Servlet 后台获取XML

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package net.nw.servlet;
import java.io.IOException;
import java.io.PrintWriter;

import javassist.expr.NewArray;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.nw.dao.Conn;
import net.nw.dao.ModelcodesDAO;

import java.sql.*;
import java.util.ArrayList;
import java.util.List;

public class DateServlet extends HttpServlet {
	private static final long	serialVersionUID	= 1L;
	private ModelcodesDAO mcd = new ModelcodesDAO();
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String where = null;
		String currdate= request.getParameter("currdate");
		String projectname=request.getParameter("projectname");
		String codeid = request.getParameter("modelname");
		String mname = mcd.getNameById(Integer.parseInt(codeid));
		where="where ProjectName like '%"+projectname+"%'  AND ModelCode like '%"+mname+"%'";

		StringBuffer xmlDOM = new StringBuffer();
		ResultSet rs=null;
		rs = this.getResultSet(where);
		xmlDOM.append("<root>");
		try {
			xmlDOM.append("<defects>");
			while (rs.next()) {
				xmlDOM.append("<defectmonth>");
				xmlDOM.append("<Day1>" + rs.getString("Day1") + "</Day1>");
				xmlDOM.append("<Day2>" + rs.getString("Day2") + "</Day2>");
				xmlDOM.append("</defectmonth>");
				request.setAttribute("daay1", rs.getString("Day1"));
				System.out.println(request.getAttribute("daay1"));
			}
			rs.close();
			xmlDOM.append("</defects>");
		} catch (SQLException e) {
			System.out.println(e.getMessage());
		}		

		xmlDOM.append("</root>");
		this.print(request, response, xmlDOM.toString());
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
			this.doGet(request, response);
	}

	private void print(HttpServletRequest request, HttpServletResponse response,String xmlDOM) throws IOException{
		response.setCharacterEncoding("utf-8");
		response.setContentType("text/xml");
		PrintWriter out = response.getWriter();
		out.print(xmlDOM);
		out.close();
	}

	private ResultSet getResultSet(String where){
		Connection conn = null;
		PreparedStatement pstmt = null;
		ResultSet rs = null;
		try {
			conn = getConn();
		} catch (ClassNotFoundException e) {
			System.out.println(e.getMessage());
		} catch (SQLException e) {
			System.out.println(e.getMessage());
		}

		String sql = "select * from defects_infor_daily "+where;
		System.out.println(sql);
		//String sql = "select top "+len+" * from person where pid >= ? order by pid";

		try {
			pstmt = conn.prepareStatement(sql);
			rs = pstmt.executeQuery();
		} catch (SQLException e) {
			System.out.println(e.getMessage());
		}
		return rs;
	}

	private Connection getConn() throws ClassNotFoundException, SQLException{

		String driver = "com.mysql.jdbc.Driver";
        String url="jdbc:mysql://109.110.100.56/tsdr_project";
    	String user="root";
    	String password="";
		Class.forName(driver);
		System.out.println("��ݿ�����");
		return DriverManager.getConnection(url,user,password);

	}

}

前台获取

　　var js = {
	XMLHttp:null,
		//发送请求函数
	sendRequest:function(url,responseFun,callback){
		//创建XMLHTTPRequest对象
		(function(){
			//根据浏览器类型创建XMLHTTPRequest对象
			if(window.XMLHttpRequest){
				js.XMLHttp = new XMLHttpRequest();
			}
			else{
				try{
					js.XMLHttp = new ActionXObject("Msxml2.XMLHTTP");
				}catch (e){
				　　try{
						js.XMLHttp = new ActiveXObject("Microsoft.XMLHTTP");
				　　} catch (e0){alert("Microsoft"+e0);}
				}
			}

		})();

		js.XMLHttp.open("POST", url, true);
		js.XMLHttp.onreadystatechange = function(responseFunction){
		　　if(js.XMLHttp.readyState == 4){
				if(js.XMLHttp.status == 200){
					responseFun(js.XMLHttp);
				}else{
					document.getElementById("canvasDivZhe").innerHTML = "<font color='red'>连接服务器异常...</font>"	;
				}
		　　}
		　　else{
			//document.getElementById("div").innerHTML = "<font color='red'>数据加载中...</font>"	;
		　　}
		};//指定响应函数
		js.XMLHttp.send(null);
		return js.XMLHttp;
	}
　　};

　　//响应函数
　　function responseFunction(xmlhttp){
		var xmlDOM = xmlhttp.responseXML; //接受服务器返回的xml文档
		//document.getElementById("div").innerHTML =xmlhttp.responseText;
		//alert(xmlhttp.responseText);
		parse(xmlDOM);//解析XML文档
　　}

   //解析XML文档
　　function parse(xmlDOM){
		//alert(xmlDOM);
		//var da=#request.daay1;
		var person = xmlDOM.getElementsByTagName("defectmonth");
		var day1=person[0].getElementsByTagName("Day1")[0].firstChild.data;
		alert(day1);

}//function end
//主调函数,以当前页作为参数
　　function AjaxTest(currdate,projectname,modelname) {
		var projectname="<%=session.getAttribute("projectname_session")%>";
		var modelname= document.getElementById("codeid").value;
		//alert(currdate+ " " +projectname+" "+modelname);
		js.sendRequest("DateServlet?currdate="+currdate+"&projectname="+projectname+"&modelname="+modelname,responseFunction,null);
　　}