连接SQL server2008，并在SQL server2008中实现MySQL中group_concatd的分组；使用jsp和servlet实现页面的跳转和重写
2024-06-28 09:46:43
首先使用jsp制作主页面（将我之前的html页面改写为jsp页面），我的首页的jsp页面为default.jsp:
default.jsp页面代码:
<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<base href="/exprience/">
<script type="text/javascript" src="js/load.js"></script>
<title>首页</title>
<link rel="stylesheet" type="text/css" href="css/new.css">
<body bgcolor="lightblue"></body>
</head>
<body><div class="header"><%@ include file="cc/header.html"%></div><div class="top"><%@ include file="cc/top.html"%></div><div class="clearfix"><div class="column sidemenu"><%@ include file="cc/sidemenu.html"%></div><div class="column content"><%@ include file="cc/content.html"%></div><div class="yunzhuan"><%@ include file="cc/yunzhuan.html" %></div></div><div class="footer"><%@ include file="cc/footer.html"%></div>
</body>
</html>代码中的cc/header.html是html文件，以之前完整页面的div为块分别写入，我将他们放在了webapp下的cc文件夹，其中cc文件夹是我自己新创建的，项目的整体框架如图：
header.html:
<div class="header"> <!-- 标志logo栏 --><img src="data:image/附属第一医院.jpg" alt="CQMU1logo" width="500"/><!-- alt是当图片不显示的时候,预备的可替换图片的文本 --><div id="svid"><form action=""><input id="input" type="text" placeholder="请输入要搜索的内容"><input id="sbutton" name="搜索" type="image" src="data:image/搜索.jpg"></form> </div><div id="language"><input id="English" name="英文版" type="image" src="data:image/英文版.jpg"></div></div>top.html:
<div class="top"><div id="title"><span id="txt"></span>欢迎使用HIS系统（web版）<img src="data:image/HIS.jpg" alt="HIS" width="52"/></div><div id="denglu"><form action="denglu.jsp"><input id="sbutton2" type="submit" value="[登录]"></form></div>
</div>sidemenu.html:
<div class="colum sidemenu"><ul><li><a href="default.jsp" class="active">首 页</a></li><li><a href="yygh.html">预约挂号</a></li><li><a href="zjjs">专家介绍</a><div class="erji"><ul><li><a href="zjjs?did=0">骨科</a></li><li><a href="zjjs?did=1">妇产科</a></li><li><a href="zjjs?did=2">神经内科</a></li><li><a href="zjjs?did=3">泌尿外科</a></li></ul></div></li><li><a href="czxx.html">出诊信息</a></li><li><a href="jyjcxz.html">检验检查须知</a></li><li><a href="cjwt.html">常见问题</a></li><li><a href="yydh.html">医院导航</a></li></ul>
</div>content.html:
<div class="colum content" style="margin-left:35%;margin-top:-54%;width:600px;"><p style="text-indent:2em"> HIS是Hospital Information System 的缩写即医院信息系统美国该领域的著名教授Morris.Collen曾作如下定义:利用电子计算机和通讯设备，为医院所属各部门提供对病人诊疗信息和行政管理信息的收集、存储、处理、提取及数据交换的能力，并满足所有授权用户的功能需求。</p><p style="text-indent:2em"> HIS的主要功能按照数据流量、流向及处理过程分为临床诊疗、药品管理、经济管理、综合管理与统计分析、外部接口五部分。</p><p style="text-indent:2em"> HIS提高了医院的现代管理水平、提高了工作效率、优化了医疗流程、促进了医教研质量的提高、增加了医院的经济效益、有利于医改的落实、在突发公共卫生事件中发挥了特有的作用，同时提升了医院文化。</p><p style="text-indent:2em"> HIS的高级应用包括：医学图像存档与通信系统（picture archiving and communication system ，PACS）,病人床边信息系统，电子病历系统，科研支持系统，教学支持系统，Internet 医学情报系统，远程诊断与教学系统等。</p><p style="text-indent:2em"> 病人床边信息系统，电子病历系统，科研支持系统。</p>
</div>yunzhuan.html:
<div class="yunzhuan" style="margin-left:65%;"><img src="./image/工作运转图像.jpg" width="400px" />
</div>footer.html:
<div class="footer"><p>地址：某市某区某路1号 电话：*******</p><p>附属第一医院版权所有 *ICP备*****号</p>
</div>此外，还需要在web.xml中添加如下内容进行配置，其中*.html意味着被包含文件的扩展名是html：
<jsp-config><jsp-property-group><description>encodingConfiguration</description><display-name>html encoding</display-name><url-pattern>*.html</url-pattern><page-encoding>UTF-8</page-encoding></jsp-property-group></jsp-config>接下来需要使用到数据库，我所使用的是sqlserver2008版本的数据库。
基本要求就是进行登录，登录成功转发到首页，显示用户名和退出链接；登录失败返回登录页面并显示提示信息，点击退出则注销session并回到首页。
提示：制作Servlet对登录进行验证；使用session传递用户名或登录失败信息；在获取session信息并显示之前要对信息有无进行判断；
首先展示我的数据库内容部分：
使用的是身份验证而不是Windows验证：
然后就是连接demo数据库，从dengdu表中得到yonghu和密码进行比对，正确就回到主页，错误出现提示信息。
先制作DengluServlet.java接收数据库中的信息，成功跳转到denglu_successful.jsp，失败就跳转到denglu_defeat.jsp页面：
DengluServlet.java:
package edu.jsp;import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;/*** Servlet implementation class DengluServlet*/
@WebServlet("/DengluServlet")
