在spring项目中普通类如何得到spring容器管理的bean

今天碰到要在ssh项目中的一个普通类中访问spring容器管理的bean，现在找到一种解决办法，不知道是否是优化的，先记录下来，以免下次又要狂搜索。

package com.**；

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.SQLException;

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.sql.DataSource;

import oracle.xml.sql.query.OracleXMLQuery;

import org.springframework.context.ApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

public class XMLQuery extends HttpServlet throws ServletException
{
	public void init(ServletConfig config)
	{
		super.init(config);
		System.out.println("Init Success!!!!!!!!!!");
	        ServletContext context = config.getServletContext();
		ApplicationContext ctx = WebApplicationContextUtils.getRequiredWebApplicationContext(context);
		DataSource dataSource = (DataSource) ctx.getBean("dataSource");
		try
		{
			Connection conn = dataSource.getConnection();
			this.sqlToXML(conn);
		} catch (SQLException e)
		{
			e.printStackTrace();
		}
	}

	public void sqlToXML(Connection conn)
        {
	    try{
	        OracleXMLQuery query = new OracleXMLQuery(conn, "SELECT user_id,
                user_name, user_password FROM sys_user");
	        query.setRowTag("journal");
	        String xmlString=query.getXMLString();
	        OutputStream output=new FileOutputStream(new File("c:/catalog-output.xml"));
	        PrintWriter printWriter=new PrintWriter(output);
	        printWriter.print(xmlString);
	        printWriter.flush();
	     }catch(IOException e){}
	   }
}

还需要在web.xml中增加：

      
	<servlet>
		<servlet-name>TimerServlet</servlet-name>
		<servlet-class>com.hnnd.common.xmlquery.XMLQuery</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>