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);

　　}