public class DengluServlet extends HttpServlet {private static final long serialVersionUID = 1L;/*** @see HttpServlet#HttpServlet()*/public DengluServlet() {super();// TODO Auto-generated constructor stub}/*** @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)*/protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stub//response.getWriter().append("Served at: ").append(request.getContextPath());request.setCharacterEncoding("utf-8");response.setContentType("text/html;charset=UTF-8");HttpSession session=request.getSession();PrintWriter out=response.getWriter();String yonghu=request.getParameter("yonghu");String mima=request.getParameter("mima");Connection conn = null;PreparedStatement pst=null;ResultSet rs = null;String driver = "com.microsoft.sqlserver.jdbc.SQLServerDriver";String url = "jdbc:sqlserver://127.0.0.1:1433;databaseName=demo;integratedSecurity=true;";String user="sa";String password="123456";String sql="select id from denglu where yonghu=? and mima=?";try {Class.forName(driver);conn = DriverManager.getConnection(url,user,password);//sql="select * from denglu"; pst = conn.prepareStatement(sql);pst.setString(1, yonghu);pst.setString(2, mima);rs = pst.executeQuery(); if (rs.next()) {session.setAttribute("yonghu", yonghu);if (session.getAttribute("msg")!=null) session.removeAttribute("msg");request.getRequestDispatcher("denglu_successful.jsp").forward(request, response);return;} else {session.setAttribute("msg", "用户名或密码错误，请重新登录！！！");if (session.getAttribute("yonghu")!=null) session.removeAttribute("yonghu");response.sendRedirect("denglu_defeat.jsp");return;}}catch (SQLException | ClassNotFoundException e) {e.printStackTrace();}finally {if(rs != null)try {rs.close();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}if(pst != null)try {pst.close();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}if(conn != null)try {conn.close();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}/*** @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)*/protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stubdoGet(request, response);}}
下面的是连接数据库的语句，password和user每个人可能不同，以及自己的数据库名：
下面的就是登陆成功denglu_successful.jsp的页面代码以及成果：
<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<base href="/exprience/">
<script type="text/javascript" src="js/load.js"></script>
<title>首页</title>
<link rel="stylesheet" type="text/css" href="css/new.css">
<body bgcolor="lightblue"></body>
</head>
<body><div class="header"><%@ include file="cc/header.html"%></div><div class="top"><%@ include file="cc/top_successful.html"%></div><div class="clearfix"><div class="column sidemenu"><%@ include file="cc/sidemenu.html"%></div><div class="column content"><%@ include file="cc/content.html"%></div><div class="yunzhuan"><%@ include file="cc/yunzhuan.html" %></div></div><div class="footer"><%@ include file="cc/footer.html"%></div>
</body>
</html>
上面新写了一个html的页面，也就是top_successful .html:
<div class="top"><div id="title"><span id="txt"></span>欢迎使用HIS系统（web版）<img src="data:image/HIS.jpg" alt="HIS" width="52"/></div><div id="denglu" style="font-size:30px;"> <form action="denglu.jsp"><% if (session.getAttribute("yonghu")!=null) {%><a href="#">你好,<%=session.getAttribute("yonghu")%></a>| <a href="quit">[ 退 出 ]</a><%} else {%><span><a href="denglu.jsp">[ 登 录 ]</a>| <a href="register.html">[ 注 册 ]</a></span><%}%><!-- <input id="sbutton2" type="submit" value="[登录]"> --></form> </div>
</div>下面的就是登陆失败denglu_defeat.jsp的页面代码以及结果:
<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<base href="/exprience/">
<script type="text/javascript" src="js/load.js"></script>
<title>登录页面</title>
<link rel="stylesheet" type="text/css" href="css/new.css">
<body bgcolor="lightblue"></body>
</head>
