本文实例为大家分享了java学生寝室查询系统的具体代码，供大家参考，具体内容如下
前端部分：
index.html
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>AHPU Freshman dormitory inquiry</title> <script src="confirm.js"></script><style>html,body{ margin:0px; padding:0px;}.main{ position: relative; width:500px; height:500px; background: url(image/ahpu1.jpg) no-repeat; margin:10px auto;}form>div{ margin:20px 10px; }address{ position: absolute; bottom:20px; left:30px;}</style> </head><body> <div class="main"> <form action="FindRoom/findInfo" method="post" > <div> <label for="sname" >姓名</label> <input type="text" name="sname" id="sname" required> </div> <div> <label for="sid">学号</label> <input type="text" name="sid" id="sid" required> </div> <div> <input id="submit" type="submit"> <input id="reset" type="reset"> </div> </form> <address><a href="javavscript:" rel="external nofollow" >双微工作室</a></address> </div></body></html>confrim.js:
var EventUtil={ addhandler:function(element,type,handler){ if(element.addEventListener){ element.addEventListener(type,handler,false); }else if(element.attachEvent){ element.attachEvent("on"+type,handler); }else{ element["on"+type]=handler; } }, removehandler:function(element,type,handler){ if(element.removeEventListener){ element.removeEventListener(type,handler,false); }else if(element.detachEvent){ element.detachEvent("on"+type,handler); }else{ element["on"+type]=null; } }, getEvent:function(event){ return event?event:window.event; }, getTarget:function(event){ return event.target || event.srcElement; }, preventDefault:function(event){ if(event.preventDefault){ event.preventDefault(); }else{ event.returnValue=false; } }, stopPropagation:function(event){//只能阻止事件冒泡 if(event.stopPropagation){ event.stopPropagation(); }else{ event.cancelBubble=true; } }};function confirmName(){ if(((sname.value).trim).length!=0){ reg=/^[/u4e00-/u9fa5]{1,10}$/; if(!reg.test(sname.value)){ sname.value=""; alert("请输入正确的姓名"); } }}function confirmSid(){ if(((sid.value).trim()).length!=0){ reg=/^([0-9]){10,10}$/; if(!reg.test(sid.value)){ sid.value=""; alert("请输入正确的学号"); } } }function confirm(){ EventUtil.addhandler(sname,"blur",confirmName); EventUtil.addhandler(sid,"blur",confirmSid);}window.onload=function(){ var sname=document.querySelector("#sname"); var sid=document.querySelector("#sid"); var po=document.querySelector("#submit"); confirm(); EventUtil.addhandler(po,"submit",confrimName); EventUtil.addhandler(po,"submit",confrimSid);};后端java部分：
package FindRoom;import java.io.IOException;import java.io.PrintWriter;import java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import java.sql.SQLException;import java.sql.Statement;//import javax.servlet.RequestDispatcher;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class findInfo extends HttpServlet { static final String JDBC_DRIVER = "com.mysql.jdbc.Driver"; static final String DB_URL = "jdbc:mysql://localhost:3306/RoomQuery"; // 数据库的用户名与密码，需要根据自己的设置 static final String USER = "root"; static final String PASS = "cd7089028"; public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.log("执行doGet方法...."); this.execute(request, response); } public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{ this.log("执行doPost方法...."); this.execute(request,response); } //执行方法 public void execute(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); response.setContentType("text/html"); PrintWriter out = response.getWriter(); //StringBuffer requestURI=request.getRequestURL(); // String method=request.getMethod(); String sname=request.getParameter("sname"); String sid=request.getParameter("sid"); response.setContentType("text/html"); //RequestDispatcher dispatcher=request.getRequestDispatcher("/RoomQuery/findInfo"); Connection conn = null; Statement stmt = null; try{ // 注册 JDBC 驱动 Class.forName(JDBC_DRIVER); // DriverManager.registerDriver(new com.mysql.jdbc.Driver()); // 打开链接 System.out.println("连接数据库..."); conn = DriverManager.getConnection(DB_URL,USER,PASS); // 执行查询 System.out.println(" 实例化Statement对..."); stmt = conn.createStatement(); String sql; sql = "SELECT * FROM SumRoid where SId="+sid; ResultSet rs = stmt.executeQuery(sql); // 展开结果集数据库 while(rs.next()){ // 通过字段检索 String flatNum=rs.getString("FlatNum"); String bedrootNum=rs.getString("BedroomNum"); String name = rs.getString("Sname"); String Sid = rs.getString("SId"); String ssex=rs.getString("Ssex"); String academy=rs.getString("academy"); String major=rs.getString("major"); // 输出数据 out.println("<!DOCTYPE HTML PUBLIC /"-//W3C//DTD HTML 4.01 Transitional//EN/">"); out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>"); out.println("<HTML>"); out.println("<BODY>"); out.println("<h3>"+sname+"同学欢迎你</h3>"); out.println("<p>公寓号："+flatNum+"</p>" +"<p>寝室号: " + bedrootNum+"</p>" +"<p>姓名: " + name+"</p>" +"<p>学号: " + Sid+"</p>" +"<p>性别: " + ssex+"</p>" + "<p>学院: " + academy+"</p>" +"<p>专业: " + major+"</p>"); } out.println("<BODY>"); out.println("</HTML>"); // 完成后关闭 rs.close(); stmt.close(); conn.close(); out.flush(); out.close(); }catch(SQLException se){ // 处理 JDBC 错误 se.printStackTrace(); }catch(Exception e){ // 处理 Class.forName 错误 e.printStackTrace(); }finally{ // 关闭资源 try{ if(stmt!=null) stmt.close(); }catch(SQLException se2){ }// 什么都不做 try{ if(conn!=null) conn.close(); }catch(SQLException se){ se.printStackTrace(); } } } }数据库mysql部分:
将excel中学生的信息存放在A盘的stu.txt文件中；
创建table:
3 . 将数据读入mysql数据库中：
load data local infile 'A:/stu.txt' into table SumRoid;
至此，一个超级简单的查询系统已完毕。
说明:
1. 在做表单输入验证时，bug很多；
2. jdbc的驱动一定要导入web-inf lib中；
3. web.xml配置一定要检查好；
4. 不能预防sql注入；
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持武林网。
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