnBean();
  try {
   bean.setStatCode("success");
   Class cls=Class.forName(ahcn);
   Object obj=cls.newInstance();
   AjaxHandler handler=(AjaxHandler)obj;
   bean=handler.doHandlerAjax(request);
  } catch (ClassNotFoundException e) {
   bean.setMsg(e.getLocalizedMessage());
   bean.setStatCode("fail");
   e.printStackTrace();
  } catch (InstantiationException e) {
   bean.setStatCode("fail");
   bean.setMsg(e.getLocalizedMessage());
   e.printStackTrace();
  } catch (IllegalAccessException e) {
   bean.setStatCode("fail");
   bean.setMsg(e.getLocalizedMessage());
   e.printStackTrace();
  }
  PrintWriter out=res.getWriter();
  out.println("<Object>");
  out.println(AjaxUtil.getXMLDescription(bean));
  out.println("</Object>");
  out.flush();
  out.close();
}
}