<body><div class="header"><%@ include file="cc/header.html"%></div><div class="top"><%@ include file="cc/top.html"%></div><div class="clearfix"><div class="column sidemenu"><%@ include file="cc/sidemenu.html"%></div><div class="double"><%if (session.getAttribute("msg")!=null) {out.println("<p>"+(String)session.getAttribute("msg")+"</p>");}%><div id="dlt" style="margin-left:-5%;padding:1px 30px;height:0px;"><img src="data:image/登录.jpg" alt="登录" width="300px" height="336px" /></div><div id="login-box" style="margin-left:45%;margin-top:10%;height:304px;"><h1 >登录</h1><form action="Denglu" method="get">用户：<input id="yonghu" name="yonghu" type="text" placeholder="请输入您的账号"><br/>密码：<input id="mima" name="mima" type="password" placeholder="请输入您的密码"><br/><input type="submit" name="button" value="登录"><br/></form></div></div></div><div class="footer"><%@ include file="cc/footer.html"%></div>
</body>
</html> 依旧要在web.xml中进行配置：
<servlet><servlet-name>Denglu</servlet-name><servlet-class>edu.jsp.DengluServlet</servlet-class></servlet><servlet-mapping><servlet-name>Denglu</servlet-name><url-pattern>/Denglu</url-pattern></servlet-mapping>最后是对专家介绍的改写，依旧将信息存放在数据库中，通过连接数据库实现页面的跳转：
这次使用的表名叫做experts：
在MySQL中有一个函数group_concat连接字段，但是SQL server2008却没有这个函数，所以为了实现分组连接，我使用了STUFF来达到group_concat的结果：
具体代码如下：
SELECT department,COUNT(department) num,
STUFF(( SELECT ','+ [id] FROM experts b WHERE b.department = a.department FOR XML PATH('')),1 ,1, '') [ids],
STUFF(( SELECT ','+ [name] FROM experts b WHERE b.department = a.department FOR XML PATH('')),1 ,1, '') [names],
STUFF(( SELECT ','+ [picture] FROM experts b WHERE b.department = a.department FOR XML PATH('')),1 ,1, '') [pictures]
from experts a
group by department一些解释，连接id后重命名为ids，连接name后重命名为names，连接picture后重命名为pictures，其中a是为表experts取的别名。
然后就是ExpertServlet.java的代码：
package edu.jsp;import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;/*** Servlet implementation class ExpertServlet*/
@WebServlet("/ExpertServlet")
public class ExpertServlet extends HttpServlet {private static final long serialVersionUID = 1L;/*** @see HttpServlet#HttpServlet()*/public ExpertServlet() {super();// TODO Auto-generated constructor stub}/*** @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)*/protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stub//response.getWriter().append("Served at: ").append(request.getContextPath());request.setCharacterEncoding("utf-8");String did=request.getParameter("did");Connection conn = null;PreparedStatement pst=null;ResultSet rs = null;String driver = "com.microsoft.sqlserver.jdbc.SQLServerDriver";String url = "jdbc:sqlserver://127.0.0.1:1433;databaseName=demo;integratedSecurity=true;";String user="sa";String password="123456";String sql="";try {Class.forName(driver);conn=DriverManager.getConnection(url,user,password);if (did==null) {sql="SELECT department,COUNT(department) num,STUFF(( SELECT ','+ [id] FROM experts b WHERE b.department = a.department FOR XML PATH('')),1 ,1, '') [ids],STUFF(( SELECT ','+ [name] FROM experts b WHERE b.department = a.department FOR XML PATH('')),1 ,1, '') [names],STUFF(( SELECT ','+ [picture] FROM experts b WHERE b.department = a.department FOR XML PATH('')),1 ,1, '') [pictures] from experts a group by department";pst=conn.prepareStatement(sql);} else {sql="SELECT department,COUNT(department) num,STUFF(( SELECT ','+ [id] FROM experts b WHERE b.department = a.department FOR XML PATH('')),1 ,1, '') [ids],STUFF(( SELECT ','+ [name] FROM experts b WHERE b.department = a.department FOR XML PATH('')),1 ,1, '') [names],STUFF(( SELECT ','+ [picture] FROM experts b WHERE b.department = a.department FOR XML PATH('')),1 ,1, '') [pictures] from experts a where left(id,1)=? group by department";pst=conn.prepareStatement(sql);pst.setString(1, did);}rs=pst.executeQuery();ArrayList<String> dep=new ArrayList<>();ArrayList<String> ids=new ArrayList<>();ArrayList<String> names=new ArrayList<>();ArrayList<String> pictures=new ArrayList<>();ArrayList<Integer> num=new ArrayList<>();while (rs.next()){dep.add(rs.getString("department"));ids.add(rs.getString("ids"));names.add(rs.getString("names"));pictures.add(rs.getString("pictures"));num.add(rs.getInt("num"));}request.setAttribute("dep", dep);request.setAttribute("ids", ids);request.setAttribute("names", names);request.setAttribute("pictures", pictures);request.setAttribute("num", num);request.getRequestDispatcher("showexp.jsp").forward(request, response);return;}catch (ClassNotFoundException | SQLException e) {e.printStackTrace();}finally {if(rs != null)try {rs.close();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}if(pst != null)try {pst.close();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}if(conn != null)try {conn.close();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}
}/*** @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)*/protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stubdoGet(request, response);}}
此处的sql就是上面的sql语句，if中的语句在SQL server2008中可以运行，但是else中的sql不可以在数据库中运行，应为有一个问号，问号是做判断的，不会报错：
点击页面中的专家介绍可以成功跳转到所有专家的页面，也就是showexp.jsp：
<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%>
<%@ page import="java.util.ArrayList" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<base href="/exprience/">
<title>显示专家</title>
<link rel="stylesheet" type="text/css" href="css/new.css">
<link rel="stylesheet" type="text/css" href="css/main.css">
<body bgcolor="lightblue"></body>
</head>
<body><div class="header"><%@ include file="cc/header.html"%></div><div class="top"><%@ include file="cc/top_successful.html"%></div><div class="clearfix"><div class="column sidemenu"><%@ include file="cc/sidemenu.html"%></div><div class="column contentone"><%ArrayList<String> dep=new ArrayList<>();ArrayList<String> ids=new ArrayList<>();ArrayList<String> names=new ArrayList<>();ArrayList<String> pictures=new ArrayList<>();ArrayList<Integer> num=new ArrayList<>();if (request.getAttribute("dep")!=null) dep=(ArrayList<String>)request.getAttribute("dep");if (request.getAttribute("ids")!=null) ids=(ArrayList<String>)request.getAttribute("ids");if (request.getAttribute("names")!=null) names=(ArrayList<String>)request.getAttribute("names");if (request.getAttribute("pictures")!=null) pictures=(ArrayList<String>)request.getAttribute("pictures");if (request.getAttribute("num")!=null) num=(ArrayList<Integer>)request.getAttribute("num");int c=dep.size();for (int k=0;k<=c-1;k++) {String[] id=ids.get(k).split(",");String[] name=names.get(k).split(",");String[] picture=pictures.get(k).split(",");int n =num.get(k);int rows=(n%4==0)?n/4:n/4+1;out.println("<div class=\"ti\">"+dep.get(k)+"</div>");for (int i=0;i<rows;i++) {out.println("<div class=\"clearfix\">");for (int j=0;j<=3;j++) {int en=i*4+j;if (en<=n-1) {out.println("<div class=\"img-container\">");out.println("<a href=\"einfo?eid="+id[en]+"\"><img src=\"image/"+picture[en]+"\"></a>");out.println("<p><a href=\"einfo?eid="+id[en]+"\">"+name[en]+"</a></p>");out.println("</div>"); } else { break;}}out.println("</div>");out.println("<hr>");}}%></div></div><div class="footer"><%@ include file="cc/footer.html"%></div></body>
</html>代码中的einfo是用于跳转到单人介绍中的。
这里新加了一个css文件，叫做main.css，下面的代码依旧会用到这个css文件，具体代码如下：
@charset "UTF-8";
* {box-sizing: border-box;
}
body {text-align:center;
}
.clearfix::after {content: "";clear: both;display: table;
}.contentone {margin-left:180px;width:85%;
}.contentone .ti {width:1100px;text-align:center;font-size:25px;color:white;background-color: blue;padding:10px;}
.contentone img {width:160px;height:180px;}
.img-container {text-align: center;float: left;width: 25%;padding: 15px;}此外依旧需要在web.xml中进行配置：
<servlet><servlet-name>Showexp</servlet-name><servlet-class>edu.jsp.ExpertServlet</servlet-class></servlet><servlet-mapping><servlet-name>Showexp</servlet-name><url-pattern>/Showexp</url-pattern></servlet-mapping><servlet><servlet-name>zjjs</servlet-name><servlet-class>edu.jsp.ExpertServlet</servlet-class></servlet><servlet-mapping><servlet-name>zjjs</servlet-name><url-pattern>/zjjs</url-pattern></servlet-mapping>如果出现404资源不可访问，一定要确定下面两个名称是否相同，我当时就因为写错了一个字母，卡了两天：
