web启动加载servlet得到Spring bean

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 org.apache.log4j.Logger;import org.springframework.web.context.WebApplicationContext;import org.springframework.web.context.support.WebApplicationContextUtils;public class InitServlet extends HttpServlet {private static final Logger log = Logger.getLogger(InitServlet.class);private static final long serialVersionUID = 6066089839055144264L;/** * 系统初始化参数servlet *  * @param servletConfig *            servlet */public void init(ServletConfig servletConfig) throws ServletException {ServletContext context = servletConfig.getServletContext();SelectAll selectAll = new SelectAll(context);try {selectAll.setArray();} catch (Exception e1) {log.error(e1.getMessage(), e1);}log.info("正在载入XML文件...\r\n ");LoadXmlFile loadXmlFile = new LoadXmlFile(servletConfig);loadXmlFile.setArray();// 载入XML文件log.info("正在载入WebService...\r\n ");StrWebService strWebService = new StrWebService(context);try {strWebService.setArray();// 载入WebService数据} catch (Exception e) {log.error(e.getMessage(), e);}log.info("系统初始化配置已完成!");}}

import java.sql.Connection;import java.sql.ResultSet;import java.sql.SQLException;import java.sql.Statement;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import javax.servlet.ServletContext;import javax.sql.DataSource;import org.apache.log4j.Logger;import org.springframework.web.context.WebApplicationContext;import org.springframework.web.context.support.WebApplicationContextUtils;public class SelectAll {    private static final Logger log = Logger.getLogger(SelectAll.class);    public static ServletContext servletConfig;    public SelectAll() {    public SelectAll(ServletContext context) {        this.servletConfig = context;    }    public List selectAll(String parCde, String parNme, String method) throws SQLException {        List list = new ArrayList<SelectDto>();        ResultSet crs = null;        Connection conn = null;        Statement stmt = null;        String sql = "";         if ("7".equals(method)) {            sql = " ";        }         WebApplicationContext wac=WebApplicationContextUtils.getWebApplicationContext(servletConfig);        log.info("got WebApplicationContext "+wac);        DataSource ds=(DataSource)wac.getBean("dataSource");        conn=ds.getConnection();        stmt = conn.createStatement();        crs = stmt.executeQuery(sql);        servletConfig.setAttribute(parNme, list);        return list;        } catch (Exception ex) {        log.error(ex.getMessage(), ex);        }finally        {        conn.close();        }        return null;    }    public void setArray() throws SQLException {        selectAll("", "province", "7");    }}

import java.io.File;import javax.servlet.ServletConfig;import javax.servlet.ServletContext;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import org.apache.log4j.Logger;public class LoadXmlFile {    private static final Logger log = Logger.getLogger(LoadXmlFile.class);    public static ServletConfig servletConfig;    public LoadXmlFile() {    }    public LoadXmlFile(ServletConfig context) {        this.servletConfig = context;    }    public void loadXmlFile(String parNme, String method) {        try {            String serviceFile = "";            if ("1".equals(method)) {                serviceFile = servletConfig.getInitParameter("1");            }            if ("2".equals(method)) {                serviceFile = servletConfig.getInitParameter("2");            }            if ("3".equals(method)) {                serviceFile = servletConfig.getInitParameter("3");            }            ServletContext context = servletConfig.getServletContext();            System.out.println("web.xml path="+context.getRealPath("") + serviceFile);                        File configFile = new File(context.getRealPath("") + serviceFile);            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();            factory.setNamespaceAware(true);            DocumentBuilder builder = factory.newDocumentBuilder();            context.setAttribute(parNme, builder.parse(configFile));        } catch (Exception e) {        log.error(e.getMessage(), e);        } finally {        }    }     public void setArray() {        loadXmlFile("edrItems0320Info", "1");        loadXmlFile("riskInfo", "2");//         loadXmlFile("edrItems0331Info", "3");           }}