最后的成果长这样：
我们也可以登录然后点击专家介绍进行查看：
最后的就是对单人的页面进行制作了，ExpertinfoServlet.java:
package edu.jsp;import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;/*** Servlet implementation class ExpertinfoServlet*/
@WebServlet("/ExpertinfoServlet")
public class ExpertinfoServlet extends HttpServlet {private static final long serialVersionUID = 1L;/*** @see HttpServlet#HttpServlet()*/public ExpertinfoServlet() {super();// TODO Auto-generated constructor stub}/*** @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)*/protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stub//response.getWriter().append("Served at: ").append(request.getContextPath());request.setCharacterEncoding("utf-8");response.setContentType("text/html;charset=utf-8");String eid=request.getParameter("eid");Connection conn = null;PreparedStatement pst=null;ResultSet rs = null;String driver = "com.microsoft.sqlserver.jdbc.SQLServerDriver";String url = "jdbc:sqlserver://127.0.0.1:1433;databaseName=demo;integratedSecurity=true;";String user="sa";String password="123456";String sql="";try {Class.forName(driver);conn=DriverManager.getConnection(url,user,password);if (eid==null) {request.setAttribute("smsg", "需要编号参数！");} else {sql="select * from experts where id=?";pst=conn.prepareStatement(sql);pst.setString(1, eid);rs=pst.executeQuery();if (rs.next()) {request.setAttribute("department", rs.getString("department"));request.setAttribute("name", rs.getString("name"));request.setAttribute("picture", rs.getString("picture"));request.setAttribute("info", rs.getString("info"));}else {request.setAttribute("smsg", "查无记录！");}}request.getRequestDispatcher("expinfo.jsp").forward(request, response);return;} catch (ClassNotFoundException | SQLException e) {e.printStackTrace();}finally {if(rs != null)try {rs.close();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}if(pst != null)try {pst.close();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}if(conn != null)try {conn.close();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}/*** @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)*/protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stubdoGet(request, response);}}
最后进入到expinfo.jsp:
<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%>
<%@ page import="java.util.ArrayList" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<base href="/exprience/">
<title>专家信息</title>
<link rel="stylesheet" type="text/css" href="css/new.css">
<link rel="stylesheet" type="text/css" href="css/main.css">
<body bgcolor="lightblue"></body>
</head>
<body><div class="header"><%@ include file="cc/header.html"%></div><div class="top"><%@ include file="cc/top_successful.html"%></div><div class="clearfix"><div class="column sidemenu"><%@ include file="cc/sidemenu.html"%></div><div class="column contentone"><%if (request.getAttribute("smsg")==null) {if (request.getAttribute("name")!=null) {out.println("<div class=\"expertinfo\"><h2>科室："+(String)request.getAttribute("department")+" 姓名："+(String)request.getAttribute("name")+"</h2>");out.println("<img src=\"image/"+(String)request.getAttribute("picture")+"\">");out.println("<p class=\"info\">"+(String)request.getAttribute("info")+"</p></div>"); } else {out.println("<p>"+(String)request.getAttribute("smsg")+"</p>");}}%></div></div><div class="footer"><%@ include file="cc/footer.html"%></div>
</body>
</html>也需要在web.xml中进行配置：
<servlet><servlet-name>einfo</servlet-name><servlet-class>edu.jsp.ExpertinfoServlet</servlet-class></servlet><servlet-mapping><servlet-name>einfo</servlet-name><url-pattern>/einfo</url-pattern></servlet-mapping>这里的einfo一定要与的showexp.jsp中的保持相同，这样点击图片或者文字才能成功跳转，并且einfo与数据库中的info还不能同名，否则会出现问题：
最后的结果就是:
连接SQL server2008，并在SQL server2008中实现MySQL中group_concatd的分组；使用jsp和servlet实现页面的跳转和重写相关推荐
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